DFIS用于抑制CDMA中的多路單頻干擾
USING DFIS FOR MULTI-TONE INTERFERENCE SUPPRESSION IN CDMA
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摘要: 本文提出了結(jié)構(gòu)簡(jiǎn)單的非線(xiàn)性判決反饋干擾抑制器(DFIS)，并用于抑制CDMA中多路單頻干擾。DFIS的估值濾波器(EF)采用單邊預(yù)測(cè)濾波器和雙邊抽頭濾波器。EF的輸入和權(quán)值修正中均采用判決值。推導(dǎo)了兩種EF的DFIS的信噪比改善(SNRI)表達(dá)式。分析比較了兩種EF的理論分析和模擬結(jié)果。
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關(guān)鍵詞:
- 判決反饋干擾抑制器; 多路單頻干擾; CDMA; LMS算法
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. -
Poor H V,Rusch L A.Narrowband interference suppression in spread spectrum CDMA.IEEE Personal Comm.Third Quarter,1994,14-17.[2]Wen-Rong Wu,Fu-Fang Yu.New nonlinear algorithms for estimating and suppressing narrow-band interference in DS spread spectrum.IEEE Trans.on Comm.1996,44(4):508-515.[3]Li Zhengmao,et al.Rejection of multiple narrowband interference in DS spread-spectrum sys-tems.IEEE COM86,1986,5.4.1-5.4.5. -
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