Patent ID: 8553819

Claim:
A method for operating a transceiver to maintain channel reciprocity in an Orthogonal Frequency Division Multiplexing (OFDM) communication system, the method comprising: receiving a first receive-signal using a first antenna and a second receive-signal using a second antenna, wherein the first receive-signal and the second receive-signal correspond to a first OFDM signal; applying a cyclic delay to the first receive-signal to generate a cyclically delayed first receive-signal; combining the second receive-signal with the cyclically delayed first receive-signal to obtain data transmitted over sub-carriers of the first receive-signal and the second receive-signal; applying the cyclic delay to a first transmit-signal to generate a cyclically delayed first transmit-signal; and transmitting the cyclically delayed first transmit-signal from the first antenna and a second transmit-signal from the second antenna, wherein the first transmit-signal and the second transmit-signal correspond to a second OFDM signal.