阅读说明：本技术 一种基于推挽调制器的电矢量毫米波生成系统及方法 (It is a kind of that system and method is generated based on the electric vector millimeter wave for recommending modulator ) 是由 赵峰 余建军 于 2019-08-08 设计创作，主要内容包括：本发明公开了一种基于推挽调制器的电矢量毫米波生成系统及方法,电矢量毫米波生成系统包括数字信号处理器、外腔激光器、推挽调制器和直流偏置电压源；数字信号处理器的输出端接有第一模数转换器和第二模数转换器,第一模数转换器和第二模数转换器的输出端分别接有第一射频驱动器和第二射频驱动器,推挽调制器中的第一相位调制器和第二相位调制器分别与第一射频驱动器和第二射频驱动器的输出端连接,推挽调制器的输出端依次接有光放大器、光滤波器、光电探测器和毫米波放大器,毫米波放大器的输出端接有用于发射电矢量毫米波信号的天线。本发明能够有效应用在ROF通信中,生成无线的电矢量毫米波信号,使用效果好,便于推广使用。(System and method is generated based on the electric vector millimeter wave for recommending modulator the invention discloses a kind of, electric vector millimeter wave generates system and includes digital signal processor, outside cavity gas laser, recommends modulator and bias DC voltage source；The output of digital signal processor is terminated with the first analog-digital converter and the second analog-digital converter, the output end of first analog-digital converter and the second analog-digital converter is connected to the first radio driver and the second radio driver respectively, the first phase modulator and second phase modulator recommended in modulator are connect with the output end of the first radio driver and the second radio driver respectively, the output end for recommending modulator is successively connected to image intensifer, optical filter, photodetector and millimeter wave amplifier, the output of millimeter wave amplifier is terminated with the antenna for emitting electric vector millimeter-wave signal.The present invention can be applied effectively in ROF communication, generate wireless electric vector millimeter-wave signal, and using effect is good, convenient for promoting the use of.)

1. a kind of generate system based on the electric vector millimeter wave for recommending modulator, it is characterised in that: including digital signal processor (1), outside cavity gas laser (2) and what is connect with the output end of outside cavity gas laser (2) recommend modulator, and connect with modulator is recommended The bias DC voltage source (3) connect；The output of the digital signal processor (1) is terminated with the first analog-digital converter (4) and The output of two analog-digital converters (5), first analog-digital converter (4) is terminated with the first radio driver (6), second mould The output of number converter (5) is terminated with the second radio driver (7), first for recommending modulator and including mutual symmetrical operation Phase-modulator (8) and second phase modulator (9), the first phase modulator (8) are defeated with the first radio driver (6) Outlet connection, the second phase modulator (9) connect with the output end of the second radio driver (7), described to recommend modulator Output be terminated with image intensifer (10), the output of the image intensifer (10) is terminated with optical filter (11), light filtering The output of device (11) is terminated with photodetector (12), and the output of the photodetector (12) is terminated with millimeter wave amplifier (13), the output of the millimeter wave amplifier (13) is terminated with the day for electric vector millimeter-wave signal to be emitted to free space Line (14).

2. described in accordance with the claim 1 a kind of based on the electric vector millimeter wave generation system for recommending modulator, it is characterised in that: The image intensifer (10) is erbium-doped fiber amplifier.

3. described in accordance with the claim 1 a kind of based on the electric vector millimeter wave generation system for recommending modulator, it is characterised in that: The antenna (14) is Cassegrain antenna.

4. described in accordance with the claim 1 a kind of based on the electric vector millimeter wave generation system for recommending modulator, it is characterised in that: Between the first phase modulator (8) and bias DC voltage source (3) and second phase modulator (9) and direct current biasing Voltage source is all made of cable connection between (3).

5. described in accordance with the claim 1 a kind of based on the electric vector millimeter wave generation system for recommending modulator, it is characterised in that: The outside cavity gas laser (2) and recommend between modulator, recommend between modulator and image intensifer (10), image intensifer (10) with Between optical filter (11), between optical filter (11) and photodetector (12) and photodetector (12) and millimeter wave Single mode optical fiber connection is all made of between amplifier (13).

