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Method for electrical equalization and electrical depolarization, receiving end device and communication system

一种电均衡、接收端的技术，应用在通信领域，达到复杂度降低的效果

Inactive Publication Date: 2010-10-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide a method, device and communication system for electrical balance and electrolytic bias, so that the problems of electrical balance and electrolytic bias in polarization multiplexing OFDM systems can be solved relatively simply.

Method used

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  • Method for electrical equalization and electrical depolarization, receiving end device and communication system
  • Method for electrical equalization and electrical depolarization, receiving end device and communication system
  • Method for electrical equalization and electrical depolarization, receiving end device and communication system

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Embodiment 1

[0040] A method of electrical equalization and electrolytic bias, on the one hand, converts the received time-domain signal into a frequency-domain signal, on the other hand, detects the synchronization sequence in the received time-domain signal, and obtains the control corresponding to the detection situation signal, and then calculate the parameters required for electrical equalization and electrolytic bias according to the control signal, and finally use the parameters to perform electrical equalization and electrolytic bias on the converted frequency domain signal, that is, perform electrical equalization and electrolytic bias on the received signal in the frequency domain. Electrolytic bias. Among them, the received signal here generally refers to the time domain signal and the frequency domain signal. When the received signal is in the time domain, it is called the time domain signal. When the received signal is in the frequency domain, it is called the frequency domain ...

Embodiment 2

[0052] According to the method described in Embodiment 1, an example will be given below for further detailed description.

[0053] In order to better describe the embodiment of the present invention, figure 2 A schematic diagram of signal processing by a receiver device according to an embodiment of the present invention is given (it should be noted that, for ease of understanding, figure 2 The processing of other parts in the prior art is also given in ). The process is as follows:

[0054] The received optical signal is divided into two optical signals by a polarization beam splitter (PBS, Polarization Beam Splitter), and the two optical signals are converted into analog electrical signals through coherent demodulation and photoelectric conversion respectively. The two analog electrical signals pass through the analog / digital converter (ADC, Analog-to-Digital Converter, in figure 2 ADC) is sampled and quantized into a digital baseband signal, and the two digital signa...

Embodiment 3

[0099] In this embodiment, the equalizer, the depolarizer, and the detection of the synchronization sequence in the time domain signal are the same as in the second embodiment, but the parameters required for electrical equalization and electrolytic polarization are calculated in other ways. as follows:

[0100] (1) When the control signal indicates that the received time-domain signal is a synchronous sequence, that is, when the synchronous sequence is detected, an adaptive algorithm based on training is used to calculate the parameters required for electrical equalization and electrolytic bias.

[0101] The iterative formula of the training-based adaptive algorithm is the same as that of the decision-feedback adaptive algorithm, but the error calculation method is different. The synchronization sequence is known to both the sending end and the receiving end, assuming that the signal sent in the X polarization state is The signal sent by the Y polarization state is After ...

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Abstract

The embodiment of the invention discloses a method for electrical equalization and electrical depolarization, a receiving end device and a communication system. The embodiment of the invention solves the problems of electrical equalization and electrical depolarization in a polarization multiplexing OFDM system by detecting synchronous sequences in a received signal, calculating parameters required for the electrical equalization and the electrical depolarization and implementing the electrical equalization and the electrical depolarization on the received signal in a frequency domain by using the parameters; and compared with the implementation of the electrical equalization and the electrical depolarization in a time domain, the complexity is greatly reduced by implementing the electrical equalization and the electrical depolarization in the frequency domain.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an electrical equalization and electrolytic equalization method, a receiving end device and a communication system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) is a high-speed transmission technology. The basic principle of this technology is to convert high-speed serial data into multiple channels of relatively low-speed parallel data and modulate different carriers. This parallel transmission system greatly expands the pulse width of symbols and improves the performance of anti-multipath fading. Polarization Multiplexing (PDM, PDM Polarization Division Multiplexing) technology can reduce the system baud rate by half, relax the bandwidth requirements for high-speed electronic devices, and allow smooth upgrade from the existing 10Gb / s commercial optical transmission network. It is a very Potent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L27/26H04B10/07H04B10/2507
CPCH04L25/03159H04L27/2626
Inventor 陈子欢刘磊解长松
Owner HUAWEI TECH CO LTD
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