WO2010118662A1 - 一种产生、接收相位偏振调制信号的方法、装置和系统 - Google Patents

一种产生、接收相位偏振调制信号的方法、装置和系统 Download PDF

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Publication number
WO2010118662A1
WO2010118662A1 PCT/CN2010/071448 CN2010071448W WO2010118662A1 WO 2010118662 A1 WO2010118662 A1 WO 2010118662A1 CN 2010071448 W CN2010071448 W CN 2010071448W WO 2010118662 A1 WO2010118662 A1 WO 2010118662A1
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Prior art keywords
phase
sub
service data
polarization
signal
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PCT/CN2010/071448
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English (en)
French (fr)
Inventor
徐晓庚
刘磊
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP10764075.7A priority Critical patent/EP2421180B1/en
Publication of WO2010118662A1 publication Critical patent/WO2010118662A1/zh
Priority to US13/272,896 priority patent/US8687979B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/532—Polarisation modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/548—Phase or frequency modulation
    • H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
    • H04B10/5561—Digital phase modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver

Definitions

  • a method, device and system for generating and receiving a phase polarization modulated signal are claimed in the Chinese Patent Office on April 13, 2009, and the application number is 200910106643.3, and the invention is entitled "A method for generating and receiving a phase polarization modulated signal"
  • the priority of the Chinese Patent Application the entire disclosure of which is incorporated herein by reference.
  • the present invention relates to the field of communication transmission, and in particular, to a method, apparatus and system for generating and receiving a phase polarization modulated signal.
  • the main high-end line bearer rate of the optical transport network is 10 Gb/s
  • the high-end bearer line rate of the next-generation optical network is
  • the optical line modulation pattern is very important for the optical transmission system.
  • the choice of the pattern directly affects the transmission performance, optical efficiency, nonlinear tolerance, dispersion tolerance, and the like of the system.
  • a schematic diagram of generating a DQPSK optical signal in the prior art is shown in FIG.
  • two sub-service data signals are generated, and respectively input into the pre-encoding unit for pre-coding processing to obtain an I signal and a Q signal.
  • the I and Q signals are input to the arms of the dual parallel modulator, respectively.
  • LD lasers are used to provide optical signals to dual parallel modulators.
  • the optical signal provided by the LD laser is modulated by a dual parallel modulator to output a DQPSK optical signal carrying the service data.
  • a schematic diagram of the pulse of the prior art DQPSK optical signal is shown in FIG.
  • the traffic data is represented by the phase difference of adjacent pre- and post-pulses of the DQPSK optical signal. For example, information is carried by a phase change between pulse 6 and pulse 5.
  • the subscript in the figure shows the pulse sequence, and ⁇ /4 is the phase information of the pulse.
  • a schematic diagram of a prior art DQPSK optical signal constellation is shown in FIG. Due to the four-phase modulation technique, the DQPSK optical signal has four constellation points 1, 2, 3, and 4 on the constellation.
  • the method carries a higher rate of information transmission; and since the polarization between adjacent symbols of the prior art DQPSK signal is the same, the interference effect cannot be avoided, and the nonlinear effect is strong in transmission.
  • Embodiments of the present invention provide an apparatus for generating and receiving a phase polarization modulated signal, which solves the problem that the DQPSK signal of the prior art cannot carry a higher rate of information and has a strong nonlinear effect in transmission.
  • An apparatus for generating a phase polarization modulated signal comprising: a laser, a time division demultiplexing device, a phase precoding module, a phase modulation module, a polarization precoding module, and a polarization modulation module, wherein the laser is configured to output an optical signal;
  • the time demultiplexing device is configured to decompose the service data to be transmitted into the first sub service data and the second sub service data;
  • the phase precoding module is configured to perform phase on the first sub service data.
  • Precoding processing to obtain phase pre-coded first sub-service data the phase modulation module, configured to phase-modulate the phase-precoded first sub-service data on the optical signal to obtain phase modulation a first sub-service data optical signal
  • the polarization pre-coding module configured to perform polarization pre-coding processing on the second sub-service data, to obtain a second sub-service data after polarization pre-coding; And using the polarization-precoded second sub-service data and the phase-modulated first sub-service data optical signal to be biased Modulation, polarization modulation signal to obtain the phase.
  • a device for receiving a phase polarization modulated signal comprising: a beam splitter, a polarizer, a phase receiving demodulation unit, a polarization beam splitter, a balanced receiver, a power divider, an XOR device, a delay device, and a data interface processing unit
  • the splitter is configured to receive a phase polarization modulated signal, and divide the phase polarization modulated signal into a first sub-phase polarization modulated signal and a second sub-phase polarization modulated signal
  • the polarizer is configured to: Decentralizing the first sub-phase polarization modulated signal to obtain a first sub-phase polarization modulated signal that is polarized; and the phase receiving demodulating unit is configured to perform the first sub-phase polarization modulated signal after the polarizing Demodulating reception, outputting the demodulated first sub-phase polarization modulation signal
  • the polarization beam splitter configured to perform polarization selective beam splitting processing on the second sub-phase polarization modulation signal
  • Embodiments of the present invention also provide a method of generating and receiving a phase polarization modulated signal.
  • a method for generating a phase polarization modulated signal comprising: decomposing service data to be transmitted into first sub-service data and second sub-service data; performing phase pre-coding processing on the first sub-service data to obtain a phase pre- Encoding the first sub-service data; performing phase modulation on the phase-precoded first sub-service data to obtain a phase-modulated first sub-service data optical signal; and performing polarization on the second sub-service data Performing a precoding process to obtain a second sub-service data after polarization precoding; performing polarization modulation on the polarization-precoded second sub-service data and the phase-modulated first sub-service data optical signal to obtain a phase polarization modulated signal .
  • a method for receiving a phase polarization modulated signal comprising: dividing a phase polarization modulated signal into a first sub-phase polarization modulated signal and a second sub-phase polarization modulated signal; and polarizing the first sub-phase polarization modulated signal to obtain a first sub-phase polarization modulated signal after the polarization; demodulating and receiving the polarized first sub-phase polarization modulated signal, outputting the demodulated first sub-phase polarization modulated signal; and polarizing the second sub-phase
  • the modulated signal is subjected to polarization selective beam splitting processing, an X-polarized light signal and a Y-polarized light signal are obtained; the X-polarized light signal and the Y-polarized light signal are balancedly received, and the received received electrical signal is output; the balanced receiving is performed
  • the latter electrical signal is divided into two electrical signals, and one of the two electrical signals passes through the delay device, passes through the XOR device together with the other of the two electrical signals,
  • Sub-phase polarization modulated signal performing time division multiplexing processing on the demodulated first sub-phase polarization modulated signal and the demodulated second sub-phase polarization modulated signal Business data.