6. described in accordance with the claim 1 a kind of based on the electric vector millimeter wave generation system for recommending modulator, it is characterised in that: Between the digital signal processor (1) and the first analog-digital converter (4) and the second analog-digital converter (5), the first analog-to-digital conversion Between device (4) and the first radio driver (6), between the second analog-digital converter (5) and the second radio driver (7), first penetrate Between frequency driver (6) and first phase modulator (8) and the second radio driver (7) and second phase modulator (9) it Between be all made of coaxial cable for high frequency connection.

7. a kind of method for carrying out the generation of electric vector millimeter wave using system as described in claim 1, it is characterised in that: this method The following steps are included:

Step 1: the digital signal processor (1) generates complex signal Data, and complex signal Data is separated into real part number Word signal and imaginary part digital signal；

Step 2: the real part digital signal of complex signal Data is converted to analog signal by first analog-digital converter (4)；Institute It states the second analog-digital converter (5) and the imaginary part digital signal of complex signal Data is converted into analog signal；

Step 3: the real part analog signal of signal Data is transferred to after being amplified by the first radio driver (6) recommends modulator First phase modulator (8) in；The imaginary analog signal of signal Data is transferred to after being amplified by the second radio driver (7) It recommends in the second phase modulator (9) of modulator；

Step 4: outside cavity gas laser (2) the generation continuous laser signal is transferred to by single mode optical fiber and is recommended in modulator, even Continuous laser signal is divided into the continuous optical signal in road and the lower continuous optical signal in road；

Step 5: the upper continuous optical signal transmission in road is in first phase modulator (8), by the real part analog signal tune of signal Data System；The lower continuous optical signal transmission in road is modulated in second phase modulator (9) by the imaginary analog signal of signal Data；

Step 6: modulated two ways of optical signals, in the output end superposition for recommending modulator, superimposed signal indicates are as follows:

Wherein, R is the photoelectric respone coefficient for recommending modulator, and Real (Data) is the plural form generated after Digital Signal Processing The real part of modulating vector signal, Imaga (Data) are the void of the plural form modulating vector signal generated after Digital Signal Processing Portion, i are imaginary number, and A is DC voltage, and B is the vector signal of baseband modulation, w₁For the angular frequency of subcarrier 1, w₂For subcarrier 2 Angular frequency, t are the time, and e is the bottom of natural logrithm, and DC is the light output for recommending modulator in no modulated signal；

Step 7: the optical signal transmission after recommending modulator in image intensifer (10), carries out signal amplification；

Step 8: carrying out filtered optical signal by image intensifer (10) amplified optical signal transmission in optical filter (11)；

Step 9: photoelectric conversion is carried out by optical filter (11) filtered optical signal transmission in photodetector (12), It is electric vector millimeter-wave signal that the beat signal that beat effect generates occurs when photoelectric conversion；

Step 10: being transferred to millimeter wave amplifier (13) by the electric vector millimeter-wave signal that photodetector (12) is converted to In, carry out the amplification of electric vector millimeter-wave signal；

Step 11: being transmitted by the amplified electric vector millimeter-wave signal of millimeter wave amplifier (13) by coaxial cable for high frequency To antenna (14), electric vector millimeter-wave signal is emitted to free space using antenna (14), obtains wireless electric vector millimeter Wave signal.

Technical field

The invention belongs to fields of communication technology, and in particular to a kind of to generate system based on the electric vector millimeter wave for recommending modulator System and method.

Background technique

Fiber optic communication has the characteristics that transmission range is long, message capacity is big, but due to wire transmission, cannot achieve broadly Domain covers comprehensively, and full region covering theoretically may be implemented in wireless communication, but is limited to frequency spectrum resource, transmission capacity and transmission Apart from limited.Bearing optical fiber radio frequency (Radio-over-fiber, ROF) combines the advantages of fiber optic communication and wireless communication, tool Have that transmission range is long, transmission capacity is big, can be with mobile terminal real time communication.W-waveband (75GHz-110GHz) and terahertz wave band (100GHz-10THz) has biggish spectral bandwidth, and is easy to generate electric vector signal using photoelectricity hybrid mode, in ROF Preliminary application has been obtained in system.In the prior art, ultra wide band is had been realized in by single sideband modulation using I/Q modulator ROF system application, still, since the insertion loss of I/Q modulator is big, DC offset voltage point is more, generally three, to light The power loss of signal is larger, it is also necessary to carry out relaying amplification to optical signal in systems.

