CN110505016B - Electric vector millimeter wave generation method based on push-pull modulator - Google Patents
Electric vector millimeter wave generation method based on push-pull modulator Download PDFInfo
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Abstract
The invention discloses an electric vector millimeter wave generating method based on a push-pull modulator, wherein an electric vector millimeter wave generating system comprises a digital signal processor, an external cavity laser, the push-pull modulator and a direct current bias voltage source; the output end of the digital signal processor is connected with a first analog-to-digital converter and a second analog-to-digital converter, the output ends of the first analog-to-digital converter and the second analog-to-digital converter are respectively connected with a first radio frequency driver and a second radio frequency driver, a first phase modulator and a second phase modulator in a push-pull modulator are respectively connected with the output ends of the first radio frequency driver and the second radio frequency driver, the output end of the push-pull modulator is sequentially connected with an optical amplifier, an optical filter, a photoelectric detector and a millimeter wave amplifier, and the output end of the millimeter wave amplifier is connected with an antenna for transmitting electric vector millimeter wave signals. The invention can be effectively applied to ROF communication to generate wireless electric vector millimeter wave signals, has good use effect and is convenient for popularization and use.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to an electric vector millimeter wave generation method based on a push-pull modulator.
Background
The optical fiber communication has the characteristics of long transmission distance, large communication capacity and the like, but due to wired transmission, wide regional overall coverage cannot be realized, and the wireless communication can theoretically realize the regional coverage, but is limited to frequency spectrum resources, and the transmission capacity and the transmission distance of the optical fiber communication are limited. Radio-over-fiber (ROF) combines the advantages of optical fiber communication and wireless communication, has long transmission distance and large transmission capacity, and can communicate with a mobile terminal in real time. The W wave band (75GHz-110GHz) and the terahertz wave band (100GHz-10THz) have larger frequency spectrum bandwidth, and are easy to generate electric vector signals by using a photoelectric hybrid mode, so that the method is primarily applied to an ROF system. In the prior art, an ultra wide band ROF system has been implemented by using an IQ modulator through single sideband modulation, but the IQ modulator has large insertion loss, a large number of dc bias voltage points, generally three, large power loss of an optical signal, and needs to relay and amplify the optical signal in the system.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an electric vector millimeter wave generating system based on a push-pull modulator, which has a simple structure, a reasonable design, and a convenient implementation, can be effectively applied to ROF communication to generate a wireless electric vector millimeter wave signal, reduce the power loss of an optical signal, and has a good use effect and is convenient for popularization and use.
In order to solve the technical problems, the invention adopts the technical scheme that: an electric vector millimeter wave generating system based on a push-pull modulator comprises a digital signal processor, an external cavity laser, the push-pull modulator connected with the output end of the external cavity laser, and a direct current bias voltage source connected with the push-pull modulator; the output end of the digital signal processor is connected with a first analog-to-digital converter and a second analog-to-digital converter, the output end of the first analog-to-digital converter is connected with a first radio frequency driver, the output end of the second analog-to-digital converter is connected with a second radio frequency driver, the push-pull modulator comprises a first phase modulator and a second phase modulator operating in push-pull with respect to each other, the first phase modulator is connected with the output end of the first radio frequency driver, the second phase modulator is connected with the output end of the second radio frequency driver, the output end of the push-pull modulator is connected with an optical amplifier, the output end of the optical amplifier is connected with an optical filter, the output end of the optical filter is connected with a photoelectric detector, the output end of the photoelectric detector is connected with a millimeter wave amplifier, and the output end of the millimeter wave amplifier is connected with an antenna for transmitting the electric vector millimeter wave signal to a free space.
In the above electric vector millimeter wave generating system based on the push-pull modulator, the optical amplifier is an erbium-doped fiber amplifier.
In the above electric vector millimeter wave generating system based on the push-pull modulator, the antenna is a cassegrain antenna.
In the electric vector millimeter wave generating system based on the push-pull modulator, the first phase modulator and the direct current bias voltage source and the second phase modulator and the direct current bias voltage source are connected by cables.