  • Embodiments of the present invention also provide a system for generating and receiving a phase polarization modulated signal, including the apparatus for generating a phase polarization modulated signal and the apparatus for receiving a phase polarization modulated signal as described above.
  • each phase of the generated phase polarization modulated signal that is, one constellation point can carry 3 bits or by combining phase modulation and polarization modulation at the signal transmitting end.
  • 4-bit information compared with the prior art DQPSK signal (which carries 2 bits of information per pulse), the spectral efficiency is improved by 1.5 times to 2 times, so that the optical signal transmission method used in the embodiment of the present invention is transmitted. Carrying higher-speed service information, meeting the higher demand of the ever-increasing service capacity of the transmission network; and, since the phase-polarized modulated signal is polarization-modulated, the polarization state of the phase-polarized modulated signal exists only in X.
  • FIG. 1 is a schematic diagram of an apparatus for generating a DQPSK optical signal in the prior art
  • FIG. 2 is a schematic diagram showing the pulse of a prior art DQPSK optical signal
  • FIG. 3 is a schematic diagram showing a prior art DQPSK optical signal constellation
  • FIG. 4 is a schematic diagram of an apparatus for generating a phase polarization modulated signal according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic diagram of an apparatus for generating a phase polarization modulated signal according to Embodiment 2 of the present invention
  • FIG. 6 is a third embodiment of the present invention
  • FIG. 7 is a schematic diagram of a device for receiving a phase polarization modulated signal according to Embodiment 4 of the present invention
  • FIG. 8 is a flow chart showing a method for generating a phase polarization modulated signal according to Embodiment 1 of the present invention
  • FIG. 9 is a flow chart showing a method of receiving a phase polarization modulated signal according to Embodiment 4 of the present invention.
  • FIG. 1 A schematic diagram of a device for generating a phase polarization modulated signal according to Embodiment 1 of the present invention is shown in FIG. Including, a laser (LD) for outputting an optical signal.
  • the time division multiplexing device is configured to decompose the service data to be transmitted into the first sub service data and the second sub service data.
  • the laser In order to meet the requirements of an optical communication system, it is required that the laser can stably output a wavelength.
  • the time-demultiplexing device used in the embodiment of the present invention decomposes the service data to be transmitted into two-way service data after being demultiplexed and processed by the interpolating method.
  • the specific form can be obtained in two forms by 1: 2 or 1: 4, for various implementations, by dividing the electrical signal by power and selecting the data through the selection switch, thereby obtaining two-way service data.
  • the phase precoding module is configured to perform phase precoding processing on the first sub service data to obtain phase precoded first sub service data.
  • the specific processing of the phase precoding is to input the first sub-service data into the coding unit in the phase pre-coding module, and the coding unit delays the feedback signal of the service data signal output by the coding unit by 1 bit, and then The first sub-service data is differentially encoded, and finally the phase-precoded first sub-service data is output.
  • the phase modulation module is configured to perform phase modulation on the phase-precoded first sub-service data to obtain a phase-modulated first sub-service data optical signal.
  • the phase modulation module in the embodiment of the present invention may be a phase modulator or an MZM modulator.
  • the polarization precoding module is configured to perform polarization precoding processing on the second sub service data to obtain second sub-service data after polarization precoding.
  • the specific processing of the polarization precoding is to input the second sub-service data into the coding unit in the polarization pre-encoding module, and the coding unit delays the feedback signal of the service data signal output by the coding unit by 1 bit, and then The second sub-service data is differentially encoded, and finally the second sub-service data after polarization pre-coding is output.
  • the polarization precoding process is used to avoid the noise variation introduced by the polarization change.
  • the polarization modulation module is configured to perform polarization modulation on the polarization precoded second sub-service data and the phase-modulated first sub-service data optical signal to obtain a phase polarization modulated signal.
  • Polarization modulation module light The polarization of the signal is modulated.
  • the main principle is that the optical signal passes through the polarization beam splitter.
  • PBS Polarization Beam Splitter
  • each pulse of the generated phase polarization modulated signal that is, a constellation point can carry 3 bits or 4 bits of information, and present Compared with the technical DQPSK signal (which carries 2 bits of information per pulse), the spectral efficiency is improved by 1.5 times to 2 times, so that the optical signal transmission mode used in the embodiment of the present invention carries a higher rate of service.
  • the information satisfies the higher demand of the ever-increasing service capacity of the transmission network; moreover, since the phase-polarized modulated signal is subjected to polarization modulation, the polarization state of the phase-polarized modulated signal is only ⁇ / ⁇ polarization, two positive The polarization state of the intersection is that no interference will occur. Therefore, the interference effect in the transmission of the optical signal is reduced by the polarization-keyed modulation. At the same time, due to the use of differential encoding, the noise floor of adjacent pulses is cancelled, thereby greatly improving the transmission performance of the optical signal.
  • phase precoding module in the first embodiment is specifically a D8PSK precoding module (Differential 8 Phase Shift Keying) for using the first sub service data.
  • D8PSK precoding module Different 8 Phase Shift Keying
  • the subsequent business data is selected by interleaving.
  • the differential encoding of the pre-encoding processing of the data to be transmitted in the embodiment of the present invention is implemented on the electrical domain, and the data before encoding and the encoded data are both in the form of NRZ (Non Return-to-Zero).
  • the principle of the encoding method is that the original bit information before encoding is represented by the change of the amplitudes of the two bits before and after the encoding, that is, when the original information is '0, the amplitude of the corresponding subsequent bit after encoding is the same as the previous one. The amplitude of the bits is the same.
  • the phase modulation module specifically includes a QPSK modulation unit and a phase modulation unit.
  • a QPSK modulation unit configured to perform quadrature phase modulation on two of the three-way phase pre-coded service data to obtain a QPSK-modulated optical signal
  • a phase modulation unit configured to pre-stage the three-way phase One of the encoded service data and the QPSK-modulated optical signal are subjected to two-phase modulation, and the phase-modulated first sub-service data optical signal is output.
  • each pulse of the generated phase polarization modulated signal that is, a constellation point can carry 4 bits of information
  • the prior art Compared with the DQPSK signal (which carries 2 bits of information per pulse), the spectral efficiency is improved by 2 times, so that the optical signal transmission mode used in the embodiment of the present invention carries a higher rate of industry, satisfying the constant The increased demand placed by the increased capacity of the transport network.
  • the phase precoding module is specifically a DQPSK (Differential Quadrature Phase Shift Keying) precoding module, configured to perform phase precoding processing on the first sub service data to obtain a phase pre-coding.
  • the first sub-service data after the phase pre-coding is divided into two phase pre-coded service data; the two-way phase pre-coded service data is selected by interpolating The way to select.
  • the phase modulation module specifically includes a QPSK modulation unit configured to perform quadrature phase modulation on the two phase precoded service data, and output the phase modulated first sub service data optical signal.
