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High atmospheric laser communication channel RS interwoven complex code on FPGA

Author: WeiQiang
Tutor: TanLiYing
School: Harbin Institute of Technology
Course: Physical Electronics
Keywords: Laser Communications FPGA RS code Interweave
CLC: TN929.13
Type: Master's thesis
Year: 2010
Downloads: 164
Quote: 1
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Abstract


Satellite optical communication has important significance, can make the satellite laser link between the satellite , the satellite and the ground is established between high-quality, high-speed communications , which has got a lot of national attention , many domestic and foreign research institutions are its research or its inclusion in the study plan. Atmospheric laser communication satellite optical communication is an important part of the atmospheric laser communication susceptible to atmospheric factors, but also on the link in the communication objects will communicate in a short interruption. In addition, the communication distance may be longer , more serious light intensity attenuation , which requires a higher power transmission system of the laser output , enabling the system 's low error rate. Channel coding principle is the information code by adding a certain amount of redundancy operation symbols in the receiver by using the calibration correction polynomial , the transmission information has a certain degree of noise immunity benefits of doing so is to reduce the bit error rate and reduce transmission power. This paper introduces the satellite optical communications research significance and application background, focus on the analysis of the optical communications channel coding aspects of the research status quo. After the introduction of error control coding theory , and highlights the RS code decoding algorithm the relevant principles and interleaving techniques based upon matrix interleaving paper presents an improved way interleaving and simulation results with respect to certain traditional interleaving advantage. After analysis of the atmosphere on the various factors affecting the laser communication , and the use of measured data to establish the simulation model for channel coding simulation study provides a theoretical basis for further research . Respectively, after the FPGA hardware implementation of RS (15,9) encoder , decoder , improved matrix interleaver and deinterleaver , respectively, for the communications system transmitter and receiver design and implement a data buffer and port control module, were eventually the spatial light communication channel coding system called transmitter and receiver module of the interleaver and deinterleaver coding decoder hardware implementation of channel coding system . Paper finally carried out in the laboratory interleaved RS code to improve the quality of space optical communication capability verification experiment results show that the interleaved RS code for space optical communication quality has significantly improved capabilities.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications > Interplanetary optical communications
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