In the electric vector millimeter wave generating system based on the push-pull modulator, the single-mode optical fibers are respectively connected between the external cavity laser and the push-pull modulator, between the push-pull modulator and the optical amplifier, between the optical amplifier and the optical filter, between the optical filter and the photoelectric detector, and between the photoelectric detector and the millimeter wave amplifier.
In the electric vector millimeter wave generating system based on the push-pull modulator, the digital signal processor and the first analog-to-digital converter, the first analog-to-digital converter and the second analog-to-digital converter, the first analog-to-digital converter and the first radio frequency driver, the second analog-to-digital converter and the second radio frequency driver, the first radio frequency driver and the first phase modulator, and the second radio frequency driver and the second phase modulator are connected by high-frequency coaxial cables.
The invention also discloses a method for generating the electric vector millimeter wave based on the push-pull modulator, which comprises the following steps:
step one, the digital signal processor generates a complex signal Data and separates the complex signal Data into a real part digital signal and an imaginary part digital signal;
step two, the first analog-to-digital converter converts the real part digital signal of the complex signal Data into an analog signal; the second analog-to-digital converter converts the imaginary part digital signal of the complex signal Data into an analog signal;
amplifying the real part analog signal of the signal Data through a first radio frequency driver and transmitting the amplified real part analog signal to a first phase modulator of the push-pull modulator; the imaginary part analog signal of the signal Data is amplified by a second radio frequency driver and then transmitted to a second phase modulator of the push-pull modulator;
step four, the continuous laser signals generated by the external cavity laser are transmitted to a push-pull modulator through a single mode fiber, and the continuous laser signals are divided into an upper path continuous optical signal and a lower path continuous optical signal;
step five, transmitting the on-line continuous optical signal to a first phase modulator, and modulating the on-line continuous optical signal by a real part analog signal of the signal Data; the downlink continuous optical signal is transmitted to a second phase modulator and is modulated by an imaginary part analog signal of the signal Data;
step six, superposing the modulated two paths of optical signals at the output end of the push-pull modulator, wherein the superposed signals are expressed as:
wherein, R is the photoelectric response coefficient of the push-pull modulator, real (data) is the real part of the complex form modulation vector signal generated after the digital signal processing, Imaga (data) is the imaginary part of the complex form modulation vector signal generated after the digital signal processing, i is an imaginary number, A is direct current voltage, B is the vector signal modulated by the base band, w is the carrier band modulation vector signal, and1is the angular frequency, w, of subcarrier 12Is the angular frequency of subcarrier 2, t is time, e is the base of the natural logarithm, DC is the optical output of the push-pull modulator when no modulation signal is present;
step seven, transmitting the optical signal after passing through the push-pull modulator to an optical amplifier for signal amplification;
step eight, transmitting the optical signal amplified by the optical amplifier to an optical filter for optical signal filtering;
step nine, transmitting the optical signal filtered by the optical filter to a photoelectric detector for photoelectric conversion, wherein a beat frequency signal generated by a beat frequency effect during photoelectric conversion is an electric vector millimeter wave signal;
step ten, transmitting the electric vector millimeter wave signal obtained through conversion by the photoelectric detector to a millimeter wave amplifier, and amplifying the electric vector millimeter wave signal;
step eleven, the electric vector millimeter wave signals amplified by the millimeter wave amplifier are transmitted to an antenna through a high-frequency coaxial cable, and the electric vector millimeter wave signals are transmitted to a free space through the antenna to obtain wireless electric vector millimeter wave signals.
Compared with the prior art, the invention has the following advantages:
1. the electric vector millimeter wave generating system has the advantages of simple structure, reasonable design and convenient realization.
2. The invention adopts the push-pull modulator to replace the traditional IQ modulator, realizes the generation of electric vector millimeter waves, only needs one direct current bias voltage for the push-pull modulator, has one third of insertion loss of the IQ modulator, is simple to control on the premise of ensuring no bandwidth loss, and reduces the power loss of optical signals.
3. The invention can be effectively applied to ROF communication to generate wireless electric vector millimeter wave signals, has good use effect and is convenient for popularization and use.
