Steering diversity for an ofdm-based multi-antenna...

Details Steering diversity for an ofdm-based multi-antenna... Steering diversity for an ofdm-based multi-antenna...

H - Electricity

04

W

H04W 16/24 (2009.01) H04B 7/06 (2006.01) H04J 11/00 (2006.01)

Patent

CA 2689636

A transmitting entity uses different steering vectors for different subbands to achieve steering diversity. Each steering vector defines or forms a beam for an associated subband. Any steering vector may be used for steering diversity. The steering vectors may be defined such that the beams vary in a continuous instead of abrupt manner across the subbands. This may be achieved by applying continuously changing phase shifts across the subbands for each transmit antenna. As an example, the phase shifts may change in a linear manner across the subbands for each transmit antenna, and each antenna may be associated with a different phase slope. The application of linearly changing phase shifts to modulation symbols in the frequency domain may be achieved by either delaying or circularly shifting the corresponding time-domain samples.

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