System and method for sampling rate adjustment of digital radio receiver

Abstract

Methods and systems for adjusting a sampling rate of a digital radio receiver are disclosed that comprise the steps of receiving from a decoder a first frame of data having a first number of samples; determining at the digital radio receiver a phase difference between a receiver clock and a transmitter clock; generating at the digital radio receiver a second frame of data having a second number of samples, wherein the second number of samples depends on the phase difference between the receiver clock and the transmitter clock such that the second number of samples is less than the first number of samples if the transmitter clock is ahead of the receiver clock, and the second number of samples is greater than the first number of samples if the receiver clock is ahead of the transmitter clock; outputting the second frame of data having the second number of samples; and requesting a next frame of data from the decoder at a time that is earlier than a processing time for the first number of samples if the transmitter clock is ahead of the receiver clock and at a time that is later than the processing time for the first number of samples if the receiver clock is ahead of the transmitter clock such that the next frame of data from the decoder and a next transmitter frame are synchronized, and wherein whether the second number of samples is greater than or less than the first number of samples is determined by whether the sampling rate is increased or decreased.