Patent ID: 7020072
Filing Date: 2006-03-28
Classification: H04B,H04L

Abstract:
1. Apparatus for use in a wireless communication system to realize transmit diversity including first and second frequency domain signals to be transmitted comprising: a complex conjugate generator for generating a third frequency domain signal representative of a complex conjugate of said first frequency domain signal; a reverse sign (−) complex conjugate generator for generating a fourth frequency domain signal representative of a reverse sign (−) complex conjugate of said second frequency domain signal; a time domain signal generator for generating first through fourth time domain signals representative of said first through fourth frequency domain signals, respectively; pairing apparatus for pairing selected components of said first through fourth time domain signals in prescribed time intervals for transmission, whereby transmit diversity is provided for frequency-fading channels in the wireless communication system; and a first antenna and at least a second antenna for transmitting said time domain signals, wherein said pairing apparatus includes at least a first controllable selector for controllably selecting signal components of said first time domain signal for transmission on said first antenna during first time intervals and for controllably selecting signal components of said fourth time domain signal for transmission on said first antenna during second time intervals, and a second controllable selector for controllably selecting signal components of said second time domain signal for transmission on said second antenna during first time intervals and for controllably selecting signal components of said third time domain signal for transmission on said second antenna during second time intervals.