阅读说明：本技术 分布式接收机的信号解调系统、方法及计算机存储介质 (Signal demodulation system, method and computer storage medium for distributed receiver ) 是由 何仲夏 刘锦霖 陈国胜 梁稳 于 2019-09-20 设计创作，主要内容包括：本发明提供一种分布式接收机的信号解调系统、方法、电压比较器及计算机存储介质,包括发射端、远端和集中处理端,远端和集中处理端通过双向光纤连接,远端通过天线接收发射端传输的高阶调制信号,经过差分电光转换器将电信号转换为光信号,传输至集中处理端,集中处理端利用比较门限生成的周期性的比较门限电压波形获取信号数据跳变位置处对应的信号数值,输出采样值,进一步转换为单比特高速信号,利用差分电光转换器将光信号转换为电信号,最后利用带通滤波器恢复为原始调制信号进行传输。本发明的技术方案利用单比特电压比较器虚拟出多比特电压比较器的效果,实现高阶调制信号的解调,适合高频调谐信号的信号解调。(The invention provides a signal demodulation system and a method of a distributed receiver, a voltage comparator and a computer storage medium, wherein the signal demodulation system comprises a transmitting end, a far end and a centralized processing end, the far end and the centralized processing end are connected through a bidirectional optical fiber, the far end receives a high-order modulation signal transmitted by the transmitting end through an antenna, an electric signal is converted into an optical signal through a differential electro-optical converter and transmitted to the centralized processing end, the centralized processing end acquires a signal value corresponding to a signal data jumping position by using a periodic comparison threshold voltage waveform generated by a comparison threshold, outputs a sampling value and further converts the sampling value into a single-bit high-speed signal, the optical signal is converted into the electric signal by using the differential electro-optical converter, and finally, the electric signal is recovered to an original modulation signal by. The technical scheme of the invention realizes the demodulation of high-order modulation signals by virtualizing the effect of the multi-bit voltage comparator by using the single-bit voltage comparator, and is suitable for the signal demodulation of high-frequency tuning signals.)

1. A signal demodulation system of a distributed receiver comprises a low-pass filter and a differential electro-optical converter, and is characterized by further comprising a transmitting end, a far end and a centralized processing end, wherein the far end and the centralized processing end are connected through an optical fiber;

the far end receives a high-order modulation signal transmitted by the transmitting end through an antenna, converts an electric signal into an optical signal through a differential electro-optical converter and transmits the optical signal to the centralized processing end;

the centralized processing end utilizes the comparison threshold voltage waveform generated by the comparison threshold of the transmitting end to obtain a signal value corresponding to the jump position of the optical signal data, outputs a sampling value, further converts the sampling value into a single-bit high-speed signal, utilizes a differential electro-optical converter to convert the optical signal into an electric signal, and utilizes a band-pass filter to restore the electric signal into an original modulation signal for transmission.

2. The signal demodulation system of the distributed receiver as claimed in claim 1, wherein the optical signal represents 1 when the positive input voltage of the data transition position is higher than the negative terminal, and the optical signal represents 0 otherwise.

3. The signal demodulation system for a distributed receiver as set forth in claim 1, wherein said optical fiber is a bi-directional optical fiber.

4. The signal demodulation system of the distributed receiver as claimed in claim 1, wherein said comparison threshold voltage waveform varies in real time according to the intensity of the higher order modulated signal.

5. The signal demodulation system for a distributed receiver as set forth in claim 1 wherein said comparison threshold voltage waveform is a periodic sine wave or a sawtooth waveform.

6. A signal demodulation method, comprising the steps of:

receiving a high-order modulation signal and inputting the high-order modulation signal to a voltage comparator;

converting the electrical signal into an optical signal and transmitting the optical signal to a voltage comparator;

comparing the high-order modulation signal with a comparison threshold voltage waveform;

acquiring a signal value corresponding to the position of a signal cross point of the high-order modulation signal and the comparison threshold voltage waveform, and acquiring a voltage value of the high-order modulation signal;

converting the voltage value of the high-order modulation signal into a single-bit high-speed signal, and converting the optical signal into an electric signal;

the electrical signal is restored to the original modulated signal using a band pass filter.

