科技通报
科技通報
과기통보
BULLETIN OF SCIENCE AND TECHNOLOGY
2015年
2期
70-72
,共3页
正交频分复用%光通信%动态补偿%峰值
正交頻分複用%光通信%動態補償%峰值
정교빈분복용%광통신%동태보상%봉치
orthogonal frequency division multiplexing%optical communication%dynamic compensation%peak
针对多载波光通信系统中多载波峰值平均功率比较大,导致放大器非线性失真严重的问题,提出一种基于动态反馈的多载波光通信非线性失真抑制算法。该算法采用部分传输序列对子信道的载波相位优化以降低峰值平均功率比发生概率,并对多载波信号噪声进行压扩限幅,接收端采用最大似然准则估算误码率最低部分传输序列相位加权系数,并将该相位加权系数反馈到发送端进行动态补偿,最大程度降低限幅噪声。性能分析和仿真结果表明,与概率类算法相比,该算法有效抑制峰值平均功效比非线性失真与限幅噪声,并降低了系统误码率。
針對多載波光通信繫統中多載波峰值平均功率比較大,導緻放大器非線性失真嚴重的問題,提齣一種基于動態反饋的多載波光通信非線性失真抑製算法。該算法採用部分傳輸序列對子信道的載波相位優化以降低峰值平均功率比髮生概率,併對多載波信號譟聲進行壓擴限幅,接收耑採用最大似然準則估算誤碼率最低部分傳輸序列相位加權繫數,併將該相位加權繫數反饋到髮送耑進行動態補償,最大程度降低限幅譟聲。性能分析和倣真結果錶明,與概率類算法相比,該算法有效抑製峰值平均功效比非線性失真與限幅譟聲,併降低瞭繫統誤碼率。
침대다재파광통신계통중다재파봉치평균공솔비교대,도치방대기비선성실진엄중적문제,제출일충기우동태반궤적다재파광통신비선성실진억제산법。해산법채용부분전수서렬대자신도적재파상위우화이강저봉치평균공솔비발생개솔,병대다재파신호조성진행압확한폭,접수단채용최대사연준칙고산오마솔최저부분전수서렬상위가권계수,병장해상위가권계수반궤도발송단진행동태보상,최대정도강저한폭조성。성능분석화방진결과표명,여개솔류산법상비,해산법유효억제봉치평균공효비비선성실진여한폭조성,병강저료계통오마솔。
According to the multi carrier wave communication system in multi carrier peak to average power is relatively large leads to serious problems of nonlinear distortion amplifier, this paper puts forward a dynamic feedback multi carrier optical communication based on nonlinear distortion suppression algorithm. The algorithm uses the carrier phase optimiza?tion of partial transmit sequence on channel to reduce the peak to average power ratio probability, and the multi carrier sig?nal companding limiting, the receiving end criterion of maximum likelihood estimation minimum bit error rate of the partial transmit sequence phase weighting coefficient, and feedback of the phase weighting coefficient to the sending end of dynam?ic compensation, the maximum degree reduce the clipping noise. Performance analysis and simulation results show that, compared with the probability method, the algorithm can effectively inhibit the peak to average power ratio of nonlinear dis?tortion and the clipping noise, and reduce the system bit error rate.