Patent ID: 7738356

Claim:
A multiple stream cyclic-shifted delay transmitter comprises: a baseband processing module operable to convert outbound data into a plurality of transmit baseband signal streams, the baseband processing module including a cyclic time delay unit operable to cyclic-shift delay at least one of the plurality of transmit baseband signal streams by a static delay amount to produce at least one cyclic-shift delayed transmit baseband signal stream; and a plurality of radio frequency (RF) transmit sections coupled to the baseband processing module and operable to convert the plurality of transmit baseband signal streams and the at least one cyclic-shift delayed transmit baseband signal into a plurality of RF signals; wherein the baseband processing module further includes a first switching module operable to selectively couple the plurality of transmit baseband signal streams to the cyclic time delay unit over a plurality of time intervals such that for a given time interval of the plurality of time intervals, the at least one cyclic-shift delayed transmit baseband signal stream is produced; and wherein the baseband processing module further includes a second switching module coupled between the cyclic time delay unit and the plurality of RF transmit sections and operable to circular order coupling of the cyclic time delay unit and the plurality of transmit baseband signal streams to the plurality of RF transmit sections such that: for each time interval of the circular order: the second switching module couples the cyclic time delay unit to a selected one of the plurality of RF transmit sections and couples the plurality of transmit baseband signal streams to remaining ones of the plurality of transmit RF sections; and from at least one time interval to another time interval of the circular ordering: the second switching module couples the cyclic time delay unit to different selected ones of the plurality of RF transmit sections and couples the plurality of transmit baseband signal streams to different remaining ones of the plurality of RF transmit sections such that channels over which a plurality of radio frequency (RF) signals are transmitted are randomized.