In conclusion, the electric vector millimeter wave generating system has the advantages of simple structure, reasonable design and convenient realization, can be effectively applied to ROF communication to generate wireless electric vector millimeter wave signals, reduces the power loss of optical signals, has good use effect and is convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic block diagram of an electric vector millimeter wave generating system of the present invention.
Description of reference numerals:
1-a digital signal processor; 2-external cavity laser; 3-a direct current bias voltage source;
4-a first analog-to-digital converter; 5-a second analog-to-digital converter; 6 — a first radio frequency driver;
7-a second radio frequency driver; 8-a first phase modulator; 9-a second phase modulator;
10-an optical amplifier; 11 — an optical filter; 12-a photodetector;
13-millimeter wave amplifier; 14-antenna.
Detailed Description
As shown in fig. 1, the electric vector millimeter wave generating system based on the push-pull modulator of the present invention includes a digital signal processor 1, an external cavity laser 2, a push-pull modulator connected to the output end of the external cavity laser 2, and a dc bias voltage source 3 connected to the push-pull modulator; the output end of the digital signal processor 1 is connected with a first analog-to-digital converter 4 and a second analog-to-digital converter 5, the output end of the first analog-to-digital converter 4 is connected with a first radio frequency driver 6, the output end of the second analog-to-digital converter 5 is connected with a second radio frequency driver 7, the push-pull modulator comprises a first phase modulator 8 and a second phase modulator 9 operating in push-pull with respect to each other, the first phase modulator 8 is connected to an output of the first radio frequency driver 6, the second phase modulator 9 is connected to an output of the second radio frequency driver 7, the output end of the push-pull modulator is connected with an optical amplifier 10, the output end of the optical amplifier 10 is connected with an optical filter 11, the output end of the optical filter 11 is connected with a photoelectric detector 12, the output end of the photoelectric detector 12 is connected with a millimeter wave amplifier 13, the output end of the millimeter wave amplifier 13 is connected with an antenna 14 for transmitting the electric vector millimeter wave signal to free space.
In specific implementation, the push-pull modulator is composed of a first phase modulator 8 and a second phase modulator 9 which are arranged at upper and lower positions, the first phase modulator 8 and the second phase modulator 9 mutually perform push-pull operation, when the push-pull modulator operates in a linear region, a direct current bias voltage source 3 is biased at an orthogonal point of the push-pull modulator, the push-pull modulator has 4 input ports and 1 output port, the external cavity laser 2, the direct current bias voltage source 3, the first radio frequency driver 6 and the second radio frequency driver 7 are respectively connected with the 4 input ports of the push-pull modulator, and the optical amplifier 10 is connected with the 1 output port of the push-pull modulator.
In this embodiment, the optical amplifier 10 is an erbium-doped fiber amplifier.
In this embodiment, the antenna 14 is a cassegrain antenna.
In this embodiment, the first phase modulator 8 and the dc bias voltage source 3, and the second phase modulator 9 and the dc bias voltage source 3 are connected by common cables.
In this embodiment, the single-mode optical fibers are used for connecting between the external cavity laser 2 and the push-pull modulator, between the push-pull modulator and the optical amplifier 10, between the optical amplifier 10 and the optical filter 11, between the optical filter 11 and the photodetector 12, and between the photodetector 12 and the millimeter wave amplifier 13.
In this embodiment, the digital signal processor 1 and the first analog-to-digital converter 4 and the second analog-to-digital converter 5, the first analog-to-digital converter 4 and the first radio frequency driver 6, the second analog-to-digital converter 5 and the second radio frequency driver 7, the first radio frequency driver 6 and the first phase modulator 8, and the second radio frequency driver 7 and the second phase modulator 9 are all connected by high frequency coaxial cables.
