系统工程与电子技术
繫統工程與電子技術
계통공정여전자기술
SYSTEMS ENGINEERING AND ELECTRONICS
2015年
7期
1658-1662
,共5页
李民政%欧阳缮%谢跃雷%肖海林
李民政%歐暘繕%謝躍雷%肖海林
리민정%구양선%사약뢰%초해림
差分网络编码%循环延时编码%放大转发
差分網絡編碼%循環延時編碼%放大轉髮
차분망락편마%순배연시편마%방대전발
differential network coding%cyclic delay codes (CDC)%amplify and forward (AF)
在多子载波、频率选择性衰落、双向中继转发信道中提出多中继协作的基于AF-CDC-OFDM的差分网络编码方法。通过多个协作中继的分布式循环延时编码及功率放大处理,两路终端发送的差分编码分组可获得完全的协作分集和频率分集增益。两路终端在检测对方的发送信号之前需要消除自干扰信号,为此,提出基于统计相关的自干扰分量估计方法。仿真结果表明,提出的差分网络编码能够获得完全的分集增益性能,对应的自干扰分量相关统计估计算法在慢衰落信道中与干扰分量完全消除的检测性能相比,仅有0.5 dB 的信噪比损耗。
在多子載波、頻率選擇性衰落、雙嚮中繼轉髮信道中提齣多中繼協作的基于AF-CDC-OFDM的差分網絡編碼方法。通過多箇協作中繼的分佈式循環延時編碼及功率放大處理,兩路終耑髮送的差分編碼分組可穫得完全的協作分集和頻率分集增益。兩路終耑在檢測對方的髮送信號之前需要消除自榦擾信號,為此,提齣基于統計相關的自榦擾分量估計方法。倣真結果錶明,提齣的差分網絡編碼能夠穫得完全的分集增益性能,對應的自榦擾分量相關統計估計算法在慢衰落信道中與榦擾分量完全消除的檢測性能相比,僅有0.5 dB 的信譟比損耗。
재다자재파、빈솔선택성쇠락、쌍향중계전발신도중제출다중계협작적기우AF-CDC-OFDM적차분망락편마방법。통과다개협작중계적분포식순배연시편마급공솔방대처리,량로종단발송적차분편마분조가획득완전적협작분집화빈솔분집증익。량로종단재검측대방적발송신호지전수요소제자간우신호,위차,제출기우통계상관적자간우분량고계방법。방진결과표명,제출적차분망락편마능구획득완전적분집증익성능,대응적자간우분량상관통계고계산법재만쇠락신도중여간우분량완전소제적검측성능상비,부유0.5 dB 적신조비손모。
Based on the amplify and forward-cylic delay codes-orthogonal frequency division multiplexing (AF-CDC-OFDM)technology,a differential network coding method with multi-relay cooperation is proposed over the multi-carrier and frequency selective two-way relay channel.The two-way terminals can obtain the maximum cooperation di-versity gains and frequency diversity gains through the distributed relay cyclic delay coding and power amplification pro-cessing.However,the two terminals need to eliminate the self-interference component among received signals before detecting the transmit symbol.Therefore,a self-interference elimination method is proposed with correlation statistical processing.The simulation results demonstrate that the proposed differential network encoding method can obtain the full diversity gain,and the proposed self-interference component eliminating method only has 0.5 dB SNR loss compared with the Genie-aided method over the slow fading channel.