Patent ID: 8380122

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: estimating the feedback channel between the first antenna and the second antenna using frequency domain channel estimation and using a signal indicative of the amplified signal as a pilot signal; grouping samples of the pilot signal into blocks of N samples, N being the size of the fast Fourier transform (FFT) operation performed for the frequency domain channel estimation; blanking K samples of the pilot signal in each block of N samples, K being much less than N; and generating a feedback channel estimate using blocks of N samples of the pilot signal, each block of N samples including K blanked samples, and blocks of N samples of the receive signal.