  • the embodiment of the present invention combines phase modulation and polarization modulation at the signal transmitting end, so that each pulse of the generated phase polarization modulated signal, that is, a constellation point can carry 3 bits of information, and the prior art Compared with the DQPSK signal (which carries 2 bits of information per pulse), the optical language efficiency is improved by 1.5 times, so that the optical signal transmission method used in the embodiment of the present invention carries a higher load.
  • the rate of business information satisfies the increased demand placed by the ever-increasing traffic capacity of the transport network.
  • a beam splitter for receiving a phase polarization modulated signal, and dividing the received phase polarization modulated signal into a first sub-phase polarization modulated signal and a second sub-phase polarization modulated signal; a polarizer for A sub-phase polarization modulation signal is subjected to a polarization process to obtain a first sub-phase polarization modulation signal after the polarization; and the polarizer selects one of the first sub-phase polarization modulation signals by using a birefringence effect of the crystal.
  • phase receiving demodulating unit configured to demodulate and receive the first sub-phase polarization modulated signal after the offset, and output the demodulated first sub-phase polarization modulated signal;
  • the specific processing process of the phase receiving demodulating unit is: first The received optical signal is subjected to spectral processing, and then the delayed optical signal is subjected to delay, interference, and photoelectric conversion processing to obtain a demodulated first sub-phase polarization modulated signal.
  • a polarization beam splitter configured to perform polarization selective beam splitting processing on the second sub-phase polarization modulated signal to obtain an X-polarized light signal and a Y-polarized light signal.
  • a balanced receiver for performing balanced reception on the X-polarized light signal and the Y-polarized light signal, and outputting the balanced received electrical signal;
  • the specific processing of the balanced receiver is: receiving the X-polarized light signal and Y
  • the polarized light signal is photoelectrically converted to obtain two electrical signals, and then the two electrical signals are subtracted to obtain a balanced received electrical signal.
  • a power splitter configured to divide the balanced received electrical signal into two electrical signals, one of the two electrical signals passing through the delay device, and the other of the two electrical signals
  • the demodulated second sub-phase polarization modulated signal is outputted through the XOR device together.
  • the delay device is an electrical delay device that obtains a 1-bit delay by changing the length of the transmission cable.
  • the data interface processing unit is configured to perform time division multiplexing processing on the demodulated first sub-phase polarization modulated signal and the demodulated second sub-phase polarization modulated signal to obtain service data.
  • the phase receiving demodulation unit is specifically a D8PSK receiving demodulation unit, or a DQPSK receiving demodulation unit.
  • the D8PSK receives a demodulation unit for biasing the first sub-phase after the offset
  • the modulating signal is demodulated and received, and the demodulated first sub-phase polarization modulating signal is output;
  • the specific processing process of the D8PSK receiving demodulating unit is: first, splitting the received optical signal, and then splitting the split three-way light
  • the signal is subjected to delay, interference, and photoelectric conversion processing to obtain a demodulated first sub-phase polarization modulated signal.
  • the DQPSK receiving demodulation unit is configured to demodulate and receive the first sub-phase polarization modulated signal after the offset, and output the demodulated first sub-phase polarization modulated signal; the specific processing process of the DQPSK receiving demodulation unit is: The received optical signal is subjected to spectral processing, and then subjected to delay, interference, and photoelectric conversion processing on the split two optical signals to obtain a demodulated first sub-phase polarization modulated signal.
  • Step 801 Decompose the service data to be transmitted into the first sub-service data and the second sub-service data.
  • Step 802 Perform phase pre-coding processing on the first sub-service data to obtain phase pre-coded first sub-service data.
  • Step 803 Perform phase modulation on the phase-precoded first sub-service data to obtain a phase-modulated first sub-service data optical signal.
  • Step 804 Perform polarization precoding processing on the second sub-service data to obtain a second sub-service data after polarization pre-coding.
  • Step 805 Perform polarization modulation on the polarization-precoded second sub-service data and the phase-modulated first sub-service data optical signal to obtain a phase polarization modulated signal.
  • the first sub-service data is phase-pre-coded, and the first sub-service data obtained by the phase pre-coding is specifically the first sub-service data.
  • the phase precoding process is performed to obtain three-way phase pre-coded service data.
  • Step 803 in the embodiment of the present invention performing phase modulation on the phase-precoded first sub-service data, and obtaining the phase-modulated first sub-service data optical signal, specifically, pre-coding the three-way phase Two of the service data are subjected to quadrature phase modulation to obtain a QPSK modulated optical signal;
  • the other one of the three-way phase precoded service data and the QPSK-modulated optical signal are subjected to two-phase modulation, and the phase-modulated first sub-service data optical signal is output.
  • each pulse of the generated phase polarization modulated signal that is, a constellation point can carry 4 bits of information
  • the prior art Compared with the DQPSK signal (which carries 2 bits of information per pulse), the spectral efficiency is improved by 2 times, so that the optical signal transmission mode used in the embodiment of the present invention carries a higher rate of industry, satisfying the constant The increased demand placed by the increased capacity of the transport network.
  • the first sub-service data is phase-pre-coded, and the first sub-service data obtained by the phase pre-coding is specifically the first sub-service data.
  • the phase precoding process is performed to obtain two phase precoded service data.
  • Step 803 in the embodiment of the present invention performing phase modulation on the phase-precoded first sub-service data, and obtaining the phase-modulated first sub-service data optical signal, specifically, pre-coding the two-way phase
  • the service data is subjected to quadrature phase modulation, and the phase-modulated first sub-service data optical signal is output.
  • the embodiment of the present invention combines phase modulation and polarization modulation at the signal transmitting end, so that each pulse of the generated phase polarization modulated signal, that is, a constellation point can carry 3 bits of information, and the prior art Compared with the DQPSK signal, which has 2 bits of information per pulse, the spectral efficiency is improved by 1.5 times, so that the optical signal transmission mode used in the embodiment of the present invention carries a higher rate of service information, which satisfies the increasing The business has a higher demand for the capacity of the transmission network.
  • Step 901 The phase polarization modulated signal is divided into a first sub-phase polarization modulated signal and a second sub-phase polarization modulated signal.
  • Step 902 Perform a polarization process on the first sub-phase polarization modulation signal to obtain a first sub-phase polarization modulation signal after the polarization.
  • Step 903 Demodulate and receive the first sub-phase polarization modulated signal after the offset, and output the demodulated first sub-phase polarization modulated signal.
  • Step 904 after performing polarization selective beam splitting processing on the second sub-phase polarization modulated signal, obtaining an X-polarized light signal and a Y-polarized light signal.
  • Step 905 Balance receiving the X-polarized light signal and the Y-polarized light signal, and outputting the balanced received electrical signal.
