Patent ID: 8630211

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 digitized input signal, the first receiver circuit being an intermediate frequency subsampling receiver having an intermediate frequency higher than baseband; a first transmitter circuit coupled to generate the amplified signal to transmit on the second antenna based on a digitized transmit signal, the first transmitter circuit being a direct conversion transmitter having an intermediate frequency at baseband; a second receiver circuit coupled to receive at least a portion of a signal to be transmitted prior to transmission over the second antenna and to generate a digitized transmit reference signal, the second receiver circuit being an intermediate frequency subsampling receiver; and a repeater baseband block configured to receive the digitized input signal from the first receiver circuit and to generate the digitized transmit signal for the first transmitter circuit, and further configured to receive the digitized transmit reference signal as a reference signal for channel estimation.