CN103701529A - Signal time delay stable transmission method and system of broadband - Google Patents
Signal time delay stable transmission method and system of broadband Download PDFInfo
- Publication number
- CN103701529A CN103701529A CN201310662454.0A CN201310662454A CN103701529A CN 103701529 A CN103701529 A CN 103701529A CN 201310662454 A CN201310662454 A CN 201310662454A CN 103701529 A CN103701529 A CN 103701529A
- Authority
- CN
- China
- Prior art keywords
- signal
- radio frequency
- optical
- remote
- central station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 175
- 239000013307 optical fiber Substances 0.000 claims abstract description 80
- 239000006185 dispersion Substances 0.000 claims abstract description 29
- 230000003321 amplification Effects 0.000 claims description 23
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000001934 delay Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000001427 coherent effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Optical Communication System (AREA)
Abstract
本发明提供一种宽带的信号时延稳定传输方法和系统，包括：在中心站产生稳定的频率标准信号；利用可调谐激光器产生光载波；将频率标准信号调制到光载波上，形成初始光信号；通过光纤传输至远端；将远端光信号回传入同一根光纤至中心站；将回传光信号解调；比较回传射频信号与频率标准信号的相位差；根据相位差控制可调谐激光器改变光载波波长，得到补偿光载波，使色散时延差，与链路时延抖动相加为零；自远端输入宽带射频信号；将远端输入的宽带射频信号调制到远端光信号上，成为远端调制光信号，并回传；将中心站接收到的远端调制光信号解调为稳定远端射频信号并输出。本发明无需添加额外的补偿器件，系统结构简单，实用性强。
The present invention provides a broadband signal delay stable transmission method and system, including: generating a stable frequency standard signal at a central station; using a tunable laser to generate an optical carrier; modulating the frequency standard signal onto the optical carrier to form an initial optical signal ;Transmit to the far end through optical fiber; return the remote optical signal to the same optical fiber to the central station; demodulate the returned optical signal; compare the phase difference between the returned radio frequency signal and the frequency standard signal; control the tunable according to the phase difference The laser changes the wavelength of the optical carrier to obtain a compensated optical carrier, so that the dispersion delay difference and the link delay jitter add to zero; input broadband radio frequency signal from the remote end; modulate the broadband radio frequency signal input from the remote end to the remote optical signal Then, it becomes a remote modulated optical signal and transmits it back; the remote modulated optical signal received by the central station is demodulated into a stable remote radio frequency signal and output. The invention does not need to add additional compensating devices, the system structure is simple, and the practicability is strong.
Description
技术领域technical field
本发明涉及信号传输领域，尤其涉及一种宽带的信号时延稳定传输方法和系统。The invention relates to the field of signal transmission, in particular to a broadband signal delay stable transmission method and system.
背景技术Background technique
为了提高空间电磁频谱探测、航天飞行控制、雷达等系统的精度，测控、探测系统正在从单天线向多天线、单基地向多基地发展。为了进一步提高探测精度，下一代多天线系统必然向着相干测量发展。要实现多天线之间的相干测量、信号相干合成，必须保证在各天线之间实现高精度的时间同步和高稳定度的频率分布。在多天线系统中，各天线单元之间的距离一般为几公里甚至几十公里，要实现如此长距离的时频信号高精度分布必须采用先进的光纤传输技术。基于光纤的稳相传输技术是下一代航天测控系统，特别是甚长基线干涉测量（VLBI）和连线干涉测量（CEI）等航天测控和导航、深空探测、多基地相干雷达、电子战等系统中，不可缺少的基石。In order to improve the accuracy of space electromagnetic spectrum detection, spaceflight control, radar and other systems, measurement and control and detection systems are developing from single antenna to multi-antenna, single base to multi-base. In order to further improve the detection accuracy, the next-generation multi-antenna system must develop towards coherent measurement. To achieve coherent measurement and signal coherent combination between multiple antennas, it is necessary to ensure high-precision time synchronization and high-stability frequency distribution among the antennas. In a multi-antenna system, the distance between antenna units is generally several kilometers or even tens of kilometers. To achieve such a long-distance high-precision distribution of time-frequency signals, advanced optical fiber transmission technology must be used. Optical fiber-based phase-stable transmission technology is the next generation of aerospace measurement and control systems, especially aerospace measurement and control and navigation, deep space exploration, multi-base coherent radar, electronic warfare, etc. System, an indispensable cornerstone.
图1是现有技术中典型的微波频率稳相传输光纤链路结构，该方案是最直接的传递微波频率参考的方式。将射频参考信号直接通过强度调制器调制在光载波上传输，经光纤传输到远端天线处，光信号在远端部分反射，经光纤再次传输回到中心站，与原始的射频参考信号进行比较，得到光纤链路引入的相位噪声信号，用该信号控制压电陶瓷（PZT）或温控光线卷，主动补偿相位抖动后，实现频率参考的稳定相位传输。使用该方案远端可以直接用探测器得到所需射频参考信号。Fig. 1 is a typical optical fiber link structure for microwave frequency phase-stable transmission in the prior art, and this solution is the most direct way of transmitting microwave frequency reference. The radio frequency reference signal is directly modulated on the optical carrier through the intensity modulator and transmitted to the remote antenna through the optical fiber. The optical signal is partially reflected at the remote end, and then transmitted back to the central station through the optical fiber, and compared with the original radio frequency reference signal , get the phase noise signal introduced by the optical fiber link, use the signal to control the piezoelectric ceramic (PZT) or temperature-controlled optical coil, after actively compensating the phase jitter, realize the stable phase transmission of the frequency reference. Using this solution, the remote end can directly use the detector to obtain the required radio frequency reference signal.
但是，现有技术必须通过添加额外的补偿器件来实现光纤链路的时延补偿，以达到频率信号的稳定传输，有时甚至需要多种补偿器件共同协调工作，结构复杂，不利于实际应用中的稳频调节和信号传输。However, in the prior art, the time delay compensation of the optical fiber link must be realized by adding additional compensating devices to achieve stable transmission of frequency signals. Frequency stabilization regulation and signal transmission.
发明内容Contents of the invention
（一）要解决的技术问题(1) Technical problems to be solved
本发明提供一种宽带的信号时延稳定传输方法和系统，以解决现有技术中需要添加额外补偿器件来实现光纤链路时延抖动补偿，系统结构复杂的技术问题。The invention provides a broadband signal time delay stable transmission method and system to solve the technical problems in the prior art that an additional compensation device needs to be added to realize fiber link time delay jitter compensation and the system structure is complex.