  • Step 906 the balanced received electrical signal is divided into two electrical signals, and one of the two electrical signals passes through the delay device, and passes through the XOR device together with the other of the two electrical signals. And outputting the demodulated second sub-phase polarization modulated signal.
  • Step 907 Perform time division multiplexing processing on the demodulated first sub-phase polarization modulated signal and the demodulated second sub-phase polarization modulated signal to obtain service data.
  • the demodulation reception of step 903 in the method for receiving the phase polarization modulated signal is specifically D8PSK demodulation reception and DQPSK demodulation reception.
  • the D8PSK demodulation is received by first performing spectral processing on the received optical signal, and then performing delay, interference, and photoelectric conversion processing on the split three optical signals to obtain a demodulated first sub-phase polarization modulated signal.
  • the DQPSK demodulation receiving process is as follows: first, the received optical signal is split-processed, and then the split two optical signals are subjected to delay, interference, and photoelectric conversion processing to obtain a demodulated first sub-phase polarization modulation. signal.
  • Embodiments of the present invention also provide a transmission system for a phase polarization modulated signal, including the above apparatus for generating a phase polarization modulated signal and the above apparatus for receiving a phase polarization modulated signal.
  • a transmission system for a phase polarization modulated signal including the above apparatus for generating a phase polarization modulated signal and the above apparatus for receiving a phase polarization modulated signal.
  • each pulse of the generated phase polarization modulated signal that is, a constellation point can carry 3 bits or 4 bits of information, and present Compared with the technical DQPSK signal (which carries 2 bits of information per pulse), the spectral efficiency is improved by 1.5 times to 2 times, so that the optical signal transmission mode used in the embodiment of the present invention carries a higher rate of service.
  • the information satisfies the higher demand imposed by the increasing service capacity of the transmission network; moreover, since the phase polarization modulated signal is subjected to polarization modulation, the polarization state of the phase polarization modulated signal only has X/Y polarization, and two positive The polarization state of the intersection is that no interference will occur. Therefore, the interference effect in the optical signal transmission process is reduced by polarization keying modulation. At the same time, due to the use of differential encoding, the noise floor of adjacent pulses is cancelled, thereby greatly improving the transmission performance of the optical signal.

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Description

一种产生、 接收相位偏振调制信号的方法、 装置和系统 本申请要求于 2009 年 4 月 13 日提交中国专利局、 申请号为 200910106643.3, 发明名称为"一种产生、 接收相位偏振调制信号的方法、 装 置和系统"的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信传输领域， 尤其涉及一种产生、接收相位偏振调制信号的 方法、 装置和系统。
