阅读说明：本技术 在无线通信系统中生成振荡信号的装置和方法 (Apparatus and method for generating oscillation signal in wireless communication system ) 是由 李燽石 李佑在 李大英 于 2018-12-11 设计创作，主要内容包括：本公开涉及被提供用于将支持比第四代(4G)系统(诸如长期演进(LTE))更高数据速率的准第五代(pre-5G)或5G通信系统。根据本公开的各个实施例,无线通信系统中的发射器的装置可以包括：振荡电路,其用于提供振荡信号；以及射频(RF)电路,其用于使用振荡信号转换发射信号的频率；并且发送该发射信号。该振荡电路可以生成差分信号形式的基础振荡信号,通过将构成差分信号的第一信号和第二信号进行倍频,从第一信号生成第一信号集,并从第二信号生成第二信号集；以及生成信号,在该信号中利用第一信号集和第二信号集抑制了与预期频率分量相邻的至少一个谐波分量的信号。(The present disclosure relates to a quasi-fifth generation (pre-5G) or 5G communication system provided to support a higher data rate than a fourth generation (4G) system, such as Long term evolution (L TE), according to various embodiments of the present disclosure, an apparatus of a transmitter in a wireless communication system may include an oscillation circuit to provide an oscillation signal, and a Radio Frequency (RF) circuit to convert a frequency of a transmission signal using the oscillation signal, and transmit the transmission signal.)

1. An apparatus of a transmitter in a wireless communication system, the apparatus comprising:

an oscillation circuit for providing an oscillation signal; and

radio Frequency (RF) circuitry configured to:

converting a frequency of a transmission signal using the oscillation signal; and is

The transmission signal is transmitted, and the transmission signal is transmitted,

wherein the oscillation circuit is configured to:

a base oscillator signal in the form of a differential signal is generated,

generating a first signal set from the first signal and a second signal set from the second signal by frequency-multiplying the first signal and the second signal constituting the differential signal; and

generating a signal in which at least one harmonic component adjacent to the desired frequency component is suppressed using the first and second signal sets.

2. The apparatus of claim 1, wherein the oscillating circuit is configured to suppress the adjacent at least one harmonic component by performing a linear operation between the first set of signals and the second set of signals.

3. The apparatus of claim 2, wherein the linear operation comprises an addition operation or a subtraction operation between the first set of signals and the second set of signals.

4. The apparatus of claim 3, wherein the addition operation is performed if the expected frequency component is an even multiple of the frequency of the base oscillation signal.

5. The apparatus of claim 3, wherein the subtraction is performed if the expected frequency component is an odd multiple of the frequency of the base oscillation signal.

6. The apparatus of claim 1, wherein the tank circuit is configured to suppress non-adjacent at least one harmonic component in the signal with the adjacent at least one harmonic component suppressed.

7. The apparatus of claim 6, wherein the non-adjacent at least one harmonic component is suppressed using a filtering characteristic of an amplifier or a band-pass filter.

8. The apparatus of claim 1, wherein the base oscillator signal comprises an output of a phase locked loop (P LL).

9. A method of operation of a transmitter in a wireless communication system, the method of operation comprising:

generating a base oscillation signal in the form of a differential signal;

generating a first signal set from the first signal and a second signal set from the second signal by frequency-multiplying the first signal and the second signal constituting the differential signal; and

generating a signal in which at least one harmonic component adjacent to the desired frequency component is suppressed using the first and second signal sets.

10. The method of claim 9, wherein generating the signal with the adjacent at least one harmonic component suppressed comprises:

performing a linear operation between the first set of signals and the second set of signals.

11. The method of claim 10, wherein the linear operation comprises an addition operation or a subtraction operation between the first set of signals and the second set of signals.

12. The method of claim 11, wherein the addition operation is performed if the expected frequency component is an even multiple of the frequency of the base oscillation signal.

13. The method of claim 11, wherein the subtraction is performed if the expected frequency component is an odd multiple of the frequency of the base oscillator signal.

14. The method of claim 9, further comprising:

suppressing non-adjacent at least one harmonic component in the signal in which the adjacent at least one harmonic component is suppressed.

