Efficient MIMO DS-UWB Downlink Chip-Level MMSE Equalization Using Subband Adaptive Interference Mitigation Techniques

被引：1
|
作者：
Hu, Chia-Chang [1 ]
Liao, Yung-Cheng [1 ]
机构：
[1] Natl Chung Cheng Univ, Dept Commun Engn, Chiayi 62102, Taiwan
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2012年 / 61卷 / 08期
关键词：
Direct sequence; matrix conjugate gradient (MCG); multiple-input multiple-output (MIMO); multistage matrix Wiener filter (MMWF); reduced rank (RR); subband chip equalizer; ultrawideband (UWB); MULTIUSER DETECTION; PERFORMANCE; SYSTEMS;
D O I：
10.1109/TVT.2012.2205718
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An adaptive subband chip-level equalizer is investigated for downlink multiple-input-multiple-output (MIMO) direct-sequence (DS) ultrawideband (UWB) systems to cope with intersymbol interference (ISI) and multiple-access interference (MAI) in multipath fading channels. The subband decomposition technique with multiple analysis and synthesis filter banks (FBs) is employed to substantially improve the downlink reception of mobile-terminal (MT) receivers. This chip equalizer utilizes subband adaptive interference suppression techniques based on the minimum mean square error (MMSE) criterion. A reduced-complexity chip-level MMSE equalization scheme is proposed by making full use of the reduced-rank (RR) multistage matrix Wiener filter (MMWF) and the matrix conjugate gradient (MCG) architectures in subbands. Simulations are conducted to provide a comparative evaluation of the proposed subband chip equalizer with other existing full-band and subband chip equalizers.
引用
收藏
页码：3783 / 3790
页数：9
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