摘要
并行干扰抵消检测被认为是一种很有前途的多用户检测器,该文将其应用于直接序列扩频系统中的数字窄带干扰抑制问题。分析了这种并行干扰抵消检测器在抑制数字窄带干扰时的性能,并将其与部分并行干扰抵消检测的性能相比较。理论分析和仿真结果证明,将接收信号经过一次并行干扰抵消后的输出信号直接应用于数据判决,会得到较好的干扰抑制效果,其误码性能可以达到解相关检测的水平。同时,并行干扰抵消检测还具有抗远近效应的能力,其性能与干扰的能量无关。
Parallel interference cancellation (PIC) detector is regarded as a promising multi-user detector. In this paper, we apply it to suppression of digital narrowband interference in DSSS system. The performance of PIC detector is analyzed, and is compared with the performance of partial parallel interference cancellation (PPIC) detector. It is proved that by passing the received signal through one-stage PIC detector, and employing the output in data decision directly, we can achieve excellent performance, which is close to that of decorrelation detector. What's more, PIC detector is near-far resistant, whose performance is independent of power of interference.
出处
《计算机仿真》
CSCD
2005年第3期95-98,共4页
Computer Simulation
关键词
窄带干扰
多用户检测
并行干扰抵消检测
NBI
Multi-user detector
Parallel interference cancellation (PIC)
