过饱和多址系统中QPSK非相干多用户信码/相位最佳联合检测  

NON-COHERENT MULTIUSER WEIGHT/PHASE OPTIMAL JOINT DETECTION IN OVER-SATURATED MULTIPLE ACCESS COMMUNICATION

作　　者：毕见鑫[1] 王映民[1] 易克初[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,西安710071

出　　处：《电子与信息学报》2002年第1期68-70,共3页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(No.69872027)

摘　　要：该文首先通过理论推导给出了过饱和多址系统中多用户信码/相位联合估计子。然后提出了低复杂度非相干多用户信码/相位最佳联合检测算法。此算法适用于具有二维星座的线性调制方式。通过计算机仿真实验,分析了此非相干最佳接收机的误码性能及相位提取误差等有关问题,并与相干最佳接收机作了比较,得出了一些有益的结论。This paper explores the problem of non-coherent multiuser weight/phase optimal joint detection for QPSK signal in over-saturated multiple access communication. Firstly, non-coherent multiuser weight/phase estimator is given via theoretical analysis. Then, the low complexity non-coherent multiuser weight/phase optimal joint detection algorithm is proposed, which is fit with practical working-condition and is applicable to linear modulation methods with two-dimensional constellation. Finally, the performance of the non-coherent optimal receiver and the phase estimate error is analyzed via computer simulation aud some useful conclusions are drawn.

关 键 词：QPSK 过饱和多址通信 非相干检测 相位误差 多用户信码 

分 类 号：TN914.5[电子电信—通信与信息系统]