背景技术
不断增加的视频业务对传输网络的容量提出了更高的需求。目前光传送网 络的主要高端线路承载速率是 10Gb/s， 下一代光网络高端承载线路速率为
40Gb/s或为比 40Gb/s更高的速率。 同时以太网业务的容量正在以 10倍的速率增 长， 其承载带宽需求也会以 10为因子而增加。
光线路调制码型对光传输系统而言非常关键，码型的选择直接影响系统的 传输性能、 光语效率、 非线性容忍度、 色散容忍度等。 现有技术中产生 DQPSK光信号的示意图如图 1所示。将需要传输的业务数据经过时分解复用器 件处理后， 产生两路子业务数据信号， 分别输入预编码单元进行预编码处理， 得到 I信号和 Q信号。 分别将 I信号和 Q信号输入双平行调制器的两臂。 LD激光 器用于给双平行调制器提供光信号。 LD激光器提供的光信号经过双平行调制 器调制后， 输出携带业务数据的 DQPSK光信号。 现有技术的 DQPSK光信号的 脉冲示意图如图 2所示。 业务数据通过 DQPSK光信号的相邻前后脉冲的相位差 来表示。 例如， 通过在脉冲 6和脉冲 5之间的相位变化来携带信息。 图中下标所 示为脉冲序列， π /4等为脉冲的相位信息。现有技术的 DQPSK光信号星座图示 意图如图 3的示。 DQPSK光信号由于采用四相位调制技术， 因此在星座图上有 4个星座点 1、 2、 3、 4。 发明人在研究程中发现， 现有技术的 DQPSK信号的星座图上仅仅有 4个 星座点， 一个星座点， 只能携带两个比特的信息， 而不断增加的视频、 数据等 传输业务则需要更高的光语效率的调制码型， 因此现有技术的 DQPSK信号无 法承载传输更高速率的信息； 并且由于现有技术的 DQPSK信号的相邻码元之 间的偏振相同， 因此并不能避免干涉效应， 在传输中非线性效应强烈。
发明内容
本发明实施例提供了一种产生、接收相位偏振调制信号的装置，解决了现 有技术的 DQPSK信号无法承载传输更高速率的信息、 在传输中非线性效应强 烈的问题。
一种产生相位偏振调制信号的装置， 包括， 激光器、 时分解复用器件、 相 位预编码模块、相位调制模块、 偏振预编码模块和偏振调制模块， 其中， 所述 激光器， 用于输出光信号； 所述时分解复用器件， 用于将待传输的业务数据分 解为第一子业务数据和第二子业务数据； 所述相位预编码模块， 用于对所述的 第一子业务数据进行相位预编码处理， 得到相位预编码后的第一子业务数据； 所述相位调制模块，用于将所述相位预编码后的第一子业务数据相位调制在所 述光信号上，得到相位调制后的第一子业务数据光信号；所述偏振预编码模块， 用于对所述的第二子业务数据进行偏振预编码处理，得到偏振预编码后的第二 子业务数据； 所述偏振调制模块， 用于对所述偏振预编码后的第二子业务数据 和相位调制后的第一子业务数据光信号进行偏振调制， 得到相位偏振调制信 号。
一种接收相位偏振调制信号的装置， 包括， 分光器、起偏器、 相位接收解 调单元、 偏振分束器、 平衡接收机、 功分器、 异或器、 延时器和数据接口处理 单元， 其中， 所述分光器， 用于接收相位偏振调制信号， 并将所述相位偏振调 制信号分为第一子相位偏振调制信号和第二子相位偏振调制信号； 所述起偏 器， 用于将所述第一子相位偏振调制信号起偏处理，得到起偏后的第一子相位 偏振调制信号； 所述相位接收解调单元， 用于将起偏后的第一子相位偏振调制 信号进行解调接收，输出解调后的第一子相位偏振调制信号；所述偏振分束器， 用于对所述第二子相位偏振调制信号进行偏振选择分束处理后， 得到 X偏振光 信号和 Y偏振光信号； 所述平衡接收机， 用于对所述 X偏振光信号和 Y偏振光 信号进行平衡接收， 输出平衡接收后的电信号； 所述功分器， 用于将所述平衡 接收后的电信号分为两路电信号， 所述两路电信号中的一路通过所述延时器 后， 与所述两路电信号中的另一路一起通过所述异或器，输出解调后的第二子 相位偏振调制信号； 所述数据接口处理单元， 用于将所述解调后的第一子相位 偏振调制信号和所述解调后的第二子相位偏振调制信号进行时分复用处理，得 到业务数据。
本发明实施例还提供了一种产生、 接收相位偏振调制信号的方法。
一种产生相位偏振调制信号的方法， 包括，将待传输的业务数据分解为第 一子业务数据和第二子业务数据；对所述的第一子业务数据进行相位预编码处 理，得到相位预编码后的第一子业务数据； 对所述相位预编码后的第一子业务 数据进行相位调制，得到相位调制后的第一子业务数据光信号； 对所述的第二 子业务数据进行偏振预编码处理，得到偏振预编码后的第二子业务数据； 对所 述偏振预编码后的第二子业务数据和相位调制后的第一子业务数据光信号进 行偏振调制， 得到相位偏振调制信号。
一种接收相位偏振调制信号的方法， 包括，将相位偏振调制信号分为第一 子相位偏振调制信号和第二子相位偏振调制信号；将所述第一子相位偏振调制 信号起偏处理，得到起偏后的第一子相位偏振调制信号； 将起偏后的第一子相 位偏振调制信号进行解调接收，输出解调后的第一子相位偏振调制信号； 对所 述第二子相位偏振调制信号进行偏振选择分束处理后， 得到 X偏振光信号和 Y 偏振光信号； 对所述 X偏振光信号和 Y偏振光信号进行平衡接收， 输出平衡接 收后的电信号； 将所述平衡接收后的电信号分为两路电信号， 所述两路电信号 中的一路通过延时器后， 与所述两路电信号中的另一路一起通过异或器，输出 解调后的第二子相位偏振调制信号；将所述解调后的第一子相位偏振调制信号 和所述解调后的第二子相位偏振调制信号进行时分复用处理， 得到业务数据。 本发明实施例还提供了一种产生、 接收相位偏振调制信号的系统， 包括， 如上所述的产生相位偏振调制信号的装置和接收相位偏振调制信号的装置。
由此可见，在本发明实施例中，通过在信号发送端采用相位调制和偏振调 制相结合的方式，使得所产生的相位偏振调制信号的每个脉冲， 即一个星座点 上可携带 3比特或 4比特的信息， 与现有技术的 DQPSK信号相比 (其每个脉冲携 带 2个比特的信息)， 光谱效率提高了 1.5倍至 2倍， 使得本发明实施例所使用的 光信号的传输方式承载了更高速率的业务信息，满足了不断增加的业务对传输 网络的容量所提出的更高需求；而且，由于相位偏振调制信号经过了偏振调制， 使得相位偏振调制信号的偏振态只存在 X/Y偏振， 两个正交的偏振态是不会发 生干涉的。因此通过偏振键控调制降低了光信号传输过程中的干涉效应。同时， 由于使用了差分编码的方式，抵消了相邻脉冲的噪声基底，从而大大提高了光 信号的传输性能， 有利于产品的实现。 附图说明
此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部 分， 并不构成对本发明的限定。 在附图中：
图 1示出了现有技术中产生 DQPSK光信号的装置示意图；
图 2示出了现有技术的 DQPSK光信号的脉冲示意图；
图 3示出了现有技术的 DQPSK光信号星座图示意图；
图 4示出了本发明实施例一的产生相位偏振调制信号的装置示意图； 图 5示出了本发明实施例二的产生相位偏振调制信号的装置示意图； 图 6示出了本发明实施例三的产生相位偏振调制信号的装置示意图； 图 7示出了本发明实施例四的接收相位偏振调制信号的装置示意图； 图 8示出了本发明实施例一的产生相位偏振调制信号的方法流程示意图； 图 9示出了本发明实施例四的接收相位偏振调制信号的方法流程示意图。 具体实施方式