（二）技术方案(2) Technical solution
为解决上述技术问题，本发明提供一种宽带的信号时延稳定传输方法，包括：In order to solve the above technical problems, the present invention provides a broadband signal delay stable transmission method, including:
在中心站产生稳定的频率标准信号；Generate a stable frequency standard signal at the central station;
利用可调谐激光器产生光载波；Generating an optical carrier using a tunable laser;
将所述频率标准信号调制到所述光载波上，形成初始光信号；modulating the frequency standard signal onto the optical carrier to form an initial optical signal;
将所述初始光信号通过光纤传输至远端；transmitting the initial optical signal to the far end through an optical fiber;
将远端光信号回传入同一根光纤至中心站；Return the remote optical signal to the same optical fiber to the central station;
将回传光信号解调得到回传射频信号；Demodulating the return optical signal to obtain a return radio frequency signal;
比较所述回传射频信号与所述频率标准信号的相位差；comparing the phase difference between the returned radio frequency signal and the frequency standard signal;
根据所述相位差控制可调谐激光器改变光载波波长，得到补偿光载波，使补偿光载波经光纤传输后与初始光载波的色散时延差，与所述相位差导致的链路时延抖动相加为零；According to the phase difference, the tunable laser is controlled to change the wavelength of the optical carrier to obtain a compensated optical carrier, so that the dispersion delay difference between the compensated optical carrier and the original optical carrier after the optical fiber is transmitted is equal to the link delay jitter caused by the phase difference add to zero;
自远端输入宽带射频信号；Input broadband radio frequency signal from remote;
将远端输入的宽带射频信号调制到所述远端光信号上，成为远端调制光信号，并回传；Modulating the broadband radio frequency signal input from the remote end onto the remote optical signal to become a remote modulated optical signal, and transmitting it back;
将中心站接收到的远端调制光信号解调为稳定远端射频信号并输出。Demodulate the remote modulated optical signal received by the central station into a stable remote radio frequency signal and output it.
进一步地，所述使补偿光载波经光纤传输后与初始光载波的色散时延差，与所述相位差导致的链路时延抖动相加为零包括：Further, adding the dispersion delay difference between the compensated optical carrier and the initial optical carrier after the optical carrier is transmitted through the optical fiber, and the link delay jitter caused by the phase difference to zero includes:
令所述频率标准信号的中心频率为ω，初始相位为
控制可调谐激光器改变激光波长为λ+Δλ，使其满足
进一步地，further,
在所述将远端光信号回传入同一根光纤至中心站之后，所述将回传光信号解调得到回传射频信号之前，还包括：对回传光信号进行信号放大；After said returning the remote optical signal to the same optical fiber to the central station, before said demodulating the returned optical signal to obtain the returned radio frequency signal, it also includes: performing signal amplification on the returned optical signal;
和/或，在所述回传之后，且在所述将中心站接收到的远端调制光信号解调为稳定远端射频信号并输出之前，还包括：对接收到的远端调制光信号进行信号放大。And/or, after the backtransmission, and before the demodulation of the remote modulated optical signal received by the central station into a stable remote radio frequency signal and output, further includes: the received remote modulated optical signal Perform signal amplification.
进一步地，further,
在所述将回传光信号解调得到回传射频信号之后，所述比较所述回传射频信号与所述频率标准信号的相位差之前，还包括：对所述回传射频信号进行射频放大和滤波；After the demodulation of the return optical signal to obtain the return radio frequency signal, before comparing the phase difference between the return radio frequency signal and the frequency standard signal, it also includes: performing radio frequency amplification on the return radio frequency signal and filtering;
和/或，在所述将中心站接收到的远端调制光信号解调为稳定远端射频信号之后，输出之前，还包括：对所述稳定远端射频信号进行射频放大和滤波。And/or, after demodulating the remote modulated optical signal received by the central station into a stable remote radio frequency signal and before outputting, the method further includes: performing radio frequency amplification and filtering on the stable remote radio frequency signal.
另一方面，本发明还提供一种宽带的信号时延稳定传输系统，包括：射频频率标准源、可调谐激光器、中心站电光调制器、光纤、回传设备、中心站光电探测器、鉴相器、补偿控制单元、远端射频信号源和远端电光调制器，其中：On the other hand, the present invention also provides a broadband signal delay stable transmission system, including: radio frequency frequency standard source, tunable laser, central station electro-optic modulator, optical fiber, return equipment, central station photodetector, phase detection device, compensation control unit, remote radio frequency signal source and remote electro-optical modulator, where:
射频频率标准源，分别与中心站电光调制器和鉴相器连接，用于在中心站产生稳定的频率标准信号；The radio frequency standard source is connected with the electro-optic modulator and the phase detector of the central station respectively, and is used to generate a stable frequency standard signal at the central station;
可调谐激光器，分别与中心站电光调制器和补偿控制单元连接，用于产生光载波；The tunable laser is respectively connected with the electro-optic modulator and the compensation control unit of the central station, and is used to generate an optical carrier;
中心站电光调制器，还与光纤相连，用于将所述频率标准信号调制到所述光载波上，形成初始光信号；The electro-optical modulator at the central station is also connected to the optical fiber, and is used to modulate the frequency standard signal onto the optical carrier to form an initial optical signal;
光纤，还分别与回传设备、远端电光调制器和中心站光电探测器相连，用于将所述初始光信号传输至远端；The optical fiber is also respectively connected with the backhaul equipment, the remote electro-optic modulator and the central station photodetector, and is used to transmit the initial optical signal to the remote end;
回传设备，用于将远端光信号回传入同一根光纤至中心站；将远端调制光信号回传；Return equipment, used to return the remote optical signal to the same optical fiber to the central station; return the remote modulated optical signal;
中心站光电探测器，还与鉴相器相连，用于将回传光信号解调得到回传射频信号；将中心站接收到的远端调制光信号解调为稳定远端射频信号并输出；The central station photodetector is also connected to the phase detector, which is used to demodulate the return optical signal to obtain the return radio frequency signal; demodulate the remote modulated optical signal received by the central station into a stable remote radio frequency signal and output it;
鉴相器，用于比较所述回传射频信号与所述频率标准信号的相位差；a phase detector, used to compare the phase difference between the returned radio frequency signal and the frequency standard signal;
补偿控制单元，与鉴相器和可调谐激光器相连，用于根据所述相位差控制可调谐激光器改变光载波波长，得到补偿光载波，使补偿光载波经光纤传输后与初始光载波的色散时延差，与所述相位差导致的链路时延抖动相加为零；The compensation control unit is connected with the phase detector and the tunable laser, and is used to control the tunable laser to change the wavelength of the optical carrier according to the phase difference, so as to obtain the compensated optical carrier, so that the dispersion time between the compensated optical carrier and the initial optical carrier after being transmitted through the optical fiber is The delay difference is added to the link delay jitter caused by the phase difference to be zero;
远端射频信号源，用于自远端输入宽带射频信号；The remote radio frequency signal source is used to input the broadband radio frequency signal from the far end;
远端电光调制器，将远端输入的宽带射频信号调制到远端光信号上，成为远端调制光信号。The remote electro-optic modulator modulates the broadband radio frequency signal input from the remote end to the remote optical signal to become a remote modulated optical signal.