7. The signal demodulation method of claim 6 wherein the higher order modulated signal is received via an antenna.

8. The signal demodulation method of claim 6 wherein said comparison threshold voltage waveform varies in real time in response to the magnitude of the higher order modulated signal.

9. The method of claim 6, wherein the comparison threshold voltage waveform is a periodic sine wave or a sawtooth waveform.

10. A voltage comparator which performs a signal demodulation method according to any one of claims 6 to 9 when performing signal processing.

11. A computer storage medium, characterized in that it comprises one or more computer programs, stored in said computer storage medium, and configured to be executed by said one or more processors, which when executing said computer programs implement the steps of performing the signal demodulation method as provided in any of claims 6-9.

[ technical field ] A method for producing a semiconductor device

The invention belongs to the field of signal demodulation, and particularly relates to a signal demodulation system and method of a distributed receiver, a voltage comparator and a computer storage medium.

[ background of the invention ]

Amplitude-phase modulation is often used in digital communication and radar systems to transmit signals or sense objects, and an analog-to-digital signal converter is very important in the systems, but an analog-to-digital converter is often used in cooperation with a digital signal processor and consumes a certain amount of electric energy. In distributed multi-antenna communication and radar systems, the receivers are often distributed at different locations and interconnected synchronously by optical fibers, and it is common practice to digitize analog signals at the receiving antenna end by an analog-to-digital signal converter and transmit the digitized signals over optical fibers.

U.S. patent No. 7885359 to the fine epson corporation, the patent name: sampling demodulator for Amplitude Shift Keying (ASK) radio receiver, which discloses a Sampling demodulator for an Amplitude Shift Keying (ASK) radio receiver, ASK being a relatively simple demodulation scheme in which the carrier amplitude varies with the demodulated signal, ASK being equivalent to amplitude modulation in an analog signal, although it mentions that ASK demodulated signal can be sampled as a binary bit stream using a single comparator with a regulated voltage, there is no processing capability for the phase modulated signal, thus limiting the available modulation schemes

Therefore, it is necessary to develop a signal demodulation method and apparatus suitable for high frequency tuning signals.

[ summary of the invention ]

In order to solve the above problems, the present invention provides a signal demodulation system, method, comparator and computer storage medium of a distributed receiver.

The technical scheme of the invention is as follows:

in a first aspect, the invention provides a signal demodulation system of a distributed receiver, which comprises a low-pass filter, a differential electro-optical converter, a transmitting end, a far end and a centralized processing end, wherein the far end and the centralized processing end are connected through an optical fiber;

the far end receives a high-order modulation signal transmitted by the transmitting end through an antenna, converts an electric signal into an optical signal through a differential electro-optical converter and transmits the optical signal to the centralized processing end;

the centralized processing end obtains a signal value corresponding to a jump position of optical signal data by using a comparison threshold voltage waveform generated by a comparison threshold of the transmitting end, outputs a sampling value, further converts the sampling value into a single-bit high-speed signal, converts the optical signal into an electric signal by using a differential electro-optical converter, and recovers the electric signal into an original modulation signal by using a band-pass filter for transmission.

Further, when the positive input voltage of the data transition position is higher than the negative terminal, the optical signal is represented as 1, whereas the optical signal is represented as 0.

Further, the optical fiber is a bidirectional optical fiber.

Furthermore, the comparison threshold voltage waveform changes in real time according to the intensity of the high-order modulation signal.

Further, the comparison threshold voltage waveform may be a periodic sine wave or a sawtooth wave.

In a second aspect, the present invention provides a signal demodulation method, including the steps of:

receiving a high-order modulation signal and inputting the high-order modulation signal to a voltage comparator;

converting the electrical signal into an optical signal and transmitting the optical signal to a voltage comparator;

comparing the high-order modulation signal with a comparison threshold voltage waveform;

acquiring a signal value corresponding to the position of a signal cross point of the high-order modulation signal and the comparison threshold voltage waveform, and acquiring a voltage value of the high-order modulation signal;

converting the voltage value of the high-order modulation signal into a single-bit high-speed signal, converting the optical signal into an electric signal, and recovering the electric signal into an original modulation signal by using a band-pass filter for transmission;

the electrical signal is restored to the original communication signal using a band pass filter.

