Orthogonal switched beams for downlink diversity transmission |
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Authors: | Zhongding Lei Chin FPS Ying-Chang Liang |
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Affiliation: | Inst. for Infocomm Res., Singapore, Singapore; |
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Abstract: | A downlink transmission scheme in a switched-beam antenna system for providing diversity and beamforming simultaneously based on the space-time block coding technique is proposed. The scheme involves selecting multiple beams based on the uplink reception of the switched-beam antenna system, and determining multiple orthogonal beams from the selected beams. With the orthogonal transmit beams, the proposed switched-beam antenna system outperforms conventional switched-beam systems and approaches the optimal performance achievable by a much complex adaptive antenna system. |
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