进一步地，所述补偿控制单元包括：Further, the compensation control unit includes:
相位差计算子单元，用于计算所述回传射频信号与所述频率标准信号的相位差：The phase difference calculation subunit is used to calculate the phase difference between the returned radio frequency signal and the frequency standard signal:
令所述频率标准信号的中心频率为ω，初始相位为
波长改变子单元，用于控制可调谐激光器改变光载波波长为λ+Δλ，使其满足其中，D是单模光纤的色散系数，L为光纤的长度。The wavelength changing subunit is used to control the tunable laser to change the wavelength of the optical carrier to λ+Δλ, so that it satisfies Among them, D is the dispersion coefficient of the single-mode fiber, and L is the length of the fiber.
进一步地，further,
所述回传设备为：法拉第旋转镜，和/或，远端光环形器。The return device is: a Faraday rotating mirror, and/or a remote optical circulator.
进一步地，所述系统还包括：Further, the system also includes:
中心站光环形器，分别与中心站电光调制器、光纤和中心站光电探测器顺时针相连，用于控制中心站光信号的顺序传输。The central station optical circulator is respectively connected clockwise with the central station electro-optic modulator, the optical fiber and the central station photodetector, and is used to control the sequential transmission of the central station optical signal.
进一步地，所述系统还包括：Further, the system also includes:
中心站掺铒光纤放大器，连接在光纤和中心站光电探测器之间，用于对回传光信号和远端调制光信号进行信号放大。The central station erbium-doped optical fiber amplifier is connected between the optical fiber and the central station photodetector, and is used for signal amplification of the return optical signal and the remote modulation optical signal.
进一步地，所述系统还包括：Further, the system also includes:
回传射频放大器，与中心站光电探测器相连，用于对所述回传射频信号进行射频放大；回传滤波器，连接在回传射频放大器和鉴相器之间，用于对射频放大后的回传射频信号进行滤波；The return radio frequency amplifier is connected with the photodetector of the central station, and is used for radio frequency amplification of the return radio frequency signal; the return filter is connected between the return radio frequency amplifier and the phase detector, and is used for amplifying the radio frequency The return radio frequency signal is filtered;
和/或，输出射频放大器，与中心站光电探测器相连，用于对所述稳定远端射频信号进行射频放大；输出滤波器，连接在输出射频放大器和输出端之间，用于对射频放大后的稳定远端射频信号进行滤波。And/or, the output radio frequency amplifier is connected with the central station photodetector for radio frequency amplification of the stable remote radio frequency signal; the output filter is connected between the output radio frequency amplifier and the output terminal for radio frequency amplification The final stable remote radio frequency signal is filtered.
（三）有益效果(3) Beneficial effects
可见，在本发明提出的宽带的信号时延稳定传输方法和系统中，通过比较往返传递的回传射频信号和射频频率标准信号的相位差，得出光纤链路的时延抖动，然后利用可调谐激光器改变激光波长，通过不同波长在光纤中传递时产生不同的色散时延来补偿这种抖动，最后实现将远端宽带射频信号频率和相位稳定的回传到中心站输出。本发明利用光纤同时作为传输介质和补偿器件，无需添加额外的补偿器件来实现相位/频率抖动补偿过程，系统结构简单，实用性强。It can be seen that in the broadband signal time-delay stable transmission method and system proposed by the present invention, by comparing the phase difference between the return radio frequency signal and the radio frequency standard signal transmitted back and forth, the time delay jitter of the optical fiber link is obtained, and then using the available Tuning the laser changes the laser wavelength, and compensates for this jitter by producing different dispersion delays when different wavelengths are transmitted in the optical fiber, and finally realizes the stable frequency and phase of the remote broadband radio frequency signal back to the central station for output. The invention uses the optical fiber as the transmission medium and the compensation device at the same time, without adding additional compensation devices to realize the phase/frequency jitter compensation process, the system structure is simple, and the practicability is strong.
另外，本发明通过改变激光波长来得到不同的色散时延以补偿光纤链路抖动，补偿范围更大，并且由于色散时延与光纤的长度成正比，光纤越长，补偿的范围也越大；同时，本发明能够保证光纤链路的总时延保持恒定，能够在链路调制上不同频率的射频频率标准信号并进行传递，传递链路的带宽大，并且适用于时间信号的传输。In addition, the present invention obtains different dispersion delays by changing the laser wavelength to compensate for fiber link jitter, and the compensation range is larger, and since the dispersion delay is proportional to the length of the optical fiber, the longer the optical fiber, the greater the compensation range; At the same time, the invention can ensure that the total time delay of the optical fiber link remains constant, can modulate and transmit radio frequency standard signals of different frequencies on the link, has a large bandwidth of the transmission link, and is suitable for the transmission of time signals.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1是微波频率稳相传输光纤链路结构示意图；Figure 1 is a schematic diagram of the structure of an optical fiber link for microwave frequency phase-stable transmission;
图2是本发明实施例宽带的信号时延稳定传输方法的基本流程示意图；Fig. 2 is a schematic flow chart of a broadband signal delay stable transmission method according to an embodiment of the present invention;
图3是本发明实施例宽带的信号时延稳定传输系统的基本结构示意图；3 is a schematic diagram of a basic structure of a broadband signal delay stable transmission system according to an embodiment of the present invention;
图4是本发明实施例宽带的信号时延稳定传输系统的一个优选实施例结构示意图；FIG. 4 is a schematic structural diagram of a preferred embodiment of a broadband signal delay stable transmission system according to an embodiment of the present invention;
图5是本发明实施例宽带的信号时延稳定传输方法的一个优选实施例流程示意图；FIG. 5 is a schematic flowchart of a preferred embodiment of a broadband signal delay stable transmission method according to an embodiment of the present invention;
图6是本发明实施例宽带的信号时延稳定传输系统的一个优选实施例结构示意图。Fig. 6 is a schematic structural diagram of a preferred embodiment of a broadband signal delay stable transmission system according to an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
本发明实施例首先提出一种宽带的信号时延稳定传输方法，参见图2，包括：The embodiment of the present invention first proposes a broadband signal delay stable transmission method, see Figure 2, including:
步骤201：在中心站产生稳定的频率标准信号。Step 201: Generate a stable frequency standard signal at the central station.
