Patent ID: 8837653
Filing Date: 2014-09-16
Classification: G01S,H04B

Abstract:
1. A signal receiver, comprising: an antenna interface for receiving signals from an antenna; a calibration signal generator, coupled to the antenna interface, to inject a calibration signal at the antenna interface, the calibration signal comprising a multi-tone signal having a plurality of orthogonal frequency components in a predefined range of frequencies; analog signal processing circuitry coupled to the antenna interface for processing the received signals to produce filtered signals; sampling circuitry to sample the filtered signals so as to produce digitized received signals; and a digital compensator to receive the digitized received signals and compensate for non-uniform group delay introduced by the analog signal processing circuitry to produce compensated digitized received signals, wherein the digital compensator is configured in accordance with phase values produced by a Fourier transform of signals received by the digital compensator in response to injection of the calibration signal at the antenna interface, the Fourier transform producing the phase values for a plurality of frequencies corresponding to the orthogonal frequency components of the calibration signal.