Summary of the invention

It is based on recommending in view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing one kind The electric vector millimeter wave of modulator generates system, and structure is simple, and rationally, it is convenient to realize for design, can effectively apply logical in ROF In letter, wireless electric vector millimeter-wave signal is generated, reduces optical signal power loss, using effect is good, convenient for promoting the use of.

In order to solve the above technical problems, the technical solution adopted by the present invention is that: it is a kind of based on the electric vector for recommending modulator Millimeter wave generates system, recommends including digital signal processor, outside cavity gas laser and with what the output end of outside cavity gas laser was connect Modulator, and with the bias DC voltage source recommending modulator and connect；The output of the digital signal processor is terminated with One analog-digital converter and the second analog-digital converter, the output of first analog-digital converter are terminated with the first radio driver, institute The output for stating the second analog-digital converter is terminated with the second radio driver, for recommending modulator and including mutual symmetrical operation One phase-modulator and second phase modulator, the first phase modulator are connect with the output end of the first radio driver, The second phase modulator is connect with the output end of the second radio driver, and the output for recommending modulator is terminated with light and puts Big device, the output of the image intensifer are terminated with optical filter, and the output of the optical filter is terminated with photodetector, described The output of photodetector is terminated with millimeter wave amplifier, and the output of the millimeter wave amplifier is terminated with for by electric vector milli Metric wave signal is emitted to the antenna of free space.

Above-mentioned is a kind of based on the electric vector millimeter wave generation system for recommending modulator, and the image intensifer is Er-doped fiber Amplifier.

Above-mentioned is a kind of based on the electric vector millimeter wave generation system for recommending modulator, and the antenna is Cassegrain day Line.

It is above-mentioned it is a kind of system is generated based on the electric vector millimeter wave for recommending modulator, the first phase modulator and straight Cable connection is all made of between stream bias voltage source and between second phase modulator and bias DC voltage source.

It is above-mentioned it is a kind of system is generated based on the electric vector millimeter wave for recommending modulator, the outside cavity gas laser and recommend tune Between device processed, recommend between modulator and image intensifer, between image intensifer and optical filter, optical filter and photodetector Between and photodetector and millimeter wave amplifier between be all made of single mode optical fiber connection.

It is above-mentioned it is a kind of system is generated based on the electric vector millimeter wave for recommending modulator, the digital signal processor and the Between one analog-digital converter and the second analog-digital converter, between the first analog-digital converter and the first radio driver, the second modulus Between converter and the second radio driver, between the first radio driver and first phase modulator and the second radio frequency drive Coaxial cable for high frequency connection is all made of between dynamic device and second phase modulator.

The invention also discloses it is a kind of based on recommend modulator electric vector millimeter wave generate method, this method include with Lower step:

Step 1: the digital signal processor generates complex signal Data, and complex signal Data is separated into real part Digital signal and imaginary part digital signal；

Step 2: the real part digital signal of complex signal Data is converted to analog signal by first analog-digital converter； The imaginary part digital signal of complex signal Data is converted to analog signal by second analog-digital converter；

Step 3: the real part analog signal of signal Data is transferred to after being amplified by the first radio driver recommends modulator First phase modulator in；The imaginary analog signal of signal Data is transferred to after being amplified by the second radio driver and recommends tune In the second phase modulator of device processed；

Step 4: the outside cavity gas laser generation continuous laser signal is transferred to by single mode optical fiber and is recommended in modulator, Continuous laser signal is divided into the continuous optical signal in road and the lower continuous optical signal in road；

Step 5: the upper continuous optical signal transmission in road is into first phase modulator, by the real part analog signal of signal Data Modulation；The lower continuous optical signal transmission in road is modulated into second phase modulator by the imaginary analog signal of signal Data；