The method for generating the electric vector millimeter wave based on the push-pull modulator comprises the following steps:
step one, the digital signal processor 1 generates a complex signal Data and separates the complex signal Data into a real part digital signal and an imaginary part digital signal;
step two, the first analog-to-digital converter 4 converts the real part digital signal of the complex signal Data into an analog signal; the second analog-to-digital converter 5 converts the imaginary part digital signal of the complex signal Data into an analog signal;
thirdly, amplifying the real part analog signal of the signal Data through a first radio frequency driver 6 and transmitting the amplified signal to a first phase modulator 8 of the push-pull modulator; the imaginary part analog signal of the signal Data is amplified by a second radio frequency driver 7 and then transmitted to a second phase modulator 9 of the push-pull modulator;
step four, the external cavity laser 2 generates continuous laser signals and transmits the continuous laser signals to the push-pull modulator through single-mode optical fibers, and the continuous laser signals are divided into an upper path continuous optical signal and a lower path continuous optical signal;
step five, the continuous optical signal of the upper route is transmitted to the first phase modulator 8 and is modulated by the real part analog signal of the signal Data; the downlink continuous optical signal is transmitted to a second phase modulator 9 and is modulated by an imaginary part analog signal of the signal Data;
step six, superposing the modulated two paths of optical signals at the output end of the push-pull modulator, wherein the superposed signals are expressed as:
wherein R is the photoelectric response coefficient of the push-pull modulator, and real (data) is a numberReal part of complex form modulation vector signal generated after word signal processing, Imaga (data) is imaginary part of complex form modulation vector signal generated after digital signal processing, i is imaginary number, A is direct current voltage, B is vector signal modulated by base band, w is zero1Is the angular frequency, w, of subcarrier 12Is the angular frequency of subcarrier 2, t is time, e is the base of the natural logarithm, DC is the optical output of the push-pull modulator when no modulation signal is present;
step seven, transmitting the optical signal after passing through the push-pull modulator to an optical amplifier 10 for signal amplification;
step eight, transmitting the optical signal amplified by the optical amplifier 10 to an optical filter 11 for optical signal filtering;
step nine, transmitting the optical signal filtered by the optical filter 11 to a photoelectric detector 12 for photoelectric conversion, wherein a beat frequency signal generated by a beat frequency effect during photoelectric conversion is an electric vector millimeter wave signal;
in specific implementation, a beat frequency effect occurs when the upper and lower sideband signals are subjected to photoelectric conversion, the frequency of the signal subjected to beat frequency depends on the frequency difference of the upper and lower sideband signals, the signal after passing through the photodetector 12 is converted into an electrical signal, the amplitude and the phase of the optical millimeter wave signal can be modulated by the digital signal processor 1, the obtained millimeter wave signal contains amplitude modulation and phase modulation information, namely, an optical vector millimeter wave signal, and the optical vector millimeter wave signal is converted into an electrical vector millimeter wave signal after passing through the photodetector 12.
Step ten, transmitting the electric vector millimeter wave signal obtained by conversion by the photoelectric detector 12 to a millimeter wave amplifier 13, and amplifying the electric vector millimeter wave signal;
step eleven, the electric vector millimeter wave signals amplified by the millimeter wave amplifier 13 are transmitted to the antenna 14 through a high-frequency coaxial cable, and the electric vector millimeter wave signals are transmitted to a free space through the antenna 14 to obtain wireless electric vector millimeter wave signals.