Further, the high order modulated signal is received through an antenna.

Furthermore, the comparison threshold voltage waveform changes in real time according to the intensity of the high-order modulation signal.

Further, the comparison threshold voltage waveform may be a periodic sine wave or a sawtooth wave.

In a third aspect, the present invention provides a voltage comparator, which performs the signal demodulation method according to the second aspect of the present invention when performing signal processing.

In a fourth aspect, the present invention provides a computer storage medium comprising one or more computer programs stored in the computer storage medium and configured to be executed by the one or more processors, which when executing the computer programs implement the steps of performing the signal demodulation method provided by the second aspect of the present invention.

The signal demodulation system, the signal demodulation method, the voltage comparator and the computer storage medium can directly collect and intensively process communication signals by using the optical fiber, so that the power consumption of a far-end receiver is greatly reduced, the complete synchronization of all the receivers can be ensured, and meanwhile, a high-order modulation signal is compared with a comparison threshold voltage waveform by using a periodic comparison threshold voltage waveform generated by a comparison threshold at an intensively processing end, so that the effect of the multi-bit voltage comparator is virtualized, the demodulation of the high-order modulation signal is realized, and the signal demodulation system is suitable for the signal demodulation of the high-frequency tuning signal.

[ description of the drawings ]

FIG. 1: the invention discloses a signal demodulation system block diagram.

FIG. 2: the invention discloses a signal demodulation method flow chart.

FIG. 3: the present invention is a schematic diagram of a computer storage medium.

FIG. 4: the standard sinusoidal signal and the high-order modulation signal waveform of the embodiment of the invention are compared.

FIG. 5: the invention is illustrated in fig. 4 by the transition position of signal data.

FIG. 6: a signal data transition location diagram according to another embodiment of the present invention.

[ detailed description ] embodiments

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and while the invention will be described in connection with the preferred embodiments, it will be understood by those skilled in the art that these embodiments are not intended to limit the invention to these embodiments, but on the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details, and in other instances, well-known methods, procedures, components and circuits have not been described in detail.

Referring to fig. 1, a block diagram of a signal demodulation system according to the present invention is shown, the signal demodulation system is composed of a transmitting end 10, a far end 20 and a centralized processing end 30, and the far end 20 and the centralized processing end 30 are connected by a bidirectional optical fiber. The RX + terminal of the far end 20 receives a high-order modulated signal through an antenna, and the antenna herein should be understood in a broad sense, and converts an electrical signal into an optical signal by using a differential electrical-to-optical converter (not shown in the figure) of a differential-to-single-ended unit, where the optical signal is represented as 1 when the positive input voltage is higher than the negative terminal, and the optical signal is represented as 0 otherwise.

The optical signal is transmitted to the centralized processing end 30 through the optical fiber, the centralized processing end 30 generates a binary 10-sequence bit stream and transmits the binary 10-sequence bit stream to the far end 20, the 10-sequence bit stream generates a comparison threshold voltage waveform at the centralized processing end 30 through a comparison threshold of the transmitting end 10, the comparison threshold of the transmitting end 10 can change in real time according to the strength of the high-order modulation signal, correspondingly, the comparison threshold voltage waveform generated at the centralized processing end 30 also changes continuously, and the comparison threshold voltage waveform here can be a periodic sine wave or a periodic sawtooth wave. The comparison threshold of the transmitting terminal 10 is connected to the RX-terminal of the far end 20, and by generating a constantly changing comparison threshold voltage waveform, the comparator in the far end 20 compares the high-order modulation signal with different voltage amplitudes, so as to virtualize the effect of the multi-bit comparator, and implement demodulation of the high-order modulation signal.

At the centralized processing end 30, the collected 10-sequence bit stream is processed in a centralized manner, when 0 and 1 jump occurs, the waveform amplitude of the comparison threshold voltage generated by the representative is interlaced with the input signal, a sampling value is output according to the sine wave value corresponding to the acquired data jump position, the sampling value is further converted into a single-bit high-speed signal, an optical signal is converted into an electrical signal by an electro-optical converter (not shown in the figure) of the single-ended to differential unit, and the electrical signal is further recovered into an original modulation signal by a band-pass filter for transmission.