15. The method of claim 9, wherein the base oscillator signal comprises an output of a phase locked loop (P LL).

Technical Field

The present disclosure relates generally to wireless communication systems, and more particularly, to an apparatus and method for generating an oscillation signal in a wireless communication system.

Background

Accordingly, the 5G or pre-5G communication system is also referred to as an "ultra-4G network" or a "post-long term evolution (L TE) system".

The 5G communication system is considered to be implemented in a higher frequency (mmWave) band (for example, 60GHz band) to achieve a higher data rate. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and massive antenna techniques have been discussed in 5G communication systems.

In addition, in the 5G communication system, system network improvement development based on advanced small cells, cloud Radio Access Network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multipoint (CoMP), receiving side interference cancellation, and the like is underway.

In the 5G system, hybrid Frequency Shift Keying (FSK) and Quadrature Amplitude Modulation (QAM) modulation (FQAM) and Sliding Window Superposition Coding (SWSC) as Advanced Coding Modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), Sparse Code Multiple Access (SCMA), etc. as advanced access technologies have been developed.

For communication in a high frequency band as in a 5G system, a terminal or a base station transmits data using a high frequency carrier. For this reason, an oscillator included in the transmitter needs to generate a high-frequency oscillation signal. Therefore, various methods of efficiently generating a high-frequency oscillation signal have been studied.

Disclosure of Invention

Technical problem

Based on the above discussion, the present disclosure provides an apparatus and method for efficiently generating an oscillation signal of a high frequency in a wireless communication system.

In addition, the present disclosure provides an apparatus and method for generating an oscillation signal of a desired frequency using a frequency multiplier in a wireless communication system.

In addition, the present disclosure provides an apparatus and method for suppressing unnecessary adjacent harmonic components generated by a frequency multiplier in a wireless communication system.

Technical scheme

According to various embodiments of the present disclosure, an apparatus of a transmitter in a wireless communication system may include: an oscillation circuit for providing an oscillation signal; and a Radio Frequency (RF) circuit for converting a frequency of a transmission signal using the oscillation signal and transmitting the transmission signal. The oscillation circuit may generate a base oscillation signal in the form of a differential signal, generate a first signal set from a first signal and generate a second signal set from a second signal by frequency-multiplying the first signal and the second signal constituting the differential signal; and generating a signal in which at least one harmonic component adjacent to the desired frequency component is suppressed using the first signal set and the second signal set.

According to various embodiments of the present disclosure, a method of operation of a transmitter in a wireless communication system may include: generating a base oscillation signal in the form of a differential signal; generating a first signal set from the first signal and a second signal set from the second signal by frequency-multiplying the first signal and the second signal constituting the differential signal; and generating a signal in which at least one harmonic component adjacent to the desired frequency component is suppressed using the first signal set and the second signal set.

Advantageous effects

Apparatuses and methods according to various embodiments of the present disclosure can effectively generate an oscillation signal of a desired frequency by suppressing harmonic components using a differential signal.

Effects obtainable from the present disclosure are not limited to the above-described effects, and other effects not mentioned may be clearly understood by those skilled in the art of the present disclosure through the following description.

Drawings

Fig. 1 illustrates a wireless communication system in accordance with various embodiments of the present disclosure.

Fig. 2 illustrates a configuration of a transmitter in a wireless communication system, in accordance with various embodiments of the present disclosure.

Fig. 3 illustrates an example of generating an oscillation signal using a frequency multiplier in a wireless communication system according to various embodiments of the present disclosure.

Fig. 4 illustrates an example of harmonic components generated by a frequency multiplier in a wireless communication system, in accordance with various embodiments of the present disclosure.

Fig. 5 illustrates a configuration of an oscillator in a wireless communication system according to various embodiments of the present disclosure.

Fig. 6 illustrates an example of an implementation of a differential converter of an oscillator in a wireless communication system, in accordance with various embodiments of the present disclosure.

Fig. 7 illustrates an example of an implementation of a frequency multiplier for an oscillator in a wireless communication system, in accordance with various embodiments of the present disclosure.

Fig. 8a and 8b illustrate implementation examples of adjacent harmonic component suppression units of an oscillator in a wireless communication system according to various embodiments of the present disclosure.

