Patent ID: 8625658
Filing Date: 2014-01-07
Classification: H04B

Abstract:
1. A repeater configured to suppress external interference in the receive band of the repeater, comprising: a donor antenna that receives an input signal; a first filter that filters the input signal; a first amplifier that amplifies the filtered input signal; a down conversion component that converts the amplified and filtered input signal to an intermediate frequency signal; a digital signal processor that is configured to suppress the external interference from the intermediate frequency signal to generate a clear intermediate frequency signal; a reference input signal reflective of the external interference to the repeater, the reference input signal being separate from the input signal and coupled with the digital signal processor; the digital signal processor coupled with a control signal and configured to determine a cross correlation between the reference input signal and the control signal and further configured to adjust a filter to create a feedback signal used to suppress the external interference by adding the intermediate frequency signal with the feedback signal from the filter that has a similar amplitude and an inverted phase relative to the external interference; an up conversion component that converts the clear intermediate frequency signal to an output signal; a second amplifier that amplifies the output signal; a second filter that filters the amplified output signal; and a coverage antenna that radiates the filtered and amplified output signal, wherein the filtered and amplified output signal is at or about the frequency of the input signal.