Patent ID: 8542623
Filing Date: 2013-09-24
Classification: H04B

Abstract:
1. 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 generating a digitized input signal; a first transmitter circuit coupled to generate the amplified signal to transmit on the second antenna based on a digitized transmit signal; 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; and a repeater baseband block coupled to the first receiver circuit, the second receiver circuit, and the first transmitter circuit, the repeater baseband block operative to receive the digitized input signal from the first receiver circuit, to access a feedback signal estimate, and to cancel the feedback signal estimate from the digitized input signal to generate the digitized transmit signal for the first transmitter circuit, the repeater baseband block including a channel estimation block to estimate the feedback channel and to provide a feedback channel estimate, the channel estimation block using the digitized transmit reference signal as a reference signal for channel estimation.