步骤202：利用可调谐激光器产生光载波。Step 202: Generate an optical carrier using a tunable laser.
步骤203：将所述频率标准信号调制到所述光载波上，形成初始光信号。Step 203: Modulate the frequency standard signal onto the optical carrier to form an initial optical signal.
步骤204：将所述初始光信号通过光纤传输至远端。Step 204: Transmit the initial optical signal to the remote end through an optical fiber.
步骤205：将远端光信号回传入同一根光纤至中心站。Step 205: Return the remote optical signal to the central station through the same optical fiber.
步骤206：将回传光信号解调得到回传射频信号。Step 206: Demodulate the return optical signal to obtain a return radio frequency signal.
步骤207：比较所述回传射频信号与所述频率标准信号的相位差。Step 207: Compare the phase difference between the returned radio frequency signal and the frequency standard signal.
步骤208：根据所述相位差控制可调谐激光器改变光载波波长，得到补偿光载波，使补偿光载波经光纤传输后与初始光载波的色散时延差，与所述相位差导致的链路时延抖动相加为零。Step 208: Control the tunable laser to change the wavelength of the optical carrier according to the phase difference to obtain a compensated optical carrier, so that the dispersion delay difference between the compensated optical carrier and the initial optical carrier after being transmitted through the optical fiber is different from the link time caused by the phase difference Delay jitter sums to zero.
步骤209：自远端输入宽带射频信号。Step 209: Input the broadband radio frequency signal from the remote end.
步骤210：将远端输入的宽带射频信号调制到远端光信号上，成为远端调制光信号，并回传。Step 210: Modulate the broadband radio frequency signal input from the far end onto the far end optical signal to become a remote modulated optical signal, and transmit it back.
步骤211：将中心站接收到的远端调制光信号解调为稳定远端射频信号并输出。Step 211: Demodulate the remote modulated optical signal received by the central station into a stable remote radio frequency signal and output it.
可见，在本发明实施例提出的宽带的信号时延稳定传输方法中，通过比较往返传递的回传射频信号和射频频率标准信号的相位差，得出光纤链路的时延抖动，然后利用可调谐激光器改变激光波长，通过不同波长在光纤中传递时产生不同的色散时延来补偿这种抖动，最后实现将远端宽带射频信号频率和相位稳定的回传到中心站输出。本发明利用光纤同时作为传输介质和补偿器件，无需添加额外的补偿器件来实现相位/频率抖动补偿过程，系统结构简单，实用性强。It can be seen that in the broadband signal delay stable transmission method proposed in the embodiment of the present invention, the delay jitter of the optical fiber link is obtained by comparing the phase difference between the return radio frequency signal transmitted back and forth and the radio frequency standard signal, and then using the available Tuning the laser changes the laser wavelength, and compensates for this jitter by producing different dispersion delays when different wavelengths are transmitted in the optical fiber, and finally realizes the stable frequency and phase of the remote broadband radio frequency signal back to the central station for output. The invention uses the optical fiber as the transmission medium and the compensation device at the same time, without adding additional compensation devices to realize the phase/frequency jitter compensation process, the system structure is simple, and the practicability is strong.
另外，本发明通过改变激光波长来得到不同的色散时延以补偿光纤链路抖动，补偿范围更大，并且由于色散时延与光纤的长度成正比，光纤越长，补偿的范围也越大；同时，本发明能够保证光纤链路的总时延保持恒定，能够在链路调制上不同频率的射频频率标准信号并进行传递，传递链路的带宽大，并且适用于时间信号的传输。In addition, the present invention obtains different dispersion delays by changing the laser wavelength to compensate for fiber link jitter, and the compensation range is larger, and since the dispersion delay is proportional to the length of the optical fiber, the longer the optical fiber, the greater the compensation range; At the same time, the invention can ensure that the total time delay of the optical fiber link remains constant, can modulate and transmit radio frequency standard signals of different frequencies on the link, has a large bandwidth of the transmission link, and is suitable for the transmission of time signals.
在本发明一个实施例中，令射频频率标准源产生一个稳定的单频点频率标准信号，其中心频率为ω，初始相位为
设光纤链路由于温度变化和振动引入的时延抖动为Δτpath；返回到中心站的光信号经光电探测器解调，恢复为射频信号，它的相位为
往返传递后恢复的射频信号与源信号通过鉴相器比较相位差，得出误差相位：根据这个误差信号2ωΔτpath，控制可调谐激光器，改变激光器的波长到λ+Δλ，这时候调制到光载波上的射频信号与调制到光载波λ上的射频信号相比，经过光纤传输后，会有一个色散导致的时延差：Δτdisp=D·L·Δλ，其中，D是单模光纤的色散系数，L为光纤的长度。The phase difference between the recovered RF signal and the source signal after the round-trip transmission is compared with the phase detector to obtain the error phase: According to this error signal 2ωΔτ path , the tunable laser is controlled and the wavelength of the laser is changed to λ+Δλ. At this time, the radio frequency signal modulated on the optical carrier is compared with the radio frequency signal modulated on the optical carrier λ. There is a delay difference caused by dispersion: Δτ disp =D·L·Δλ, where D is the dispersion coefficient of the single-mode fiber, and L is the length of the fiber.