为了便于本领域一般技术人员理解和实现本发明，现结合附图描绘本发明 的实施例。 在此， 本发明的示意性实施例及其说明用于解释本发明， 但并不作 为对本发明的限定。
本发明实施例一的产生相位偏振调制信号的装置示意图如图 4所示。包括， 激光器 (LD)， 用于输出光信号。 时分解复用器件， 用于将待传输的业务数据分 解为第一子业务数据和第二子业务数据。 为了满足光通信系统的要求， 需要激 光器能够稳定地输出波长。本发明实施例中采用的时分解复用器件，通过间插 选取的方式，将待传输的业务数据进行时分解复用处理后，分解为两路业务数 据。 具体的形式可以通过 1 : 2或者 1 : 4多种形式， 针对各种实现情况， 通过对 电信号进行功分，并且通过选择开关对数据进行选择，从而获得两路业务数据。 相位预编码模块， 用于对所述的第一子业务数据进行相位预编码处理，得到相 位预编码后的第一子业务数据。相位预编码的具体处理过程为，将所述的第一 子业务数据输入相位预编码模块中的编码单元中，编码单元将其输出的业务数 据信号的反馈信号延时 1比特后， 再与所述的第一子业务数据进行差分编码， 最终输出相位预编码后的第一子业务数据。相位调制模块， 用于对所述相位预 编码后的第一子业务数据进行相位调制，得到相位调制后的第一子业务数据光 信号。通过采用差分相位调制的方式，使得相邻脉冲之间的相位差来携带信号， 避免了由于光纤传输引入的相位噪声而带来的误差。本发明实施例中的相位调 制模块可以是相位调制器或者 MZM调制器。 偏振预编码模块， 用于对所述的 第二子业务数据进行偏振预编码处理， 得到偏振预编码后的第二子业务数据。 偏振预编码的具体处理过程为，将所述的第二子业务数据输入偏振预编码模块 中的编码单元中，编码单元将其输出的业务数据信号的反馈信号延时 1比特后， 再与所述的第二子业务数据进行差分编码，最终输出偏振预编码后的第二子业 务数据。 采用偏振预编码处理的方式， 避免了偏振变化引入的噪声变化。 偏振 调制模块，用于对所述偏振预编码后的第二子业务数据和相位调制后的第一子 业务数据光信号进行偏振调制， 得到相位偏振调制信号。 偏振调制模块， 对光 信号的偏振进行调制， 其主要实现原理是， 先对光信号通过偏振分束器
PBS(Polarization Beam Splitter)分解成 X偏振和 Y偏振，通过控制 X偏振和 Υ偏振 之间的相位变化， 从而获得不同的偏振态信息。
本发明实施例通过在信号发送端采用相位调制和偏振调制相结合的方式， 使得所产生的相位偏振调制信号的每个脉冲，即一个星座点上可携带 3比特或 4 比特的信息，与现有技术的 DQPSK信号相比 (其每个脉冲携带 2个比特的信息)， 光谱效率提高了 1.5倍至 2倍， 使得本发明实施例所使用的光信号的传输方式承 载了更高速率的业务信息，满足了不断增加的业务对传输网络的容量所提出的 更高需求； 而且， 由于相位偏振调制信号经过了偏振调制， 使得相位偏振调制 信号的偏振态只存在 Χ/Υ偏振， 两个正交的偏振态是不会发生干涉的。 因此通 过偏振键控调制降低了光信号传输过程中的干涉效应。 同时， 由于使用了差分 编码的方式，抵消了相邻脉冲的噪声基底，从而大大提高了光信号的传输性能。
进一步地， 本发明实施例二的产生相位偏振调制信号的装置示意图如图 5 所示。所做的改动为，将上述实施例一中的相位预编码模块具体为 D8PSK预编 码模块 (Differential 8 Phase Shift Keying,差分八相移键控码），用于对所述的第 一子业务数据进行相位预编码处理，得到相位预编码后的第一子业务数据； 所 述相位预编码后的第一子业务数据分为三路相位预编码后的业务数据；所述的 三路相位预编码后的业务数据是通过间插选取的方式进行选取的。本发明实施 例对待发送的数据进行预编码处理的差分编码是在电域上实现的，编码前的数 据和编码后的数据都是 NRZ ( Non Return-to-Zero, 非归零码）形式， 该编码方 法的原理是， 编码前的原比特信息由编码后的前后两个比特幅度的变化来表 示， 即： 当原信息为 '0， 时， 编码后对应的后一比特的幅度与前一比特的幅 度相同，例如，若前一比特为 '0， ，后一比特为仍为 '0， ；若前一比特为 '1， ， 则后一比特仍为 '1， 。 当原信息为 '1， 时， 编码后对应的后一比特的幅度与 前一比特的不同， 即若前一比特为 '0， ， 则后一比特为 '1， ； 若前一比特为 'Γ ， 则后一比特为 '0， 。 编码后的数据速率保持不变， 且为 NRZ信号， 所 占带宽没有变化。 所述相位调制模块具体包括， QPSK调制单元和相位调制单 元。 QPSK调制单元， 用于将所述三路相位预编码后的业务数据中的其中两路 进行正交相位调制， 得到 QPSK调制后的光信号； 相位调制单元， 用于将所述 三路相位预编码后的业务数据中的其中一路和所述 QPSK调制后的光信号进行 二相位调制， 输出相位调制后的第一子业务数据光信号。
本发明实施例通过在信号发送端采用相位调制和偏振调制相结合的方式， 使得所产生的相位偏振调制信号的每个脉冲， 即一个星座点上可携带 4比特的 信息， 与现有技术的 DQPSK信号相比 (其每个脉冲携带 2个比特的信息)， 光谱 效率提高了 2倍， 使得本发明实施例所使用的光信号的传输方式承载了更高速 率的业 言息， 满足了不断增加的业务对传输网络的容量所提出的更高需求。
进一步地， 本发明实施例三的产生相位偏振调制信号的装置示意图如图 6 所示。 所述的相位预编码模块具体为 DQPSK(Differential Quadrature Phase Shift Keying, 差分正交相移键控码)预编码模块， 用于对所述的第一子业务数据进 行相位预编码处理，得到相位预编码后的第一子业务数据； 所述相位预编码后 的第一子业务数据分为两路相位预编码后的业务数据；所述的两路相位预编码 后的业务数据是通过间插选取的方式进行选取的。
所述相位调制模块具体包括， QPSK调制单元， 用于将所述两路相位预编 码后的业务数据进行正交相位调制， 输出相位调制后的第一子业务数据光信 号。
本发明实施例通过在信号发送端采用相位调制和偏振调制相结合的方式， 使得所产生的相位偏振调制信号的每个脉冲， 即一个星座点上可携带 3比特的 信息， 与现有技术的 DQPSK信号相比 (其每个脉冲携带 2个比特的信息)， 光语 效率提高了 1.5倍， 使得本发明实施例所使用的光信号的传输方式承载了更高 速率的业务信息， 满足了不断增加的业务对传输网络的容量所提出的更高需 求。 本发明实施例四的接收相位偏振调制信号的装置示意图如图 7所示。包括， 分光器， 用于接收相位偏振调制信号， 并将所述接收相位偏振调制信号分为第 一子相位偏振调制信号和第二子相位偏振调制信号；起偏器， 用于将所述第一 子相位偏振调制信号起偏处理，得到起偏后的第一子相位偏振调制信号；起偏 器利用晶体的双折射效应，选取了所述第一子相位偏振调制信号中的一路偏振 信号。相位接收解调单元， 用于将起偏后的第一子相位偏振调制信号进行解调 接收，输出解调后的第一子相位偏振调制信号；相位接收解调单元具体处理过 程为，首先对接收到的光信号进行分光处理，然后对分光后的光信号进行延时、 干涉、 光电转换处理， 得到解调后的第一子相位偏振调制信号。 偏振分束器， 用于对所述第二子相位偏振调制信号进行偏振选择分束处理后， 得到 X偏振光 信号和 Y偏振光信号。 平衡接收机， 用于对所述 X偏振光信号和 Y偏振光信号 进行平衡接收， 输出平衡接收后的电信号； 平衡接收机具体处理过程为， 对接 收到的所述 X偏振光信号和 Y偏振光信号进行光电转换， 得到两路电信号， 然 后对所述两路电信号相减， 得到平衡接收后的电信号。 功分器， 用于将所述平 衡接收后的电信号分为两路电信号，所述两路电信号中的一路通过所述延时器 后， 与所述两路电信号中的另一路一起通过所述异或器，输出解调后的第二子 相位偏振调制信号。 所述延时器为电延时器件， 其通过改变传输电缆的长度， 使信号得到 1比特的延时。 数据接口处理单元， 用于将所述解调后的第一子相 位偏振调制信号和所述解调后的第二子相位偏振调制信号进行时分复用处理， 得到业务数据。
