Patent ID: 7672391

Claim:
A receiver for receiving M multi-carrier signals transmitted from M transmit antennas, M>1, the receiver comprising: at least (M+1) receive paths, each receive path adapted to receive the M multi-carrier signals and separate the received signals into separate subcarrier signals; and a processor adapted to process the separate subcarrier signals to generate a recovered version of each of the M transmitted multi-carrier signals, wherein: each receive path comprises: a receive antenna adapted to receive the multi-carrier signals; an analog-to-digital converter adapted to digitize the received multi-carrier signals; and a transform block adapted to convert the digitized multi-carrier signals in a time domain into the separate subcarrier signals in a frequency domain; and the transform block comprises: a first transformer adapted to convert an initial set of the digitized multi-carrier signals into an initial set of separate subcarrier signals in the frequency domain; and a second transformer adapted to convert subsequent sets of the digitized multi-carrier signals into subsequent sets of separate subcarrier signals in the frequency domain based on the initial set of separate subcarrier signals.