Fig. 9 illustrates an example of an implementation of a non-adjacent harmonic component suppression unit of an oscillator in a wireless communication system, in accordance with various embodiments of the present disclosure.

Fig. 10a and 10b illustrate implementation examples of oscillators in a wireless communication system according to various embodiments of the present disclosure.

Fig. 11 shows a flow diagram of a transmitter in a wireless communication system, in accordance with various embodiments of the present disclosure.

Detailed Description

The terminology used in the present disclosure is for describing particular embodiments and is not intended to limit the scope of other embodiments. The singular forms may include the plural forms unless specifically stated otherwise. All terms used herein, including technical and scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Among the terms used in the present disclosure, terms defined in a general dictionary may be interpreted as having the same or similar meaning as the context of the related art, and should not be interpreted ideally or excessively formally unless explicitly defined in the present disclosure. In some cases, even terms defined in the present disclosure should not be construed to exclude embodiments of the present disclosure.

In the embodiments of the present disclosure to be described below, a hardware method will be described as an example. However, since various embodiments of the present disclosure include techniques that use both hardware and software, various embodiments of the present disclosure do not preclude software-based approaches.

Hereinafter, the present disclosure relates to an apparatus and method for generating an oscillation signal in a wireless communication system. Specifically, the present disclosure explains a technique for suppressing harmonic components caused in generating an oscillation signal in a wireless communication system.

The terms indicating a signal, indicating a component of a circuit, indicating a network entity, and indicating a component of a device used in the following description are for explanatory purposes. Accordingly, the present disclosure is not limited to the terms to be described, but other terms having the same meaning in the art may be used.

In addition, the present disclosure describes various embodiments using terms used in some communication standards (e.g., the third generation partnership project (3GPP)), which terms are merely exemplary illustrations. The various embodiments of the present disclosure may be readily modified and applied to other communication systems.

Fig. 1 illustrates a wireless communication system in accordance with various embodiments of the present disclosure. Fig. 1 depicts base station 110, terminal 120, and terminal 130 as some nodes that use wireless channels in a wireless communication system. Although only one base station is depicted in fig. 1, other base stations that are the same as or similar to base station 110 may also be included.

Base station 110 is the network infrastructure used to provide wireless access to terminals 120 and 130. The base station 110 has a coverage area defined as a specific geographical area based on a signal transmission distance. In addition to base stations, the base station 110 may be referred to as an Access Point (AP), enodeb (enb), fifth generation node (5G node), next generation node b (gnb), wireless point, transmission/reception point (TRP), or other terms having technically the same meaning.

Terminal 120 and terminal 130 are both devices used by users and communicate with base station 110 over a wireless channel. In some cases, at least one of terminal 120 and terminal 130 may operate without user involvement. That is, at least one of the terminal 120 and the terminal 130 is a device that performs Machine Type Communication (MTC) and may not be carried by a user. In addition to terminals, terminal 120 and terminal 130 may each be referred to as User Equipment (UE), a mobile station, a subscriber station, a remote terminal, a wireless terminal, user equipment, or other terminology that is technically equivalent.

Base station 110, terminal 120, and terminal 130 may transmit and receive radio signals on a millimeter wave (mmWave) frequency band (e.g., 28GHz, 30GHz, 38GHz, 60 GHz.) as such, to improve channel gain, base station 110, terminal 120, and terminal 130 may perform beamforming.

The first antenna port and the second antenna port may be said to be QC L if the large scale characteristics of the channel carrying the symbols on the first antenna port can be inferred from the channel carrying the symbols on the second antenna port.

The base station 110 and the terminal 120 or the terminal 130 in fig. 1 transmit signals through a wireless channel. To this end, the base station 110 and the terminal 120 or the terminal 130 may include transmitters for generating Radio Frequency (RF) signals. Transmitters according to various embodiments may be configured as shown in fig. 2.

Fig. 2 illustrates a configuration of a transmitter in a wireless communication system, in accordance with various embodiments of the present disclosure. Fig. 2 shows a transmitter comprised in a base station 110, a terminal 120 or a terminal 130.

Referring to fig. 2, the transmitter includes a baseband processing unit 210, an oscillator 220, a mixer 230, an amplifier 240, and an antenna 250. The oscillator 220, mixer 230, and amplifier 240 may be collectively referred to as an RF circuit.

