Capacity analysis of downlink MIMO-OFDMA frequency allocation with imperfect feedback information
| Autor: | Jouko Leinonen, Markku Juntti, Jyri Hamalainen |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
business.industry
Orthogonal frequency-division multiplexing Computer science Orthogonal frequency-division multiple access ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS MIMO Data_CODINGANDINFORMATIONTHEORY Spectral efficiency Frequency allocation Space–time block code Telecommunications link Electronic engineering Bit error rate business Computer Science::Information Theory Computer network |
| Zdroj: | 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications. |
| Popis: | Opportunistic resource allocation in orthogonal frequency division multiple access (OFDMA) and multiple-input multiple-output (MIMO) techniques are among the key methods to enhance the spectral efficiency in future wireless communication networks. In this paper, we express information theoretical capacity results for MIMO-OFDMA systems with optimal rate adaptation. So called best-M feedback is used for OFDMA resource allocation. Transmit antenna selection (AS) and space-time block coding (STBC) schemes are analyzed. We investigate the effect of the imperfect feedback to the system capacity. The results indicate the proposed sub-block best-M (SBB-M) feedback strategy with AS provides promising tradeoff between the system capacity, feedback overhead and robustness against feedback bit errors. |
| Databáze: | OpenAIRE |
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