Patent ID: 6683919
Filing Date: 2004-01-27
Classification: H04B,H04L,H04W

Abstract:
A wireless communication system receiver, including:a first stage, coupled to receive a transmitted signal and configured to produce an output signal in response to the transmitted signal; and a second stage coupled to receive the output signal and configured to perform a sequence of processing operations on the output signal, at least one of the processing operations performed on a different frequency band of the output signal than another of the processing operations, wherein the first stage includes: bandwidth control circuitry operable in a first mode during performance of the at least one of the processing operations, and in a second mode during performance of said another of the processing operations, wherein the bandwidth control circuitry allows the first stage to produce the output signal with a first bandwidth in the second mode, and the bandwidth control circuitry causes the first stage to produce the output signal with a second bandwidth narrower than the first bandwidth in the first mode, wherein the first stage also includes an analog filter, a digital filter, and an analog-to-digital converter coupled between the analog filter and the digital filter, wherein the analog-to-digital converter produces a digitized signal indicative of data, and wherein the bandwidth control circuitry is a data rotation circuit coupled between the analog-to-digital converter and the digital filter, the data rotation circuit being configured to rotate the data during the first mode.