DFIS用于抑制CDMA中的多路单频干扰
USING DFIS FOR MULTI-TONE INTERFERENCE SUPPRESSION IN CDMA
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摘要: 本文提出了结构简单的非线性判决反馈干扰抑制器(DFIS)，并用于抑制CDMA中多路单频干扰。DFIS的估值滤波器(EF)采用单边预测滤波器和双边抽头滤波器。EF的输入和权值修正中均采用判决值。推导了两种EF的DFIS的信噪比改善(SNRI)表达式。分析比较了两种EF的理论分析和模拟结果。Abstract: This paper proposes a nonlinear descision feedback interference suppressor (DFIS)used both in the estimation of filter reference input and the weight update to suppress multi-tone interference in CDMA.Structure of DFIS is simpler.Two kinds of estimation filter;I.e.,single-side prediction filter and two-side tapped filter are used.Expressions of the SNR improvement are derived.The results of simulation with comparison to the theoretical analysis for two estimation filters are presented on the rejection performance.
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