PIC检测器解析表达式的偏差修正

由于传统PIC(Parallel Interference Canceller,并行干扰消除)检测器性能分析公式存在偏差,导致与仿真结果有一定的差异,不能准确反映系统性能。在对传统PIC检测器性能表达式和推导过程存在的偏差进行分析的基础上,通过公式推导,得到更为精确的PIC检测器任一级的误码率性能解析表达式。通过数值计算,偏差修正后的解析表达式对误码率估计的准确度比修正前提高了1个数量级,与仿真结果更为接近,并且干扰消除的级数越多效果越好。研究结果表明,修正后的PIC解析表达式是有效的。

Bias Correction in Analytical Expressions of PIC Detectors

The detector performance expressions of conventional PIC have bias that induces errors with simulation results, so they can not accurately reflect the system performance.Based on the analysis of conventional PIC performance expressions and their bias during deduction process, this paper gives a more accurate analytical BER (Bit Error Rate) expression of any PIC detector stage through equation deduction.Numerical computation results show that the new expression improved BER accuracy by one order of magnitude,which is close to the simulation results, and the performance can be enhanced by the stage number.The results indicate that the new PIC expression is effective.