一种比较决策多用户检测器的研究

以多速率码分多址(CDMA)传输为出发点，以满足不同用户信号的信干比(SIR)检测要求为目标，给出了在具有决策反馈的并行干扰抵消(PIC)检测框架下，通过实施基于概率数据关联(PDA)预估计软判决和并行干扰抵消硬判决的两种决策比较，进而选择最佳判决的方法，有效地抑制了由于信号估计不准确而造成的错误干扰抵消及相应的判决错误。文中给出了仿真结果，并分别就单一的软、硬判决及比较决策的检测性能进行了分析和比较。

The study of multi-user detector based on comparison decision

Multi-user detecton (MUD) based on multirate transmission in CDMA system is discussed in this paper. With the requirement of signal-to-interference ratio (SIR) detection at base station and under the framework of parallel interference cancellation (PIC), a comparison decision algorithm based on pre-decision of probabilistic data association (PDA) and hard decision of PIC is proposed. Which effectively eliminate the incorrect interference cancellation and decision error caused by imprecise signal estimation. The simulation based on soft decision, hard decision and comparison decision scheme is implemented, respectively, and performance analysis and comparison is presented.