In order to verify the technical effect which can be generated by the invention, an ROF system transmission experiment is carried out on the electric vector millimeter wave signal generated by the electric vector millimeter wave generating system of the push-pull modulator, a QPSK protocol is utilized at a transmitting end to generate an optical vector millimeter wave signal of 4Gbaud and 80GHz, wherein the generated optical vector millimeter wave signal is transmitted for 80km in a single-mode optical fiber, and the optical vector millimeter wave signal is converted into an electric vector millimeter wave signal after photoelectric conversion and is transmitted for 50cm in a free space through a Cassegrain antenna; at a receiving end, the same Cassegrain antenna is used for receiving wireless signals, the frequency of a local oscillator is 72GHz, vector millimeter wave signals are down-converted to 8GHz after frequency mixing, finally, sampling is carried out by using a high-speed analog-to-digital converter (ADC), and the signals are demodulated by using a digital signal processing mode, so that the application of ROF communication is realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (1)
1. An electric vector millimeter wave generating method based on a push-pull modulator is characterized in that an electric vector millimeter wave generating system comprises a digital signal processor (1), an external cavity laser (2), the push-pull modulator connected with the output end of the external cavity laser (2), and a direct current bias voltage source (3) connected with the push-pull modulator; the output end of the digital signal processor (1) is connected with a first analog-to-digital converter (4) and a second analog-to-digital converter (5), the output end of the first analog-to-digital converter (4) is connected with a first radio frequency driver (6), the output end of the second analog-to-digital converter (5) is connected with a second radio frequency driver (7), the push-pull modulator comprises a first phase modulator (8) and a second phase modulator (9) which work in a push-pull mode, the first phase modulator (8) is connected with the output end of the first radio frequency driver (6), the second phase modulator (9) is connected with the output end of the second radio frequency driver (7), the output end of the push-pull modulator is connected with an optical amplifier (10), the output end of the optical amplifier (10) is connected with an optical filter (11), the output end of the optical filter (11) is connected with a photoelectric detector (12), the output end of the photoelectric detector (12) is connected with a millimeter wave amplifier (13), and the output end of the millimeter wave amplifier (13) is connected with an antenna (14) for transmitting electric vector millimeter wave signals to a free space; the optical amplifier (10) is an erbium-doped optical fiber amplifier, the antenna (14) is a Cassegrain antenna, the first phase modulator (8) and the direct current bias voltage source (3) are connected through cables, the second phase modulator (9) and the direct current bias voltage source (3) are connected through single-mode optical fibers, the outer cavity laser (2) and the push-pull modulator, the push-pull modulator and the optical amplifier (10), the optical amplifier (10) and the optical filter (11), the optical filter (11) and the photoelectric detector (12) are connected through cables, the photoelectric detector (12) and the millimeter wave amplifier (13) are connected through single-mode optical fibers, and the digital signal processor (1) and the first analog-to-digital converter (4) and the second analog-to-digital converter (5), and the first analog-to-digital converter (4) and the first radio frequency driver (6), The second analog-to-digital converter (5) and the second radio frequency driver (7), the first radio frequency driver (6) and the first phase modulator (8), and the second radio frequency driver (7) and the second phase modulator (9) are connected by high-frequency coaxial cables; the method is characterized by comprising the following steps:
step one, the digital signal processor (1) generates a complex signal Data and separates the complex signal Data into a real part digital signal and an imaginary part digital signal;
step two, the first analog-to-digital converter (4) converts the real part digital signal of the complex signal Data into an analog signal; the second analog-to-digital converter (5) converts an imaginary part digital signal of the complex signal Data into an analog signal;
thirdly, amplifying the real part analog signal of the signal Data through a first radio frequency driver (6) and transmitting the amplified signal to a first phase modulator (8) of the push-pull modulator; the imaginary part analog signal of the signal Data is amplified by a second radio frequency driver (7) and then transmitted to a second phase modulator (9) of the push-pull modulator;
step four, the external cavity laser (2) generates continuous laser signals and transmits the continuous laser signals to the push-pull modulator through single-mode optical fibers, and the continuous laser signals are divided into an upper path continuous optical signal and a lower path continuous optical signal;
step five, the continuous optical signal of the upper route is transmitted to a first phase modulator (8) and is modulated by the real part analog signal of the signal Data; the downlink continuous optical signal is transmitted to a second phase modulator (9) and is modulated by an imaginary part analog signal of the Data signal;
step six, superposing the modulated two paths of optical signals at the output end of the push-pull modulator, wherein the superposed signals are expressed as:
wherein, R is the photoelectric response coefficient of the push-pull modulator, real (data) is the real part of the complex form modulation vector signal generated after the digital signal processing, Imaga (data) is the imaginary part of the complex form modulation vector signal generated after the digital signal processing, i is an imaginary number, A is direct current voltage, B is the vector signal modulated by the base band, w is the carrier band modulation vector signal, and1is the angular frequency, w, of subcarrier 12Is the angular frequency of subcarrier 2, t is time, e is the base of the natural logarithm, DC is the optical output of the push-pull modulator when no modulation signal is present;
step seven, transmitting the optical signal after passing through the push-pull modulator to an optical amplifier (10) for signal amplification;
step eight, transmitting the optical signal amplified by the optical amplifier (10) to an optical filter (11) for optical signal filtering;
step nine, transmitting the optical signal filtered by the optical filter (11) to a photoelectric detector (12) for photoelectric conversion, wherein a beat frequency signal generated by a beat frequency effect during photoelectric conversion is an electric vector millimeter wave signal;
step ten, the electric vector millimeter wave signals obtained through conversion by the photoelectric detector (12) are transmitted to a millimeter wave amplifier (13) for electric vector millimeter wave signal amplification;
step eleven, the electric vector millimeter wave signals amplified by the millimeter wave amplifier (13) are transmitted to the antenna (14) through a high-frequency coaxial cable, and the electric vector millimeter wave signals are transmitted to a free space through the antenna (14) to obtain wireless electric vector millimeter wave signals.
