ISI mitigation and channel tracking in MIMO-OFDM systems

Wen-Rong Wu*, Chao Yuan Hsu, Hsien Tse Hsu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

When the channel response is longer than the guard interval in OFDM systems, inter-symbol interference (ISI) and intercarrier interference (ICI) will occur and this may seriously affect the receiver performance. In this paper, we consider the ISI and ICI mitigation in MIMO-OFDM systems. We propose to use a decision feedback technique for ISI cancelation and a cyclic reconstruction technique for ICI removal. Combining with the V-BLAST method, we obtain an iterative signal detection algorithm for MIMO-OFDM systems. Since the channel may be time-variant, we then further propose an adaptive time-domain channel tracking method. The algorithm can be implemented with IFFT so that its computational complexity is low. Simulations demonstrate that the proposed method can effectively enhance the overall MIMO-OFDM system performance.

Original languageEnglish
Title of host publicationProceedings of 2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005
Pages101-104
Number of pages4
DOIs
StatePublished - 1 Dec 2005
Event2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005 - Hong Kong, China
Duration: 13 Dec 200516 Dec 2005

Publication series

NameProceedings of 2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005
Volume2005

Conference

Conference2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005
CountryChina
CityHong Kong
Period13/12/0516/12/05

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    Wu, W-R., Hsu, C. Y., & Hsu, H. T. (2005). ISI mitigation and channel tracking in MIMO-OFDM systems. In Proceedings of 2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005 (pp. 101-104). [1595356] (Proceedings of 2005 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2005; Vol. 2005). https://doi.org/10.1109/ISPACS.2005.1595356