一种用于MMSE接收机的差分检测自适应算法  

Differential Detection Adaptive Algorithm for MMSE Receiver

作　　者：张宏滔[1] 陆佶人[1] 姜卫东[1] 

机构地区：[1]东南大学无线电工程系,南京210096

出　　处：《数据采集与处理》2005年第3期277-280,共4页Journal of Data Acquisition and Processing

摘　　要：在相干最小均方误差(MM SE)自适应接收机中增加了一个差分检测单元,提出一种将差分检测与自适应滤波进行联合优化的新算法。为了减轻MM SE滤波器跟踪时变信道的负担,在该算法中将滤波器权向量的调整过程与差分检测过程进行联合优化,而不是独立完成。仿真结果表明,与相干自适应算法相比,差分检测自适应算法能有效地增强接收机对抗载波频偏和相位噪声的能力。A differential detector unit is added to the coherent minimum mean-squared error （MMSE） adaptive receiver. Based on this receiver structure, a novel adaptive algorithm is proposed. To alleviate the burden of the tracking variant channel, the filter coefficient vector is jointly optimized with the differential detection by the algorithm. Compared with the coherent adaptive algorithms, simulation results demonstrate that the new algorithm improves the ability of resisting the carrier frequency offset and the phase variance.

关 键 词：自适应算法 差分检测 码分多址 

分 类 号：TN914.5[电子电信—通信与信息系统]