SYSTEM AND METHOD FOR SYNCHRONOUS PROCESSING OF ANALOG AND DIGITAL PATHWAYS IN A DIGITAL RADIO RECEIVER

摘要

A method of processing a digital radio broadcast signal in a digital radio receiver includes: receiving baseband signal samples at a first sample rate; adjusting the sample rate of the baseband signals based on a difference between a receiver clock and a transmitter clock to produce adjusted baseband signal samples at a second sample rate; filtering the adjusted baseband signal samples to separate a digital component of the samples and an analog component of the samples, wherein the digital component and the analog component are synchronous; and separately demodulating the digital component and the analog component to produce a digital output signal and an analog output signal. A receiver that uses the method is also provided.

主权项

1. A method of processing a digital radio broadcast signal in a digital radio receiver comprising:
receiving baseband signal samples at a first sample rate; using an asynchronous sample rate converter to adjust the sample rate of the baseband signal samples based on a sample rate correction value derived from both a sample slip and a sample rate offset between a receiver and a transmitter to produce adjusted baseband signal samples at a second sample rate to drive both the sample slip and the sample rate offset to zero; filtering the adjusted baseband signal samples to separate a digital component of the samples and an analog component of the samples, wherein the digital component and the analog component are synchronous; and separately demodulating the digital component and the analog component to produce a digital output signal and an analog output signal.