Patent ID: 8611227

Claim:
A method for estimating a feedback channel for a wireless repeater in a wireless communication system, the wireless repeater having a first antenna and a second antenna to receive a receive signal and transmit an amplified signal, the receive signal being a sum of a remote signal to be repeated and a feedback signal resulting from the feedback channel between the first and second antenna of the wireless repeater, the method comprising: using blocks of N samples of the amplified signal as a pilot signal; using blocks of N samples of the receive signal; estimating the feedback channel between the first antenna and the second antenna using the pilot signal and the receive signal; detecting changes in a power of the remote signal; when a large power swing in the remote signal is detected, discarding samples or blocks of N samples of the pilot signal and the corresponding receive signal; and generating a final channel estimate using one or more undiscarded blocks of the pilot and receive signals.