进一步地，与本发明实施例二和所述本发明实施例三的产生相位偏振调制 信号的装置相对应， 所述相位接收解调单元具体为 D8PSK接收解调单元， 或 DQPSK接收解调单元。 D8PSK接收解调单元， 用于将起偏后的第一子相位偏 振调制信号进行解调接收， 输出解调后的第一子相位偏振调制信号； D8PSK 接收解调单元具体处理过程为， 首先对接收到的光信号进行分光处理， 然后对 分光后的三路光信号进行延时、 干涉、 光电转换处理， 得到解调后的第一子相 位偏振调制信号。 DQPSK接收解调单元， 用于将起偏后的第一子相位偏振调 制信号进行解调接收， 输出解调后的第一子相位偏振调制信号； DQPSK接收 解调单元具体处理过程为， 首先对接收到的光信号进行分光处理， 然后对分光 后的两路光信号进行延时、 干涉、 光电转换处理， 得到解调后的第一子相位偏 振调制信号。
本发明实施例一的产生相位偏振调制信号的方法流程示意图如图 8所示。 步骤 801，将待传输的业务数据分解为第一子业务数据和第二子业务数据。 步骤 802， 对所述的第一子业务数据进行相位预编码处理， 得到相位预编 码后的第一子业务数据。
步骤 803， 对所述相位预编码后的第一子业务数据进行相位调制， 得到相 位调制后的第一子业务数据光信号。
步骤 804， 对所述的第二子业务数据进行偏振预编码处理， 得到偏振预编 码后的第二子业务数据。
步骤 805， 对所述偏振预编码后的第二子业务数据和相位调制后的第一子 业务数据光信号进行偏振调制， 得到相位偏振调制信号。
进一步地， 本发明实施例中的步骤 802， 对所述的第一子业务数据进行相 位预编码处理，得到相位预编码后的第一子业务数据具体为，对所述的第一子 业务数据进行相位预编码处理，得到三路相位预编码后的业务数据。本发明实 施例中的步骤 803， 对所述相位预编码后的第一子业务数据进行相位调制， 得 到相位调制后的第一子业务数据光信号具体为，将所述三路相位预编码后的业 务数据中的其中两路进行正交相位调制， 得到 QPSK调制后的光信号； 将所述 三路相位预编码后的业务数据中的另外一路和所述 QPSK调制后的光信号进行 二相位调制， 输出相位调制后的第一子业务数据光信号。
本发明实施例通过在信号发送端采用相位调制和偏振调制相结合的方式， 使得所产生的相位偏振调制信号的每个脉冲， 即一个星座点上可携带 4比特的 信息， 与现有技术的 DQPSK信号相比 (其每个脉冲携带 2个比特的信息)， 光谱 效率提高了 2倍， 使得本发明实施例所使用的光信号的传输方式承载了更高速 率的业 言息， 满足了不断增加的业务对传输网络的容量所提出的更高需求。
进一步地， 本发明实施例中的步骤 802， 对所述的第一子业务数据进行相 位预编码处理，得到相位预编码后的第一子业务数据具体为，对所述的第一子 业务数据进行相位预编码处理，得到两路相位预编码后的业务数据。本发明实 施例中的步骤 803， 对所述相位预编码后的第一子业务数据进行相位调制， 得 到相位调制后的第一子业务数据光信号具体为，将所述两路相位预编码后的业 务数据进行正交相位调制， 输出相位调制后的第一子业务数据光信号。
本发明实施例通过在信号发送端采用相位调制和偏振调制相结合的方式， 使得所产生的相位偏振调制信号的每个脉冲， 即一个星座点上可携带 3比特的 信息， 与现有技术的 DQPSK信号相比 (其每个脉冲携带 2个比特的信息)， 光谱 效率提高了 1.5倍， 使得本发明实施例所使用的光信号的传输方式承载了更高 速率的业务信息， 满足了不断增加的业务对传输网络的容量所提出的更高需 求。
上述方法步骤的具体信号处理、执行过程等内容， 由于与本发明装置实施 例基于同一构想， 可参见本发明装置实施例中的叙述， 此处不再赘述。
本发明实施例四的接收相位偏振调制信号的方法流程示意图如图 9所示。 步骤 901， 将相位偏振调制信号分为第一子相位偏振调制信号和第二子相 位偏振调制信号。 步骤 902， 将所述第一子相位偏振调制信号起偏处理， 得到起偏后的第一 子相位偏振调制信号。
步骤 903， 将起偏后的第一子相位偏振调制信号进行解调接收， 输出解调 后的第一子相位偏振调制信号。
步骤 904， 对所述第二子相位偏振调制信号进行偏振选择分束处理后， 得 到 X偏振光信号和 Y偏振光信号。
步骤 905，对所述 X偏振光信号和 Y偏振光信号进行平衡接收， 输出平衡接 收后的电信号。
步骤 906， 将所述平衡接收后的电信号分为两路电信号， 所述两路电信号 中的一路通过延时器后， 与所述两路电信号中的另一路一起通过异或器，输出 解调后的第二子相位偏振调制信号。
步骤 907， 将所述解调后的第一子相位偏振调制信号和所述解调后的第二 子相位偏振调制信号进行时分复用处理， 得到业务数据。
进一步地， 与本发明实施例一的产生相位偏振调制信号的方法相对应，接 收相位偏振调制信号的方法中的步骤 903的解调接收具体为， D8PSK解调接收 和 DQPSK解调接收。 D8PSK解调接收为， 首先对接收到的光信号进行分光处 理， 然后对分光后的三路光信号进行延时、 干涉、 光电转换处理， 得到解调后 的第一子相位偏振调制信号。 DQPSK解调接收具体处理过程为， 首先对接收 到的光信号进行分光处理， 然后对分光后的两路光信号进行延时、 干涉、 光电 转换处理， 得到解调后的第一子相位偏振调制信号。
上述方法步骤的具体信号处理、执行过程等内容， 由于与本发明装置实施 例基于同一构想， 可参见本发明装置实施例中的叙述， 此处不再赘述。
