Patent ID: 7627051

Claim:
A wireless communication system comprising: a transmitter including: a space-domain precoder configured for processing in the space-domain, and a variable delay device configured for introducing adaptive time-domain variable time delay at each signal communication path for time diversity in the time-domain, where the variable delay device introduces delay in each path to modify the signal characteristics such that the signal along different paths are received with higher diversity order at the receiver; a receiver including a space-domain decoder for processing in the space-domain, wherein the receiver receiving signal transmissions from the transmitter, the receiver sends channel state information (CSI) back to the transmitter including eigenmode power distribution and precoder matrix, and the variable delay device adaptively adjusts the variable delays based on the CSI feedback from the receiver to provide uncorrelated signal transmissions at the receiver; such that the transmitter and the receiver combine time diversity and spatial multiplexing, to increase communication robustness and spectral efficiency, wherein the received signal transmissions are based on the output of the decoder, a channel matrix, precoder output, set of coded symbols and a noise vector, where the system is based on the model of Y=GHFX+GN, where Y is the received signal transmissions, G is the output of the decoder, H is the channel matrix, F is the precoder output, X is the set of coded symbols and N is the noise vector.