光信号传递到远端后，经光电探测器恢复成射频信号，它经历了Δτpath和Δτdisp两种时延变化，相位可以表示为：After the optical signal is transmitted to the far end, it is restored to a radio frequency signal by the photodetector. It has experienced two kinds of time delay changes, Δτ path and Δτ disp , and the phase can be expressed as:
在中心站通过误差信号2ωΔτpath改变激光器波长，使其满足
在本发明的另一个实施例中，为了对光纤链路中的信号进行放大，优选地，在将远端光信号回传入同一根光纤至中心站之后，将回传光信号解调得到回传射频信号之前，还可以包括：对回传光信号进行信号放大。在回传之后，且在将中心站接收到的远端调制光信号解调为稳定远端射频信号并输出之前，还可以包括：对接收到的远端调制光信号进行信号放大。In another embodiment of the present invention, in order to amplify the signal in the optical fiber link, preferably, after the remote optical signal is transmitted back to the same optical fiber to the central station, the returned optical signal is demodulated to obtain the returned Before transmitting the radio frequency signal, it may further include: performing signal amplification on the return optical signal. After the backhaul, and before demodulating the remote modulated optical signal received by the central station into a stable remote radio frequency signal and outputting it, it may further include: performing signal amplification on the received remote modulated optical signal.
在本发明的一个实施例中，为了得到更高质量的射频信号，优选地，在将回传光信号解调得到回传射频信号之后，比较所述回传射频信号与所述频率标准信号的相位差之前，还可以包括：对所述回传射频信号进行射频放大和滤波。在将中心站接收到的远端调制光信号解调为稳定远端射频信号之后，输出之前，还可以包括：对所述稳定远端射频信号进行射频放大和滤波。In an embodiment of the present invention, in order to obtain a higher quality radio frequency signal, preferably, after demodulating the return optical signal to obtain the return radio frequency signal, compare the return radio frequency signal with the frequency standard signal Before the phase difference, it may further include: performing radio frequency amplification and filtering on the returned radio frequency signal. After demodulating the remote modulated optical signal received by the central station into a stable remote radio frequency signal and before outputting, the method may further include: performing radio frequency amplification and filtering on the stable remote radio frequency signal.
本发明实施例还提出一种宽带的信号时延稳定传输系统，如图3所示，包括：The embodiment of the present invention also proposes a broadband signal delay stable transmission system, as shown in Figure 3, including:
射频频率标准源1，分别与中心站电光调制器和鉴相器连接，用于在中心站产生稳定的频率标准信号；The radio frequency standard source 1 is connected with the electro-optic modulator and the phase detector of the central station respectively, and is used to generate a stable frequency standard signal at the central station;
可调谐激光器2，分别与中心站电光调制器和补偿控制单元连接，用于产生光载波；The
中心站电光调制器3，还与光纤相连，用于将所述频率标准信号调制到所述光载波上，形成初始光信号；The central station electro-
光纤4，还分别与回传设备、远端电光调制器和中心站光电探测器相连，用于将所述初始光信号传输至远端；The optical fiber 4 is also connected to the return equipment, the remote electro-optic modulator and the central station photodetector respectively, for transmitting the initial optical signal to the remote end;
回传设备5，用于将远端光信号回传入同一根光纤至中心站；将远端调制光信号回传；The backhaul device 5 is used to return the remote optical signal to the same optical fiber to the central station; return the remote modulated optical signal;
中心站光电探测器6，还与鉴相器相连，用于将回传光信号解调得到回传射频信号；将中心站接收到的远端调制光信号解调为稳定远端射频信号并输出；The
鉴相器7，用于比较所述回传射频信号与所述频率标准信号的相位差；A phase detector 7, used to compare the phase difference between the returned radio frequency signal and the frequency standard signal;
补偿控制单元8，与鉴相器和可调谐激光器相连，用于根据所述相位差控制可调谐激光器改变光载波波长，得到补偿光载波，使补偿光载波经光纤传输后与初始光载波的色散时延差，与所述相位差导致的链路时延抖动相加为零；The
远端射频信号源9，用于自远端输入宽带射频信号；The remote radio
远端电光调制器10，将远端输入的宽带射频信号调制到远端光信号上，成为远端调制光信号。The remote electro-
在本发明的一个实施例中，如图4所示，为了使补偿光信号经光纤传输后与初始光载波的色散时延差，与相位差相加为零，优选地，补偿控制单元8可以包括：In one embodiment of the present invention, as shown in FIG. 4 , in order to make the dispersion delay difference between the compensation optical signal and the initial optical carrier after being transmitted through the optical fiber, and the phase difference be added to zero, preferably, the
相位差计算子单元11，用于计算所述回传射频信号与所述频率标准信号的相位差：The phase difference calculation subunit 11 is used to calculate the phase difference between the returned radio frequency signal and the frequency standard signal:
令所述频率标准信号的中心频率为ω，初始相位为
波长改变子单元12，用于控制可调谐激光器改变激光波长为λ+Δλ，使其满足
在本发明的另一个实施例中，优选地，回传设备5可以是：法拉第旋转镜，和/或，远端光环形器。In another embodiment of the present invention, preferably, the return device 5 may be: a Faraday rotating mirror, and/or, a remote optical circulator.
在本发明的一个实施例中，优选地，还可以包括：中心站光环形器13，分别与中心站电光调制器、光纤和中心站光电探测器顺时针相连，用于控制中心站光信号的顺序传输。In one embodiment of the present invention, preferably, it may also include: a central station optical circulator 13, which is respectively connected clockwise with the central station electro-optic modulator, optical fiber and central station photodetector, for controlling the optical signal of the central station sequential transfer.
在本发明的另一个实施例中，为了对回传光信号和远端调制光信号进行放大，优选地，还可以包括：中心站掺铒光纤放大器14，连接在光纤和中心站光电探测器之间，用于对回传光信号和远端调制光信号进行信号放大。In another embodiment of the present invention, in order to amplify the return optical signal and the remote modulated optical signal, preferably, it may also include: a central station erbium-doped
在本发明的一个实施例中，为了得到更好的射频信号，优选地，还可以包括：回传射频放大器15，与中心站光电探测器相连，用于对所述回传射频信号进行射频放大；回传滤波器16，连接在回传射频放大器和鉴相器之间，用于对射频放大后的回传射频信号进行滤波。输出射频放大器17，与中心站光电探测器相连，用于对所述稳定远端射频信号进行射频放大；输出滤波器18，连接在输出射频放大器和输出端之间，用于对射频放大后的稳定远端射频信号进行滤波。In one embodiment of the present invention, in order to obtain a better radio frequency signal, preferably, it may also include: a return
下面以利用色散时延补偿，对1205MHz和2460MHz的射频频率信号进行回传为例，来具体说明本发明一个实施例的实现过程。如图5、图6所示：The implementation process of an embodiment of the present invention will be described in detail below by using dispersion delay compensation to transmit back radio frequency signals of 1205 MHz and 2460 MHz as an example. As shown in Figure 5 and Figure 6:
步骤501：在中心站产生稳定的频率标准信号。Step 501: Generate a stable frequency standard signal at the central station.
