Patent ID: 8526355

Claim:
An apparatus, comprising: a channel estimator configured to estimate channel coefficients of communication channels of multiple-input-multiple-output communication; a precoder configured to apply the estimated channel coefficients to precode a transmit signal to cancel impact of the communication channels on the transmit signal; a first controller configured to provide the precoded transmit signal for multiple-input-multiple-output transmission in a first timeslot; a second controller configured to process a multiple-input-multiple-output receive signal received in a second timeslot following the first timeslot; and a cancellator configured to cancel the transmit signal from the receive signal, wherein the first controller is configured to provide the transmit signal for transmission via a first radio antenna, and a negation of the transmit signal for transmission via a second transmit antenna, and wherein the second controller is configured to process receive signals received via two radio antennas, the apparatus comprising a signal estimator configured to estimate a received signal, the signal estimator being, in estimation of the received signal, configured to: form a difference of receive signals received via the two radio antennas; multiply the difference by one divided by the square-root of two.