Since the comparison threshold voltage waveform in the technical scheme of the present invention is generated at the centralized processing terminal 30, the centralized processing terminal 30 can obtain the amplitude of the signal received by the far end 20 by comparing the comparison threshold voltage waveform with the data transition position of the high-order modulation signal.

Referring to fig. 2, a flowchart of a signal demodulation method according to the present invention includes the following steps:

step 201, receiving a high-order modulation signal and inputting the high-order modulation signal to a voltage comparator;

step 202, converting the electrical signal into an optical signal, and using a differential electro-optical converter as a single-bit voltage comparator;

step 203, generating a comparison threshold voltage waveform by using the comparison threshold, and comparing and sampling the high-order modulation signal and the comparison threshold voltage waveform;

step 204, acquiring a signal value corresponding to the position of a signal cross point of the high-order modulation signal and the comparison threshold voltage waveform, and acquiring a voltage value of the high-order modulation signal;

step 205, converting the voltage value of the high-order modulation signal into a single-bit high-speed signal, further converting the optical signal into an electrical signal for transmission, and outputting a demodulation signal;

the electrical signal is restored to the original modulated signal using a band pass filter, step 206.

Particularly, the comparison threshold may change in real time according to the strength of the high-order modulation signal, and correspondingly, the comparison threshold voltage waveform may also change continuously, where the comparison threshold voltage waveform may be a periodic sine wave or a periodic sawtooth wave.

The present invention also provides a voltage comparator, which directly collects and centrally processes signals at the centralized processing end 30 by using optical fibers, so that the power consumption of the remote receiver is greatly reduced, and the complete synchronization of the contents received by all the receivers can be realized.

Referring to fig. 3, the present invention also provides a computer storage medium 302, the computer storage medium 302 comprising one or more computer programs, the one or more computer programs being stored in the computer storage medium 302 and configured to be executed by the one or more processors 301, the processor 301 implementing the steps of a signal demodulation method as provided in fig. 2 of the present invention when executing the computer programs.

Referring to fig. 4 to 6, a comparison graph of the threshold voltage waveform and the high-order modulation signal waveform according to the embodiment of the present invention is shown in fig. 4, in which the dashed line waveform is the comparison threshold voltage waveform, the solid line is the high-order modulation signal waveform, and the intersection point of the two waveforms is the signal transition position; further as shown in fig. 5 and fig. 6, which are schematic diagrams of signal data transition positions according to an embodiment of the present invention, a vertical black solid line at an intersection of a black high-order modulation signal inclined upward in fig. 5 and a comparison threshold voltage waveform indicated by a dashed line represents a signal transition position, and in order to more intuitively and clearly illustrate the essence of the present invention, a signal transition position example shown in fig. 6 is further provided, an intersection of a high-order modulation signal waveform indicated by a black line inclined upward in fig. 6 and a comparison threshold voltage waveform indicated by a dashed line represents a high voltage and a low voltage, and is converted into a binary code, i.e., 010101010101, a black horizontal line in fig. 6 is a collected equivalent analog signal, and the analog signal can be restored into an original demodulation signal through a band-pass filter (not shown in the figure).

By adopting the signal demodulation system, the signal demodulation method, the voltage comparator and the computer storage medium, communication signals can be directly collected and processed in a centralized way by utilizing the optical fiber, so that the power consumption of a far-end receiver is greatly reduced, the complete synchronization of all the receivers can be ensured, meanwhile, a comparison threshold voltage waveform is generated at the centralized processing end by utilizing a comparison threshold, and a high-order modulation signal is compared with different voltage amplitudes by adopting the voltage comparator, so that the effect of the multi-bit voltage comparator is virtualized, and the demodulation of the high-order modulation signal is realized.

In the embodiment of the present invention, it can be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiment may be implemented by instructing the relevant hardware through a program, where the program may be stored in a computer-readable storage medium, and the storage medium may include storage media such as ROM/RAM, magnetic disk, optical disk and the like, which are common to those skilled in the art.