本步骤中，在中心站产生一个2420MHz的射频频率标准源，作为稳定的单频点频率标准信号。In this step, a 2420MHz radio frequency standard source is generated at the central station as a stable single frequency point frequency standard signal.
步骤502：利用可调谐激光器产生光载波。Step 502: Generate an optical carrier using a tunable laser.
步骤503：将频率标准信号调制到光载波上，形成初始光信号。Step 503: Modulate the frequency standard signal onto the optical carrier to form an initial optical signal.
本步骤中，利用电光调制器将频率标准信号调制到激光上，形成初始光载波。In this step, an electro-optical modulator is used to modulate the frequency standard signal onto the laser to form an initial optical carrier.
步骤504：将初始光信号通过光纤传输至远端。Step 504: Transmit the initial optical signal to the remote end through the optical fiber.
本发明实施例中，利用长度为10km的光纤，将初始光信号通过光环行器传输至远端。In the embodiment of the present invention, an optical fiber with a length of 10 km is used to transmit the initial optical signal to the remote end through an optical circulator.
步骤505：将远端光信号回传入同一根光纤至中心站。Step 505: Return the remote optical signal to the central station through the same optical fiber.
本步骤中，利用法拉第旋转镜，将远端光信号经远端光环形器回传至中心站。In this step, the Faraday rotating mirror is used to transmit the remote optical signal back to the central station through the remote optical circulator.
步骤506：将回传光信号信号进行放大。Step 506: Amplify the return optical signal.
本步骤中，利用中心站掺铒光纤放大器对回传的光信号进行放大。In this step, an erbium-doped optical fiber amplifier at the central station is used to amplify the returned optical signal.
步骤507：将放大后的回传光信号解调得到回传射频信号。Step 507: Demodulate the amplified return optical signal to obtain a return radio frequency signal.
本步骤中，利用中心站光电探测器对回传光信号进行解调，得到回传射频信号。In this step, the photodetector at the central station is used to demodulate the returned optical signal to obtain the returned radio frequency signal.
步骤508：对回传射频信号进行滤波。Step 508: Filter the returned radio frequency signal.
步骤509：比较回传射频信号与频率标准信号的相位差。Step 509: Compare the phase difference between the returned radio frequency signal and the frequency standard signal.
本步骤中，令频率标准信号的中心频率为ω，初始相位为
步骤510：根据相位差控制可调谐激光器改变光载波波长，得到补偿光载波。Step 510: Control the tunable laser to change the wavelength of the optical carrier according to the phase difference to obtain a compensated optical carrier.
本步骤中，需要控制可调谐激光器改变光载波波长为λ+Δλ，使其满足
步骤511：自远端输入宽带射频信号。Step 511: Input a broadband radio frequency signal from a remote end.
此步骤中，远端输入的宽带射频信号最好与中心站的射频频率标准源有所区别，以便更好地区分光载波上的两组信号。在本发明实施例中，自远端分别输入1205MHz和2460MHz的远端射频信号。In this step, the broadband radio frequency signal input by the remote end is preferably different from the radio frequency standard source of the central station, so as to better distinguish two groups of signals on the optical carrier. In the embodiment of the present invention, remote radio frequency signals of 1205 MHz and 2460 MHz are respectively input from the remote end.
步骤512：将远端输入的宽带射频信号调制到远端光信号上，成为远端调制光信号，并回传。Step 512: Modulate the broadband radio frequency signal input from the far end onto the far end optical signal to become a remote modulated optical signal, and transmit it back.
步骤513：将远端调制光信号进行放大。Step 513: Amplify the remote modulated optical signal.
步骤514：将放大后的远端调制光信号解调为稳定远端射频信号。Step 514: Demodulate the amplified remote modulated optical signal into a stable remote radio frequency signal.
步骤515：将解调后的稳定远端射频信号进行滤波，并输出。Step 515: Filter the demodulated stable remote radio frequency signal and output it.
至此，则完成了本发明实施例对光纤链路进行色散时延补偿，并自远端输入，自中心站接收稳定回传的远端射频信号的全过程。So far, the embodiment of the present invention completes the whole process of performing dispersion delay compensation on the optical fiber link, inputting from the remote end, and receiving the stable returned remote radio frequency signal from the central station.
需要说明的是，上述基于图5的所有流程描述是本发明宽带的信号时延稳定传输方法的一种优选的实现过程，在本发明稳频传输方法的实际实现中，可以根据需要在图2所示流程的基础上进行任意变形，可以是选择图5中的任意步骤来实现，各步骤的先后顺序也可以根据需要调整等。It should be noted that all the process descriptions above based on Figure 5 are a preferred implementation process of the wideband signal delay stable transmission method of the present invention. In the actual implementation of the frequency stable transmission method of the present invention, it can be shown in Figure 2 Arbitrary deformation on the basis of the flow shown can be achieved by selecting any step in FIG. 5 , and the order of each step can also be adjusted as required.
本发明实施例的两信号在补偿前后的相位噪声抑制因子均可达到30，并且随着测试时间的增加，抑制效果会进一步提高。可见，本发明实施例对光纤链路相位时延的抑制作用明显。The phase noise suppression factors of the two signals before and after compensation in the embodiment of the present invention can reach 30, and the suppression effect will be further improved as the test time increases. It can be seen that the embodiment of the present invention has a significant suppression effect on the phase delay of the optical fiber link.
