A Channel Estimation Scheme for MIMO-MC-CDMA Downlink in High Mobility Environments

Zhiying WANG
Chen HE

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B    No.3    pp.1282-1286
Publication Date: 2005/03/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.3.1282
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
MIMO,  MC-CDMA,  channel estimation,  

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Summary: 
The next generation mobile communication system is required to support wideband wireless data links when terminals are moving at very high speed. In such case, accurate channel estimation is more crucial in this case. This paper presents a downlink channel estimation scheme for Multi-Input and Multi-Output (MIMO) MC-CDMA system by introducing uncorrelated and continuous pilot symbol sequence for every transmit antenna in code domain. Compared with conventional pilot aided estimation methods which insert pilots symbols in time domain, frequency domain or both of them, the proposed method can obtain more accurate channel impulse response matrix estimation in fast fading environments with much lower computation complexity and less resources exhausted. At last, we analyzed the BER performances of the scheme under a typical fast fading environment-VB and AWGN.