A novel link adaptive transmission scheme in higher-order MIMO systems

This paper proposes a novel cascaded precoding scheme at the base station to adapt to both long-term and short-term channel variations in higher-order MIMO systems which are supported in 3GPP LTE-Advanced. The proposed precoding scheme includes a long-term precoding followed by a short-term precodin...

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Bibliographic Details
Published in2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications pp. 1621 - 1625
Main Authors Minxia Hu, Shi Jin, Xiqi Gao
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2011
Subjects
Channel estimation
Correlation
Feeds
MIMO
Phase shift keying
Signal to noise ratio
Transmitting antennas
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Summary:This paper proposes a novel cascaded precoding scheme at the base station to adapt to both long-term and short-term channel variations in higher-order MIMO systems which are supported in 3GPP LTE-Advanced. The proposed precoding scheme includes a long-term precoding followed by a short-term precoding, where the former bases on the channel statistical eigenmodes, adapting to the long-term channel variations and the latter bases on the LTE Rel. 8 codebook, adapting to the short-term channel variations. Simulation results show that the proposed scheme can achieve a high spectral efficiency while guaranteeing a given codeword error ratio target. And when compared with the precoding scheme using the codebook for LTE-Advanced which is finally fixed recently in one of the 3GPP's proposals, the proposed scheme has a comparable performance but a reduced complexity due to the codebook size and long-term feedback interval.
ISBN:9781457713460
1457713462
ISSN:2166-9570
DOI:10.1109/PIMRC.2011.6139778