The baseband processing unit 210 performs various operations on the baseband signal and controls the RF circuit. For example, the baseband processing unit 210 may generate complex symbols by encoding and modulating a transmission bit stream according to a physical layer standard of a system. To this end, the baseband processing unit 210 may include at least one processor for operation and control.

The oscillator 220 generates an oscillation signal and provides the generated oscillation signal to the mixer 230. to this end, the oscillator may include a phase locked loop (P LL). in fig. 2, only one oscillator 220 is shown, but according to another embodiment, two or more oscillators for generating oscillation signals of different frequencies may be included.

The mixer 230 up-converts the frequency of the transmission signal provided from the baseband processing unit 210 using the oscillation signal provided from the oscillator 220. Only one mixer 230 is shown in fig. 2, but according to another embodiment, two or more mixers using oscillating signals of different frequencies may be included. In addition, although not shown in fig. 2, according to another embodiment, a digital-to-analog converter (DAC) for converting a digital signal into an analog signal may be further included between the baseband processing unit 210 and the mixer 230.

The amplifier 240 amplifies the power of the signal up-converted by the mixer 230. The antenna 250 radiates the signal amplified by the amplifier 240 on a wireless channel. The antenna may be implemented with an antenna array comprising a plurality of antenna elements. In addition, although not shown in fig. 2, according to another embodiment, a circuit for beam forming (e.g., a phase shifter) may be further included between the amplifier 240 and the antenna 250.

According to the example depicted in fig. 2, the transmitter comprises a single mixer and a single amplifier. However, according to another embodiment, two or more mixers or two or more amplifiers may be included. If two or more mixers are included, oscillator 220 may provide oscillating signals of the same or different frequencies to the two or more mixers.

As shown in FIG. 2, the oscillating signal may be used to be up-converted to a high frequency signal, typically, P LL is used to generate the oscillating signal, at which time the oscillator may directly generate the oscillating signal at its desired frequency by changing the design of P LL.

Fig. 3 illustrates an example of generating an oscillation signal using a frequency multiplier in a wireless communication system according to various embodiments of the present disclosure. Fig. 3 shows a case where two RF circuits use oscillation signals of different frequencies.

Referring to fig. 3, P LL 310 generates a base oscillation signal, for example, the frequency of the base oscillation signal may be 5.6GHz, and then, the base oscillation signal is divided into two signals by a dividing circuit 320, for example, the dividing circuit 320 may be implemented with a coupler, the divided base oscillation signals are respectively input to different frequency multipliers 330-1 and 330-2, in the example of fig. 3, the first frequency multiplier 330-1 performs a multiplication operation of m times, and the second frequency multiplier 330-2 performs a multiplication operation of n times, for example, m may be 3, and n may be 4, in this case, if the frequency of the base oscillation signal is 5.6GHz, an oscillation signal of 16.8GHz may be generated by the first frequency multiplier 330-1, and an oscillation signal of 22.4GHz may be generated by the second frequency multiplier 330-2, the oscillation signals generated by the first frequency multiplier 330-1 and the second frequency multiplier 330-2 are respectively provided to the first RF circuit 340-1 and the second RF circuit 340-2.

As shown in FIG. 3, even if a single P LL is used, oscillation signals of various frequencies can be generated by frequency multiplication.

The frequency multiplier 430 is based on a method of using harmonic components generated by the nonlinear characteristics of the semiconductor device. If the RF signal passes through a nonlinear device (e.g., a transistor, a diode, etc.), harmonic components having a frequency n times the input frequency (n is an integer equal to or greater than 1) are generated. Therefore, unexpected signal components, i.e., harmonic components, may be generated using the frequency multiplier, as shown in fig. 4.