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| CN111224720B (en) * | 2020-02-25 | 2021-09-03 | 西安邮电大学 | Terahertz vector signal generation system and method of cascade connection of dual-intensity modulator |
| CN112350777A (en) * | 2020-10-29 | 2021-02-09 | 复旦大学 | Double-vector millimeter wave generation system and method based on push-pull modulator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1200492A (en) * | 1997-05-28 | 1998-12-02 | 日本电气株式会社 | Semiconductor mach-zehnder modulator |
| CN101742738A (en) * | 2009-10-13 | 2010-06-16 | 北京邮电大学 | Quadruple frequency-based scheme for realizing base station passive full duplex millimeter wave RoF link |
| CN102255662A (en) * | 2011-07-06 | 2011-11-23 | 东华大学 | Radio over fibre system |
| CN106375019A (en) * | 2016-10-29 | 2017-02-01 | 复旦大学 | Electrical absorption modulation laser device-based high frequency vector radiofrequency signal generation system and precoding method |
| CN106533566A (en) * | 2016-11-21 | 2017-03-22 | 华中科技大学 | Method for improving linearity of directly modulated microwave photonic link based on push-pull structure and compensation algorithm |
| CN107911174A (en) * | 2017-11-02 | 2018-04-13 | 西北工业大学 | A kind of light of Larger Dynamic scope carries radio frequency link system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447513A (en) * | 2011-09-05 | 2012-05-09 | 北京邮电大学 | 60GHz millimeter wave-based optical wireless fusion video transmission system and method |
-
2019
- 2019-08-08 CN CN201910727864.6A patent/CN110505016B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1200492A (en) * | 1997-05-28 | 1998-12-02 | 日本电气株式会社 | Semiconductor mach-zehnder modulator |
| CN101742738A (en) * | 2009-10-13 | 2010-06-16 | 北京邮电大学 | Quadruple frequency-based scheme for realizing base station passive full duplex millimeter wave RoF link |
| CN102255662A (en) * | 2011-07-06 | 2011-11-23 | 东华大学 | Radio over fibre system |
| CN106375019A (en) * | 2016-10-29 | 2017-02-01 | 复旦大学 | Electrical absorption modulation laser device-based high frequency vector radiofrequency signal generation system and precoding method |
| CN106533566A (en) * | 2016-11-21 | 2017-03-22 | 华中科技大学 | Method for improving linearity of directly modulated microwave photonic link based on push-pull structure and compensation algorithm |
| CN107911174A (en) * | 2017-11-02 | 2018-04-13 | 西北工业大学 | A kind of light of Larger Dynamic scope carries radio frequency link system |
Non-Patent Citations (2)
| Title |
|---|
| 80-GHz RoF Based on Push–Pull Modulator;F.Zhao,etal.;《IEEE Photonics Journal》;20190813;第1-7页 * |
| Single-sideband W-band photonic vector millimeter-wave signal generation by one single I/Q modulator;xinying li,etal.;《Optics Letters》;20160915;第4162-4165页 * |
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