无线电通信技术
無線電通信技術
무선전통신기술
RADIO COMMUNICATIONS TECHNOLOGY
2012年
3期
26-28,50
,共4页
大气激光通信%LDPC码%比特交织编码调制
大氣激光通信%LDPC碼%比特交織編碼調製
대기격광통신%LDPC마%비특교직편마조제
atmosphere laser communication%LDPC codes%BICM
针对大气激光通信系统的信道特性不稳定问题,为了加强纠错能力和码间抗干扰能力,提出将LDPC码和BICM相结合的编码调制技术应用于大气激光通信。针对大气信道特征建立了不同湍流条件下的信道模型,选取了合适的映射方式,并且在强湍流和弱湍流大气信道下,分别对不同的编码和调制方案进行了仿真分析。仿真结果表明,选取Gray映射的LDPC-BICM技术能够有效地改进系统性能。
針對大氣激光通信繫統的信道特性不穩定問題,為瞭加彊糾錯能力和碼間抗榦擾能力,提齣將LDPC碼和BICM相結閤的編碼調製技術應用于大氣激光通信。針對大氣信道特徵建立瞭不同湍流條件下的信道模型,選取瞭閤適的映射方式,併且在彊湍流和弱湍流大氣信道下,分彆對不同的編碼和調製方案進行瞭倣真分析。倣真結果錶明,選取Gray映射的LDPC-BICM技術能夠有效地改進繫統性能。
침대대기격광통신계통적신도특성불은정문제,위료가강규착능력화마간항간우능력,제출장LDPC마화BICM상결합적편마조제기술응용우대기격광통신。침대대기신도특정건립료불동단류조건하적신도모형,선취료합괄적영사방식,병차재강단류화약단류대기신도하,분별대불동적편마화조제방안진행료방진분석。방진결과표명,선취Gray영사적LDPC-BICM기술능구유효지개진계통성능。
In allusion to instability of atmosphere channel in optical communication system, a technique which integrates LDPC coding and bit-Interleaved Coded Modulation is put forward in order to improve the bandwidth efficiency,error correction ability and anti-jamming capability between codes. Aimed at characters of atmosphere channel,an appropriate label mapping is chosen, and the different methods of coding and modulation was analyzed and simulated toward strong turbulence and weak turbulence. The results of simulation proved that the performance of system can be improved effectively by adopting the technology of LDPC-BICM.
