Transmitter diversity technique for wireless communications

Details Transmitter diversity technique for wireless communications Transmitter diversity technique for wireless communications

H - Electricity

04

B

H04B 7/02 (2006.01) H03M 13/39 (2006.01) H04B 1/16 (2006.01) H04B 7/005 (2006.01) H04B 7/06 (2006.01) H04L 1/02 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2509947

A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter utilizes space diversity and either time or frequency diversity. Space diversity is effected by redundantly transmitting over a plurality of antennas, time diversity is effected by redundantly transmitting at different times, end frequency diversity is effected by redundantly transmitting at different frequencies. Illustratively, using two transmit antennas and a single receive antenna, one of the disclosed embodiments provides the same diversity gain as the maximal-ratio receiver combining (MRRC) scheme with one transmit antenna and two receive antennas. The principles of this invention are applicable to arrangements with more than two antennas, and an illustrative embodiment is disclosed using the same apace block code with two transmit and two receive antennas.

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