Patent ID: 6608826
Filing Date: 2003-08-19
Classification: H04B,H04L

Abstract:
A terrestrial CDMA RF receiver for receiving a CDMA communication signal transmitted on a selected RF carrier frequency and removing said RF carrier frequency to provide a received information signal; the receiver including a system for correcting phase errors in said information signal which has been transmitted on said selected RF carrier frequency channel; the correction system comprising:a local oscillator for generating a mixing signal; a mixer for combining said mixing signal with said information signal to produce a correction signal; analyzer for analyzing the phase of said correction signal and generating an error signal based on the deviation of the analyzed phase from a predetermined phase; and a bandwidth controller for recursively adjusting the phase of said correction signal such that the phase of said correction signal is equal to said predetermined phase; said bandwidth controller for selecting a bandwidth with an adjustable range based on said correction signal, estimating an offset by interrogating said error signal; and modifying said correction signal by said offset.