Fig. 4 illustrates an example of harmonic components generated by a frequency multiplier in a wireless communication system, in accordance with various embodiments of the present disclosure. Referring to FIG. 4, the frequency of the input signal 420 is f₀. The input signal 420 is input to the frequency tripler 430, and the frequency tripler 430 generates a signal including a frequency of 3 · f₀Is output signal 404. However, the output signal 404 may also include the division 3 · f₀Other harmonic components than the intended frequency component, i.e. component f₀、2·f₀、4·f₀And 5. f₀。

Harmonic components are unwanted signals that need to be removed. In general, the harmonic components may be removed using the filtering characteristics of the output amplifier or by using a passive filter. However, filtering schemes may not easily remove the desired signal (e.g., component 3 · f of fig. 4)₀) Adjacent harmonic components (e.g., component 2 · f of fig. 4)₀And 4. f₀). In addition, since it is not easy to simultaneously implement the filtering characteristic and the broadband characteristic, difficulty in implementing the broadband frequency multiplier may increase. In other words, if the filter or amplifier is designed in a narrow band to remove adjacent harmonicsBy volume, it may be difficult to extend the operating frequency range of the frequency multiplier.

Accordingly, the present disclosure presents various embodiments for removing adjacent harmonic components. The structure of an oscillator according to various embodiments is shown in fig. 5. Fig. 5 illustrates a configuration of an oscillator in a wireless communication system according to various embodiments of the present disclosure. Fig. 5 may be understood as a configuration example of the oscillator 220. The names of the components used in fig. 5 are for understanding, and the names thereof do not limit the scope of the present invention.

Referring to fig. 5, the oscillator includes a base oscillation signal generation unit 510, a differential conversion unit 520, a frequency multiplication unit 530, an adjacent harmonic component suppression unit 540, and a non-adjacent harmonic component suppression unit 550.

The base oscillation signal generation unit 510 generates a base oscillation signal, which is an oscillation signal before frequency doubling and has a lower frequency than an oscillation signal required for an RF circuit, the base oscillation signal generation unit 510 may be implemented with P LL.

The differential conversion unit 520 converts the base oscillation signal into a differential signal. In other words, the differential conversion unit 520 generates another signal that is 180 ° out of phase with the input signal, and outputs the input signal and the other signal. For example, the differential conversion unit 520 may be implemented with at least one inductor. However, according to another embodiment, if the base oscillation signal is generated in the form of a differential signal, the differential conversion unit 520 may be omitted.

The frequency doubling unit 530 doubles each signal constituting the differential signal. In other words, the frequency multiplying unit 530 generates a higher frequency signal from each of the signals constituting the differential signal. For example, the frequency doubling unit 530 may be implemented with at least one diode or at least one transistor.

The adjacent harmonic component suppressing unit 540 suppresses harmonic components adjacent to the desired frequency component. For this reason, the adjacent harmonic component suppression unit 540 may perform a linear operation (e.g., addition, subtraction, etc.) between signals constituting the differential signal. At this time, the details of the linear operation may vary according to the relationship between the frequency of the desired frequency component and the frequency of the base oscillation signal. For example, the adjacent harmonic component suppression unit 540 may be implemented with at least one inductor.

The non-adjacent harmonic component suppression unit 550 suppresses harmonic components that are not adjacent to the desired frequency component. For this, the non-adjacent harmonic component suppression unit 550 may perform a filtering operation. For example, the non-adjacent harmonic component suppression unit 550 may be implemented using a band pass filter or an amplifier having a filtering characteristic.

As described with reference to fig. 5, the transmitter according to various embodiments may effectively suppress adjacent harmonic components using the characteristics of a differential signal. A specific embodiment of each component shown in fig. 5 is described below by referring to fig. 6 to 9.

Fig. 6 illustrates an implementation example of a differential conversion unit of an oscillator in a wireless communication system according to various embodiments of the present disclosure. Referring to fig. 6, the differential conversion unit 520 may be implemented using two inductors 622 and 624. If the frequency is f₀The input signal 610 passes through the first inductor 622, the output signals 620-1 and 620-2 in the form of differential signals are output to the two output terminals through the second inductor 624.

