西安电子科技大学学报（自然科学版）
西安電子科技大學學報（自然科學版）
서안전자과기대학학보（자연과학판）
Journal of Xidian University (Natural Science)
2015年
5期
139-146
,共8页
空间分集%Turbo均衡%符号间干扰%外信息传递图
空間分集%Turbo均衡%符號間榦擾%外信息傳遞圖
공간분집%Turbo균형%부호간간우%외신식전체도
spatial diversity%Turbo equalization%intersymbol interference%extrinsic information transfer (EXIT)chart
针对符号间干扰信道的多天线分集接收问题，提出了一种迭代均衡合成算法。该算法不需要借助复杂的信噪比估计方法，而是直接利用分集支路迭代均衡的相关参数计算合成权值，以进行均衡符号的合成；并将译码输出的外信息反馈至分集支路，在译码器和支路均衡器之间迭代交换软信息。外信息传递图分析和计算机仿真结果均表明，所提算法充分利用了多径时域信息和多天线空域信息，能够有效提升接收系统抗严重符号间干扰的能力。
針對符號間榦擾信道的多天線分集接收問題，提齣瞭一種迭代均衡閤成算法。該算法不需要藉助複雜的信譟比估計方法，而是直接利用分集支路迭代均衡的相關參數計算閤成權值，以進行均衡符號的閤成；併將譯碼輸齣的外信息反饋至分集支路，在譯碼器和支路均衡器之間迭代交換軟信息。外信息傳遞圖分析和計算機倣真結果均錶明，所提算法充分利用瞭多徑時域信息和多天線空域信息，能夠有效提升接收繫統抗嚴重符號間榦擾的能力。
침대부호간간우신도적다천선분집접수문제，제출료일충질대균형합성산법。해산법불수요차조복잡적신조비고계방법，이시직접이용분집지로질대균형적상관삼수계산합성권치，이진행균형부호적합성；병장역마수출적외신식반궤지분집지로，재역마기화지로균형기지간질대교환연신식。외신식전체도분석화계산궤방진결과균표명，소제산법충분이용료다경시역신식화다천선공역신식，능구유효제승접수계통항엄중부호간간우적능력。
To realize joint optimization of spatial diversity and equalization combining in the intersymbol interference ( ISI ) channel , an iterative equalization combining algorithm is proposed . The proposed algorithm uses the coefficients of Turbo equalization to calculate the combination weights without estimating the signal to noise ratio in each diversity branch . The equalized symbols from different diversity branches are combined , and the extrinsic information output from the decoder is fed back to the equalizers , so as to exchange soft information between the equalizers and the decoder . The performance of the proposed algorithm is analyzed using the extrinsic information transfer ( EXIT ) chart and verified by simulations . Results show that our approach fully exploits time domain information from the multipath channel and spatial domain information from multi receiving antennas , which efficiently improve the performance of the receiver in the severe ISI channel .