可见，本发明实施例具有如下有益效果：It can be seen that the embodiments of the present invention have the following beneficial effects:
在本发明实施例提出的宽带的信号时延稳定传输方法和系统中，通过比较往返传递的回传射频信号和射频频率标准信号的相位差，得出光纤链路的时延抖动，然后利用可调谐激光器改变激光波长，通过不同波长在光纤中传递时产生不同的色散时延来补偿这种抖动，最后实现远端稳定频率和相位的射频信号输出。本发明实施例利用光纤同时作为传输介质和补偿器件，无需添加额外的补偿器件来实现相位抖动补偿过程，系统结构简单，实用性强。In the broadband signal delay stable transmission method and system proposed in the embodiment of the present invention, the delay jitter of the optical fiber link is obtained by comparing the phase difference between the return radio frequency signal transmitted back and forth and the radio frequency standard signal, and then using the available The tuning laser changes the laser wavelength, and compensates the jitter by producing different dispersion delays when different wavelengths are transmitted in the optical fiber, and finally realizes the output of radio frequency signals with stable frequency and phase at the far end. In the embodiment of the present invention, the optical fiber is used as the transmission medium and the compensation device at the same time, and no additional compensation device is needed to realize the phase shake compensation process. The system structure is simple and the practicability is strong.
另外，本发明实施例通过改变激光波长来得到不同的色散时延以补偿光纤链路抖动，补偿范围更大，并且由于色散时延与光纤的长度成正比，光纤越长，补偿的范围也越大；同时，本发明实施例能够保证光纤链路的总时延保持恒定，能够在链路上调节不同频率的射频频率标准信号并进行传递，所传递链路的带宽大，并且适用于时间信号的传输。In addition, the embodiment of the present invention obtains different dispersion delays by changing the laser wavelength to compensate for fiber link jitter, and the compensation range is larger, and since the dispersion delay is proportional to the length of the optical fiber, the longer the optical fiber, the wider the compensation range. At the same time, the embodiment of the present invention can ensure that the total delay of the optical fiber link remains constant, and can adjust and transmit radio frequency standard signals of different frequencies on the link. The bandwidth of the transmitted link is large, and it is suitable for time signal transmission.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662454.0A CN103701529A (en) | 2013-12-09 | 2013-12-09 | Signal time delay stable transmission method and system of broadband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662454.0A CN103701529A (en) | 2013-12-09 | 2013-12-09 | Signal time delay stable transmission method and system of broadband |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103701529A true CN103701529A (en) | 2014-04-02 |
Family
ID=50362941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310662454.0A Pending CN103701529A (en) | 2013-12-09 | 2013-12-09 | Signal time delay stable transmission method and system of broadband |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103701529A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065416A (en) * | 2014-06-26 | 2014-09-24 | 中国科学院半导体研究所 | Microwave signal optical fiber phase stable transmission system based on microwave phase shifter |
| CN104618024A (en) * | 2015-01-04 | 2015-05-13 | 西南交通大学 | Anonymous microwave signal long-distance optical fiber phase-stable transmission device eliminating coherent Rayleigh noise |
| CN105262544A (en) * | 2015-11-09 | 2016-01-20 | 东北林业大学 | Tunable dispersion compensation device based on annular resonant cavity |
| CN108494489A (en) * | 2018-03-27 | 2018-09-04 | 电子科技大学 | A kind of radiofrequency signal surely mutually transmits device and method |
| CN110752876A (en) * | 2019-10-18 | 2020-02-04 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Long-distance distributed large dynamic microwave optical fiber phase-stabilizing transmission system and method |
| CN111342899A (en) * | 2020-03-23 | 2020-06-26 | 电子科技大学 | Optical fiber conjugate phase-stable transmission method |
| CN111934773A (en) * | 2020-08-12 | 2020-11-13 | 中国电子科技集团公司第四十四研究所 | Distributed optical fiber broadband phase-stable transmission distribution system and method based on loop topology |
| CN112104429A (en) * | 2020-09-17 | 2020-12-18 | 电子科技大学 | Femtosecond laser-based underwater frequency transmission system and method |
| CN112187346A (en) * | 2020-09-18 | 2021-01-05 | 中国人民解放军海军工程大学 | Round-trip time delay difference estimation method for optical fiber time transmission under temperature change |
| CN112291015A (en) * | 2020-08-19 | 2021-01-29 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | STM32 processor-based microwave phase-stable transmission system and method |
| CN113985129A (en) * | 2021-11-30 | 2022-01-28 | 中国电子科技集团公司第三十四研究所 | Phase difference signal optical fiber real-time transmission device and method |
| CN114598391A (en) * | 2020-12-03 | 2022-06-07 | 北京大学 | A Realization Method of Remote True Delay Beamforming Based on FMF |
| CN114726443A (en) * | 2022-02-25 | 2022-07-08 | 中国电子科技集团公司第二十九研究所 | Microwave photonic bidirectional time-frequency transmission system, device and method |
| CN115225246A (en) * | 2022-07-11 | 2022-10-21 | 北京邮电大学 | Phase modulation bidirectional time synchronization device, method and system |
| WO2022242622A1 (en) * | 2021-05-19 | 2022-11-24 | 中兴通讯股份有限公司 | Signal processing method and apparatus, and computer readable storage medium |
| CN116094593A (en) * | 2023-04-12 | 2023-05-09 | 山东新科凯邦通信器材有限公司 | Signal detection method based on optical fiber communication |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008062129A1 (en) * | 2008-12-16 | 2010-06-17 | Tesa Se | Self-adhesive base polymer for electroluminescent materials |
| CN102801469A (en) * | 2012-09-11 | 2012-11-28 | 中国人民解放军理工大学 | Optical fiber time frequency hybrid transmission method |
-
2013
- 2013-12-09 CN CN201310662454.0A patent/CN103701529A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008062129A1 (en) * | 2008-12-16 | 2010-06-17 | Tesa Se | Self-adhesive base polymer for electroluminescent materials |
| CN102801469A (en) * | 2012-09-11 | 2012-11-28 | 中国人民解放军理工大学 | Optical fiber time frequency hybrid transmission method |
Non-Patent Citations (1)
| Title |
|---|
| ANXU ZHANG等: ""Stabel radio frequency delivery by dispersion induced optical tunable delay"", 《OPTICS LETTERS》 * |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065416A (en) * | 2014-06-26 | 2014-09-24 | 中国科学院半导体研究所 | Microwave signal optical fiber phase stable transmission system based on microwave phase shifter |
| CN104065416B (en) * | 2014-06-26 | 2016-06-08 | 中国科学院半导体研究所 | Based on the microwave signal stabilized fiber phase transmission system of microwave phase shifter |