Fig. 7 illustrates an example of an implementation of a frequency doubling unit of an oscillator in a wireless communication system, in accordance with various embodiments of the present disclosure. Referring to fig. 7, the frequency doubling unit 530 may be implemented with a diode 732 or a transistor 734. If the input signals 710-1 and 720-2 in the form of differential signals are input, frequency-multiplied signals 720-1 and 720-2 corresponding to the input signals 710-1 and 720-2, respectively, are output. That is, output signals 720-1 and 720-2 are generated that include harmonic components of input signals 710-1 and 720-2, respectively. At this time, the components of the first output signal 720-1 generated from the first input signal 710-1 having a phase of 0 ° all have a positive (+) phase. However, some components of the second output signal 720-2 generated from the second input signal 710-2 having a phase of 180 ° have a positive (+) phase, and the rest have a positive (+) phase. Specifically, among the components of the second output signal 720-2, the odd-numbered components have negative (-) phases based on < equation 1> below, and the even-numbered components have positive (+) phases based on < equation 2> below.

< formula 1>

(2n+1)×f₀＜180°＝(2n+1)·f₀∠(360n+180°)

＝(2n+1)·f₀∠(360n+180°)

＝(2n+1)·f₀∠180°

＝-(2n+1)·f₀∠0°

< formula 2>

(2n)×f₀∠180^°＝(2n)·f₀∠(360n°)

＝(2n)·f₀∠(360n°)

＝(2n)·f₀＜0°

In that<Formula 1>And<formula 2>In, f₀Representing the frequency of the base oscillator signal.

Fig. 8a and 8b illustrate implementation examples of adjacent harmonic component suppression units of an oscillator in a wireless communication system according to various embodiments of the present disclosure. Referring to fig. 8a and 8b, the adjacent harmonic component suppression unit 540 may be implemented with at least one inductor 842, 844, or 846. Fig. 8a is an example of an implementation of the adjacent harmonic component suppression unit 540 in case the expected doubling value is odd, and fig. 8b is an example of an implementation of the adjacent harmonic component suppression unit 540 in case the expected doubling value is even.

Referring to fig. 8a, the adjacent harmonic component suppression unit 540 may be implemented using a first inductor 842 and a second inductor 844. If the input signals 810-1 and 820-2 of the multiplied differential signal pass through the first inductor 842 in different directions, the second inductor 844 generates the output signal 820-1 by subtracting between the input signals 810-1 and 820-2. Thus, even harmonic components are eliminated. That is, output signal 820-1 does not include even harmonic components, but only odd harmonic components.

Referring to fig. 8b, the adjacent harmonic component suppression unit 540 may be implemented with an inductor 846. If input signals 810-1 and 820-2 of the frequency doubled differential signal are input to the same end of inductor 846, output signal 820-2 is generated by summing input signals 810-1 and 820-2. Thus, odd harmonic components are eliminated. That is, output signal 820-2 does not include odd harmonic components, but only even harmonic components.

Fig. 9 illustrates an implementation of a non-adjacent harmonic component suppression unit of an oscillator in a wireless communication system, in accordance with various embodiments of the present disclosure. Fig. 9 shows the case where the expected doubling value is 3. Referring to fig. 9, the non-adjacent harmonic component suppression unit 550 may be implemented using a filter 952 or an amplifier 954. If the input signal 910 comprising odd harmonic components passes through the filter 952 or the amplifier 954, the components 3 · f₀Is passed, and the remaining non-adjacent component f₀And 5. f₀Is reduced in size. Thus, the principal component 3 · f can be obtained₀The output signal 920.

According to the above-described respective embodiments, a high frequency oscillator according to a frequency doubling method can be configured. Implementations according to various embodiments as described above may be selectively combined, and examples of both combinations are now described in fig. 10a and 10 b.

Fig. 10a and 10b illustrate examples of implementations of an oscillator in a wireless communication system, in accordance with various embodiments. Fig. 10a shows an example of removing non-adjacent harmonic components using the filter characteristic of the amplifier in the case where the expected multiplication frequency value is an odd number, and fig. 10a shows an example of removing non-adjacent harmonic components using the filter characteristic of the amplifier in the case where the expected multiplication frequency value is an even number.

Referring to fig. 10a, the differential conversion unit 1020 may be implemented using two inductors, the frequency doubling unit 1030 may be implemented using two transistors, the adjacent harmonic component suppression unit 1040-1 may be implemented using two inductors for subtraction, and the non-adjacent harmonic component suppression unit 1050 may be implemented using an amplifier. Referring to fig. 10b, the differential conversion unit 1020 may be implemented using two inductors, the frequency doubling unit 1030 may be implemented using two transistors, the adjacent harmonic component suppression unit 1040-2 may be implemented using one inductor for addition operation, and the non-adjacent harmonic component suppression unit 1050 may be implemented using an amplifier.

