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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Published in | 2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications pp. 1621 - 1625 |
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Main Authors | , , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
01.09.2011
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Subjects | |
Online Access | Get full text |
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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. |
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ISBN: | 9781457713460 1457713462 |
ISSN: | 2166-9570 |
DOI: | 10.1109/PIMRC.2011.6139778 |