Patent ID: 8553610

Claim:
A wireless repeater having a first antenna and a second antenna to receive an input signal and transmit an amplified signal, the input signal being a sum of a remote signal to be repeated and a feedback signal resulting from a feedback channel between the first antenna and the second antenna, the repeater comprising: a first receiver circuit coupled to the first antenna to receive the input signal and to generate a digital input signals at baseband frequency; a first transmitter circuit coupled to generate the amplified signal to transmit on the second antenna, the amplified signal being generated from a compressed digital transmit signal at baseband frequency; and a repeater digital baseband block configured to receive the digital input signal from the first receiver circuit and to generate the compressed digital transmit signal for the first transmitter circuit, the repeater baseband block operative to access a feedback signal estimate, to cancel the feedback signal estimate from the digital input signal to generate an echo cancelled signal, to delay the echo cancelled signal to generate a delayed signal, and to amplify and process the delayed signal to generate a first digital transmit signal, the repeater digital baseband block further configured to apply non-linear baseband compression of the first digital transmit signal to generate the compressed digital transmit signal, wherein the repeater baseband block is configured to access a feedback signal estimate using the compressed digital transmit signal as a reference signal.