Step 6: modulated two ways of optical signals, in the output end superposition for recommending modulator, superimposed signal indicates are as follows:

Wherein, R is the photoelectric respone coefficient for recommending modulator, and Real (Data) is the plural number generated after Digital Signal Processing The real part of form modulating vector signal, Imaga (Data) are the plural form modulating vector signal that generates after Digital Signal Processing Imaginary part, i is imaginary number, and A is DC voltage, and B is the vector signal of baseband modulation, w₁For the angular frequency of subcarrier 1, w₂For sub- load The angular frequency of wave 2, t are the time, and e is the bottom of natural logrithm, and DC is the light output for recommending modulator in no modulated signal；

Step 7: the optical signal transmission after recommending modulator into image intensifer, carries out signal amplification；

Step 8: carrying out filtered optical signal by the amplified optical signal transmission of image intensifer into optical filter；

Step 9: carrying out photoelectric conversion, photoelectricity by the filtered optical signal transmission of optical filter into photodetector It is electric vector millimeter-wave signal that the beat signal that beat effect generates occurs when conversion；

Step 10: the electric vector millimeter-wave signal being converted to by photodetector is transferred in millimeter wave amplifier, Carry out the amplification of electric vector millimeter-wave signal；

Step 11: being transmitted by the amplified electric vector millimeter-wave signal of millimeter wave amplifier by coaxial cable for high frequency To antenna, electric vector millimeter-wave signal is emitted to free space using antenna, obtains wireless electric vector millimeter-wave signal.

Compared with the prior art, the present invention has the following advantages:

1, electric vector millimeter wave of the invention generation system structure is simple, and rationally, it is convenient to realize for design.

2, the present invention substitutes traditional I/Q modulator using modulator is recommended, and realizes the generation of electric vector millimeter wave, recommends Modulator only needs a DC offset voltage, and insertion loss is the one third of I/Q modulator, is guaranteeing bandwidth free of losses premise Under, control is simple, reduces optical signal power loss.

3, the present invention can be applied effectively in ROF communication, generate wireless electric vector millimeter-wave signal, using effect It is good, convenient for promoting the use of.

In conclusion electric vector millimeter wave of the invention generates, system structure is simple, and rationally, it is convenient to realize for design, can It effectively applies in ROF communication, generates wireless electric vector millimeter-wave signal, reduce optical signal power loss, using effect is good, Convenient for promoting the use of.

Below by drawings and examples, technical scheme of the present invention will be described in further detail.

Detailed description of the invention

Fig. 1 is that electric vector millimeter wave of the invention generates system principle diagram.

Description of symbols:

1-digital signal processor；2-outside cavity gas lasers；3-bias DC voltage sources；

4-the first analog-digital converter；5-the second analog-digital converter；6-the first radio driver；

7-the second radio driver；8-first phase modulators；9-second phase modulators；

10-image intensifers；11-optical filters；12-photodetectors；

13-millimeter wave amplifiers；14-antennas.

Specific embodiment

As shown in Figure 1, of the invention generated at system, including digital signal based on the electric vector millimeter wave for recommending modulator Reason device 1, outside cavity gas laser 2 and what is connect with the output end of outside cavity gas laser 2 recommend modulator, and connect with modulator is recommended Bias DC voltage source 3；The output of the digital signal processor 1 is terminated with the first analog-digital converter 4 and the second modulus turns Parallel operation 5, the output of first analog-digital converter 4 are terminated with the first radio driver 6, second analog-digital converter 5 it is defeated It is terminated with the second radio driver 7 out, it is described to recommend the first phase modulator 8 and second that modulator includes mutual symmetrical operation Phase-modulator 9, the first phase modulator 8 are connect with the output end of the first radio driver 6, the second phase modulation Device 9 is connect with the output end of the second radio driver 7, and the output for recommending modulator is terminated with image intensifer 10, the light The output of amplifier 10 is terminated with optical filter 11, and the output of the optical filter 11 is terminated with photodetector 12, the light The output of electric explorer 12 is terminated with millimeter wave amplifier 13, and the output of the millimeter wave amplifier 13 is terminated with for by electric vector Amount millimeter-wave signal is emitted to the antenna 14 of free space.