DocumentCode :
872369
Title :
MMSE Equalizer for MIMO-ISI Channel With Shorten Guard Period
Author :
Kwan, Man-Wai ; Kok, Chi-Wah
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol.
Volume :
55
Issue :
1
fYear :
2007
Firstpage :
389
Lastpage :
395
Abstract :
A finite-impulse-response minimum mean-square error equalizer (FIR-MMSEE) for block-based transmission over a multiple-input multiple-output (MIMO) intersymbol interference (ISI) channels is proposed in this correspondence. The proposed MMSE equalizer can avoid interblock interference (IBI) without requiring a guard period to be larger than or equal to the channel order. By reducing the number of redundant symbols in the transmitted signals, the spectral efficiency of the communication system with long channel dispersion can be greatly improved. We further investigated the parallel FIR-MMSEE equalization structure and proposed a group successive interference cancellation MMSE equalizer (GSIC-MMSEE). A group of elements in the output of the FIR-MMSEE will be used to successively cancel their own effect in the received signals after the signal detection in GSIC-MMSEE. Since the cancellation process eliminates some interference sources, the error performance of the subsequent equalization will be improved. Moreover, the interference cancellation is performed in a group-by-group basis. As a result, the computational complexity of the proposed equalizer can be controlled by adjusting the number of groups in the GSIC. Simulation results are presented to compare the performance of the proposed FIR-MMSEE and GSIC-MMSEE
Keywords :
FIR filters; MIMO communication; computational complexity; equalisers; filtering theory; interference suppression; intersymbol interference; least mean squares methods; radio networks; wireless channels; MIMO-ISI channels; block-based transmission; channel dispersion; computational complexity; finite-impulse-response MMSE equalizer; group successive interference cancellation; intersymbol interference avoidance; minimum mean-square error equalizer; multiple-input multiple-output; redundant symbol; Block codes; Computational complexity; Equalizers; Frequency-selective fading channels; Interference cancellation; Intersymbol interference; MIMO; Signal detection; Signal resolution; Wireless communication; Decision feedback equalizer; MMSE equalizer; filter bank; multiple antenna; multiple-input multiple-output (MIMO); precoder– equalizer; space–time block code (STBC); space–time modulated code (STMC); successive interference cancellation;
fLanguage :
English
Journal_Title :
Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1053-587X
Type :
jour
DOI :
10.1109/TSP.2006.882067
Filename :
4034179
Link To Document :
بازگشت