| CN104618024A (en) * | 2015-01-04 | 2015-05-13 | 西南交通大学 | Anonymous microwave signal long-distance optical fiber phase-stable transmission device eliminating coherent Rayleigh noise |
| CN104618024B (en) * | 2015-01-04 | 2017-01-11 | 西南交通大学 | Anonymous microwave signal long-distance optical fiber phase-stable transmission device eliminating coherent Rayleigh noise |
| CN105262544A (en) * | 2015-11-09 | 2016-01-20 | 东北林业大学 | Tunable dispersion compensation device based on annular resonant cavity |
| CN105262544B (en) * | 2015-11-09 | 2017-12-22 | 东北林业大学 | Tunable chromatic dispersion compensation device based on ring resonator |
| CN108494489A (en) * | 2018-03-27 | 2018-09-04 | 电子科技大学 | A kind of radiofrequency signal surely mutually transmits device and method |
| CN110752876A (en) * | 2019-10-18 | 2020-02-04 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Long-distance distributed large dynamic microwave optical fiber phase-stabilizing transmission system and method |
| CN111342899B (en) * | 2020-03-23 | 2022-09-06 | 电子科技大学 | Optical fiber conjugate phase-stable transmission method |
| CN111342899A (en) * | 2020-03-23 | 2020-06-26 | 电子科技大学 | Optical fiber conjugate phase-stable transmission method |
| CN111934773B (en) * | 2020-08-12 | 2021-06-08 | 中国电子科技集团公司第四十四研究所 | Distributed optical fiber broadband phase-stable transmission distribution system and method based on loop topology |
| CN111934773A (en) * | 2020-08-12 | 2020-11-13 | 中国电子科技集团公司第四十四研究所 | Distributed optical fiber broadband phase-stable transmission distribution system and method based on loop topology |
| CN112291015A (en) * | 2020-08-19 | 2021-01-29 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | STM32 processor-based microwave phase-stable transmission system and method |
| CN112104429A (en) * | 2020-09-17 | 2020-12-18 | 电子科技大学 | Femtosecond laser-based underwater frequency transmission system and method |
| CN112104429B (en) * | 2020-09-17 | 2021-08-17 | 电子科技大学 | An underwater frequency transfer system and method based on femtosecond laser |
| CN112187346A (en) * | 2020-09-18 | 2021-01-05 | 中国人民解放军海军工程大学 | Round-trip time delay difference estimation method for optical fiber time transmission under temperature change |
| CN114598391A (en) * | 2020-12-03 | 2022-06-07 | 北京大学 | A Realization Method of Remote True Delay Beamforming Based on FMF |
| CN114598391B (en) * | 2020-12-03 | 2023-11-07 | 北京大学 | A remote true delay beamforming implementation method based on few-mode fiber |
| WO2022242622A1 (en) * | 2021-05-19 | 2022-11-24 | 中兴通讯股份有限公司 | Signal processing method and apparatus, and computer readable storage medium |
| CN113985129A (en) * | 2021-11-30 | 2022-01-28 | 中国电子科技集团公司第三十四研究所 | Phase difference signal optical fiber real-time transmission device and method |
| CN114726443A (en) * | 2022-02-25 | 2022-07-08 | 中国电子科技集团公司第二十九研究所 | Microwave photonic bidirectional time-frequency transmission system, device and method |
| CN114726443B (en) * | 2022-02-25 | 2023-09-19 | 中国电子科技集团公司第二十九研究所 | Microwave photon bidirectional time-frequency transmission system, device and method |
| CN115225246A (en) * | 2022-07-11 | 2022-10-21 | 北京邮电大学 | Phase modulation bidirectional time synchronization device, method and system |
| CN115225246B (en) * | 2022-07-11 | 2023-12-01 | 北京邮电大学 | Phase modulation two-way time synchronization device, method and system |
| CN116094593A (en) * | 2023-04-12 | 2023-05-09 | 山东新科凯邦通信器材有限公司 | Signal detection method based on optical fiber communication |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103701529A (en) | Signal time delay stable transmission method and system of broadband | |
| CN103716090A (en) | Stable frequency transmission method and system | |
| CN104065416B (en) | Based on the microwave signal stabilized fiber phase transmission system of microwave phase shifter | |
| CN103501199B (en) | Phase place regulation device and method that radiofrequency signal stabilized fiber transmits mutually | |
| CN102591091B (en) | Method and system for generating photon microwave signal with stable phase | |
| CN102215104A (en) | Delay-locked-loop-based remote microwave signal phase-stabilized optical fiber transmission device | |
| CN103716089A (en) | RF signal optical fiber phase-stabilized transmission method and system | |
| CN104202090B (en) | The microwave signal long-distance optical fiber steady phase transmitting device of optically-based phase conjugation | |
| CN103957093B (en) | Signal stable-phase back transmission system and method based on frequency synchronization | |
| CN107682087B (en) | A Microwave Optical Fiber Phase-Stable Transmission Method Eliminating Local Oscillator Leakage in Passive Phase Correction | |
| Lin et al. | Differentiator-based photonic instantaneous frequency measurement for radar warning receiver | |
| CN107409000B (en) | A kind of coherent receiver, the method and system of coherent source offset estimation and compensation | |
| CN111342899B (en) | Optical fiber conjugate phase-stable transmission method | |
| CN103634093A (en) | Microwave distance measurement and time synchronization system and method based on frequency synchronization | |
| Jiang et al. | Photonic-assisted microwave frequency measurement system based on a silicon ORR | |
| JP2017225017A (en) | Optical transmission equipment | |
| Pan et al. | Passive phase correction for stable radio frequency transfer via optical fiber | |
| KR20170008975A (en) | apparatus and method for free space coherent optical communications with automatic compensation of phase noise in atmosphere using the optical comb of femtosecond lasers | |
| CN112367120A (en) | Microwave local oscillation source double-frequency optical fiber phase-stabilizing transmission system | |
| CN203933635U (en) | Utilize device and the system of Optical Fiber Transmission frequency time standard signal | |
| US20230032715A1 (en) | One-way optical link for precision frequency transfer between stationary or moving platforms | |
| Jiang et al. | Precise time delay sensing and stable frequency dissemination on arbitrary intermediate point along fiber-optic loop link with RF phase locking assistance | |
| Hu et al. | Stable radio frequency transmission of single optical source over fiber based on passive phase compensation | |
| US20140255039A1 (en) | Establishing optical coherence using free-space optical links | |
| Li et al. | Performance evaluation at the remote site for RF frequency dissemination over fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140402 |
|
| RJ01 | Rejection of invention patent application after publication |