衰落信道下基于线性预测的迭代解调及译码技术:Turbo DPSK  

Iterative Differential PSK Demodulation and Channel Decoding Based on Linear Prediction over Rayleigh Flat Fading Channels

作　　者：伍一[1] 周世东[1] 姚彦[1] 

机构地区：[1]清华大学电子工程系微波与数字通信国家重点实验室,北京100084

出　　处：《电子学报》2000年第z1期5-7,11,共4页Acta Electronica Sinica

摘　　要：本文针对移动通信中常见的衰落信道的特点 ,提出了一种基于信道增益线性估计的TurboDPSK解调、译码技术 .其特点是在进行信道增益的线性估计时无需知道信道的自相关函数 ,可简化接收机的复杂度 .同时在系统中引入Per SurvivorProcess(PSP)和迭代译码技术 ,充分利用每次迭代后的信息进一步提高系统的性能 .计算机仿真表明 ,采用这种基于线性信道估计的TurboDPSK系统有很好的抗衰落性能 .Based on the properties of Rayleigh flat-fading channel model in mobile radio communication,we research and propose a kind of new turbo DPSK based on linear prediction of channel gain.The receiver has a simple structure due to the fact that linear prediction here does not depend on the autocorrelation function of the fading process.Moreover,we combine linear prediction with Per-survivor processing to improve channel estimation.Simulation result show that new Turbo DPSK system provides good BER performance in fading channel.

关 键 词：衰落 线性估计 PSP TURBO DPSK 

分 类 号：TN-55[电子电信]