本发明实施例还提供了一种相位偏振调制信号的传输系统，包括上述的产 生相位偏振调制信号的装置和上述的接收相位偏振调制信号的装置。具体请参 见上述装置的描述。 本发明实施例通过在信号发送端采用相位调制和偏振调制相结合的方式， 使得所产生的相位偏振调制信号的每个脉冲，即一个星座点上可携带 3比特或 4 比特的信息，与现有技术的 DQPSK信号相比 (其每个脉冲携带 2个比特的信息)， 光谱效率提高了 1.5倍至 2倍， 使得本发明实施例所使用的光信号的传输方式承 载了更高速率的业务信息，满足了不断增加的业务对传输网络的容量所提出的 更高需求； 而且， 由于相位偏振调制信号经过了偏振调制， 使得相位偏振调制 信号的偏振态只存在 X/Y偏振， 两个正交的偏振态是不会发生干涉的。 因此通 过偏振键控调制降低了光信号传输过程中的干涉效应。 同时， 由于使用了差分 编码的方式，抵消了相邻脉冲的噪声基底，从而大大提高了光信号的传输性能。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到本发明 可借助软件加必需的硬件平台的方式来实现， 当然也可以全部通过硬件来实 施， 但很多情况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方 案对背景技术做出贡献的全部或者部分可以以软件产品的形式体现出来，该计 算机软件产品可以存储在存储介质中， 如 ROM/RAM、 磁碟、 光盘等， 包括若 干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络设备 以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局 限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易 想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应该以权利要求书的保护范围为准。

Claims

权 利 要 求
1、 一种产生相位偏振调制信号的装置， 其特征在于， 包括，
激光器、 时分解复用器件、相位预编码模块、相位调制模块、 偏振预编码 模块和偏振调制模块， 其中，
所述激光器， 用于输出光信号；
所述时分解复用器件，用于将待传输的业务数据分解为第一子业务数据和 第二子业务数据；
所述相位预编码模块， 用于对所述的第一子业务数据进行相位预编码处 理， 得到相位预编码后的第一子业务数据；
所述相位调制模块，用于将所述相位预编码后的第一子业务数据相位调制 在所述光信号上， 得到相位调制后的第一子业务数据光信号；
所述偏振预编码模块， 用于对所述的第二子业务数据进行偏振预编码处 理， 得到偏振预编码后的第二子业务数据；
所述偏振调制模块，用于对所述偏振预编码后的第二子业务数据和相位调 制后的第一子业务数据光信号进行偏振调制， 得到相位偏振调制信号。
2、 如权利要求 1所述的装置， 其特征在于，
所述相位预编码模块具体为 D8PSK预编码模块， 用于对所述的第一子业 务数据进行相位预编码处理，得到相位预编码后的第一子业务数据； 所述相位 预编码后的第一子业务数据分为三路相位预编码后的业务数据；
所述相位调制模块具体包括， QPSK调制单元和相位调制单元；所述 QPSK 调制单元，用于将所述三路相位预编码后的业务数据中的其中两路进行正交相 位调制， 得到 QPSK调制后的光信号； 所述相位调制单元， 用于将所述三路相 位预编码后的业务数据中的另外一路和所述 QPSK调制后的光信号进行二相 位调制， 输出相位调制后的第一子业务数据光信号。
3、 如权利要求 1所述的装置， 其特征在于，
所述的相位预编码模块具体为 DQPSK预编码模块， 用于对所述的第一子 业务数据进行相位预编码处理，得到相位预编码后的第一子业务数据； 所述相 位预编码后的第一子业务数据分为两路相位预编码后的业务数据；
所述相位调制模块具体为， QPSK调制单元， 用于将所述两路相位预编码 后的业务数据进行正交相位调制， 输出相位调制后的第一子业务数据光信号。
4、 一种接收相位偏振调制信号的装置， 其特征在于，
包括， 分光器、 起偏器、 相位接收解调单元、 偏振分束器、 平衡接收机、 功分器、 异或器、 延时器和数据接口处理单元， 其中，
所述分光器， 用于接收相位偏振调制信号， 并将所述相位偏振调制信号分 为第一子相位偏振调制信号和第二子相位偏振调制信号；
所述起偏器， 用于将所述第一子相位偏振调制信号起偏处理，得到起偏后 的第一子相位偏振调制信号；
所述相位接收解调单元，用于将起偏后的第一子相位偏振调制信号进行解 调接收， 输出解调后的第一子相位偏振调制信号；
所述偏振分束器，用于对所述第二子相位偏振调制信号进行偏振选择分束 处理后， 得到 X偏振光信号和 Y偏振光信号；
所述平衡接收机， 用于对所述 X偏振光信号和 Y偏振光信号进行平衡接 收， 输出平衡接收后的电信号；
所述功分器， 用于将所述平衡接收后的电信号分为两路电信号， 所述两路 电信号中的一路通过所述延时器后，与所述两路电信号中的另一路一起通过所 述异或器， 输出解调后的第二子相位偏振调制信号；
所述数据接口处理单元，用于将所述解调后的第一子相位偏振调制信号和 所述解调后的第二子相位偏振调制信号进行时分复用处理， 得到业务数据。
5、 如权利要求 4所述的装置， 其特征在于， 所述相位接收解调单元具体 为 D8PSK接收解调单元， 或 DQPSK接收解调单元。
6、 一种产生相位偏振调制信号的方法， 其特征在于， 包括，
将待传输的业务数据分解为第一子业务数据和第二子业务数据； 对所述的第一子业务数据进行相位预编码处理，得到相位预编码后的第一 子业务数据；
对所述相位预编码后的第一子业务数据进行相位调制，得到相位调制后的 第一子业务数据光信号；
对所述的第二子业务数据进行偏振预编码处理，得到偏振预编码后的第二 子业务数据；
对所述偏振预编码后的第二子业务数据和相位调制后的第一子业务数据 光信号进行偏振调制， 得到相位偏振调制信号。
7、 如权利要求 6所述的方法， 其特征在于，
所述步骤对所述的第一子业务数据进行相位预编码处理，得到相位预编码 后的第一子业务数据具体为，
对所述的第一子业务数据进行相位预编码处理，得到三路相位预编码后的 业务数据；
所述步骤对所述相位预编码后的第一子业务数据进行相位调制，得到相位 调制后的第一子业务数据光信号具体为，
将所述三路相位预编码后的业务数据中的其中两路进行正交相位调制，得 到 QPSK调制后的光信号；将所述三路相位预编码后的业务数据中的另外一路 和所述 QPSK调制后的光信号进行二相位调制，输出相位调制后的第一子业务 数据光信号。
8、 如权利要求 6所述的方法， 其特征在于，
所述步骤对所述的第一子业务数据进行相位预编码处理，得到相位预编码 后的第一子业务数据具体为，
对所述的第一子业务数据进行相位预编码处理，得到两路相位预编码后的 业务数据；
所述步骤对所述相位预编码后的第一子业务数据进行相位调制，得到相位 调制后的第一子业务数据光信号具体为，
将所述两路相位预编码后的业务数据进行正交相位调制，输出相位调制后 的第一子业务数据光信号。
9、 一种接收相位偏振调制信号的方法， 其特征在于，
将相位偏振调制信号分为第一子相位偏振调制信号和第二子相位偏振调 制信号；
将所述第一子相位偏振调制信号起偏处理，得到起偏后的第一子相位偏振 调制信号；
将起偏后的第一子相位偏振调制信号进行解调接收，输出解调后的第一子 相位偏振调制信号；
对所述第二子相位偏振调制信号进行偏振选择分束处理后， 得到 X偏振 光信号和 Y偏振光信号；
对所述 X偏振光信号和 Y偏振光信号进行平衡接收， 输出平衡接收后的 电信号；
将所述平衡接收后的电信号分为两路电信号，所述两路电信号中的一路通 过延时器后， 与所述两路电信号中的另一路一起通过异或器，输出解调后的第 二子相位偏振调制信号；
将所述解调后的第一子相位偏振调制信号和所述解调后的第二子相位偏 振调制信号进行时分复用处理， 得到业务数据。
10、 一种相位偏振调制信号的传输系统， 其特征在于， 包括， 如权利要求 1所述的产生装置和权利要求 4所述的接收装置。
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