Fig. 11 illustrates a flow diagram of a transmitter in a wireless communication system, in accordance with various embodiments. Fig. 11 illustrates a method of operation of a transmitter including an oscillator 220. From a different perspective, fig. 11 may be understood as a method of operation of the oscillator 220.

Referring to fig. 11, in step 1101, the transmitter generates an oscillation signal in the form of a differential signal, for example, the transmitter may generate an oscillation signal using P LL and convert the oscillation signal into a differential signal, however, if the oscillation signal generated by P LL has the form of a differential signal, the operation of converting a single signal into a differential signal may be omitted.

In step 1103, the transmitter multiplies the frequency of the first signal and the second signal, which constitute the differential signal. That is, by multiplying the first signal and the second signal, the transmitter generates a first signal set including harmonic components of the first signal and a second signal set including harmonic components of the second signal. As such, all components of the first signal set may have a positive (+) phase, some components of the second signal set may have a positive (+) phase, and the remaining components may have a negative (-) phase.

In step 1105, the transmitter generates a signal in which at least one harmonic component adjacent to the desired frequency component is suppressed with the multiplied signal. Specifically, the transmitter linearly operates on the frequency-multiplied signal. According to various embodiments, the transmitter performs an addition operation or a subtraction operation on the first signal and the second signal, and thus suppresses at least one harmonic component adjacent to a component corresponding to the desired multiplier value. At this time, an appropriate weight may be applied to the first signal or the second signal. For example, if the expected multiplier is an odd number, the transmitter may perform a subtraction operation. As another example, the transmitter may perform an addition operation if the expected multiplier is an even number.

Next, although not shown in fig. 11, the transmitter may suppress at least one non-adjacent harmonic component. For this purpose, the transmitter may use the filtering characteristics of an amplifier, or may use a separate band-pass filter. An oscillating signal of a desired frequency is provided to the RF circuit and may be used for frequency conversion of the transmit signal.

According to the various embodiments as described above, adjacent harmonic components that are difficult to remove when a frequency multiplier is used can be effectively suppressed. In this context, suppressing includes not only removing a value but also reducing it to a size smaller than a certain threshold. Although the output filter or amplifier is not designed in a narrow band to obtain good filtering characteristics, the oscillation technique according to various embodiments helps to expand the operating frequency range of the frequency multiplier. Therefore, unnecessary harmonic components due to the frequency multiplier are suppressed, so that the burden of designing the entire system can be greatly reduced.

The method according to the embodiments described in the claims or the specification of the present disclosure may be implemented in software, hardware, or a combination of hardware and software.

For software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium may be configured to be executed by one or more processors of the electronic device. The one or more programs may include instructions for controlling an electronic device to perform a method according to embodiments described in the claims or specification of the present disclosure.

Such programs (software modules, software) may be stored in random access memory, non-volatile memory (including flash memory), Read Only Memory (ROM), electrically erasable programmable ROM (eeprom), magneto-optical disk storage, Compact Disc (CD) -ROM, Digital Versatile Discs (DVD) or other optical storage devices, and magnetic cassettes. Alternatively, it may be stored in a memory in which a part or all of these recording media are combined. Multiple memories may be included.

Also, the programs may be stored in a connectable storage device accessible through a communication network (e.g., the Internet, AN intranet, a local area network (L AN), a wide area network (W L AN), or a Storage Area Network (SAN), or a communication network combining these networks).

In certain embodiments of the present disclosure, elements included in the present disclosure are expressed in a singular form or a plural form. However, for convenience of explanation, the singular or plural expressions are appropriately selected according to the proposed cases, the present disclosure is not limited to a single element or a plurality of elements, elements expressed in the plural form may be configured as a single element, and elements expressed in the singular form may be configured as a plurality of elements.

Meanwhile, although specific embodiments have been described in the description of the present disclosure, it should be noted that various changes may be made without departing from the scope of the present disclosure. Accordingly, the scope of the present disclosure is not to be limited and limited by the described embodiments, and is to be defined not only by the scope of the following claims, but also by equivalents thereof.