Chip Equalization Using Subband Adaptive Decomposition in Downlink MIMO DS-UWB

Author

Hu, Chia-Chang ; Liao, Yung-Cheng

Author_Institution

Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan

fYear

2011

fDate

5-9 June 2011

Firstpage

1

Lastpage

6

Abstract

An adaptive subband chip-equalizer is investigated for downlink multiple-input multiple-output (MIMO) direct-sequence (DS) ultra-wideband (UWB) systems to cope with the inter-symbol interference (ISI) and the multiple-access interference (MAI) in multipath fading channels. The subband decomposition technique is employed to improve substantially the downlink reception of mobile-terminal receivers without compromising the overall computational complexity. A reduced-complexity chip-equalization scheme is proposed by making use of the architecture of the reduced-rank (RR) multistage matrix Wiener filter (MMWF) 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.

Keywords

MIMO communication; Wiener filters; channel estimation; communication complexity; fading channels; intersymbol interference; matrix algebra; mobile radio; multi-access systems; multipath channels; radio links; radio receivers; radio reception; spread spectrum communication; ultra wideband communication; ISI; MAI; MMWF architecture; adaptive subband chip-equalizer; direct sequence ultra wideband system; downlink MIMO DS-UWB; downlink reception; intersymbol interference; mobile terminal receiver; multipath fading channel; multiple access interference; multiple-input multiple-output system; reduced complexity chip equalization scheme; reduced rank multistage matrix Wiener filter architecture; subband adaptive decomposition; subband decomposition technique; Downlink; Equalizers; Filter banks; MIMO; Receiving antennas; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (ICC), 2011 IEEE International Conference on

Conference_Location

Kyoto

ISSN

1550-3607

Print_ISBN

978-1-61284-232-5

Electronic_ISBN

1550-3607

Type

conf

DOI

10.1109/icc.2011.5963035

Filename

5963035