FREQUENCY MANAGEMENT USING SAMPLE RATE CONVERSION

摘要

In one embodiment, an apparatus includes a first receiver path with a first digitizer to digitize an incoming signal obtained from a radio frequency signal including at least a first desired channel into samples, the first digitizer to operate at a first sampling frequency, a first sample rate converter coupled to an output of the first digitizer to receive the samples at the first sampling frequency and to output the samples at a fixed sampling frequency, and a first digital processor to receive and process the samples at the fixed sampling frequency. The apparatus may further include a controller to receive a frequency change indication and to dynamically control the first sample rate converter to accommodate a change in the first sampling frequency from a first rate to a second rate.

主权项

1. An apparatus comprising:
a first analog-to-digital converter (ADC) to receive and sample an analog signal responsive to a first clock signal at a first clock frequency to output digitized samples, wherein the first clock frequency is dynamically controllable; a first asynchronous sample rate converter coupled to the first ADC to receive the digitized samples at the first clock frequency and to output the digitized samples at a second clock frequency, wherein the second clock frequency is a fixed frequency; a digital datapath coupled to the first asynchronous sample rate converter, and including a plurality of modules to process the digitized samples and to output processed digitized samples, the digital datapath to operate according to a second clock signal at the second clock frequency; and a second asynchronous sample rate converter coupled to the digital datapath to receive the processed digitized samples at the second clock frequency and to output the processed digitized samples at the first clock frequency.