Patent ID: 6055231
Filing Date: 2000-04-25
Classification: H04B,H04L

Abstract:
A terrestrial RF communication system for receiving CDMA communication signals comprising:means for receiving a CDMA communication signal transmitted on a selected RF carrier frequency, including means for removing said RF carrier frequency to provide a received information signal;means for correcting phase errors of said received information signal including:means for generating a local correction signal;means for mixing said local correction signal with said received information signal to produce a phase corrected information signal;means for analyzing the phase of said phase corrected information signal and generating a phase error signal based on the deviation of the analyzed phase from a predetermined phase of zero; andmeans for adjusting the phase of said local corrected information signal continuously and recursively such that said phase is equal to said predetermined phase; said adjusting means including:means for selecting a bandwidth with an adjustable range based on said phase corrected information signal;means for estimating an offset by interrogating said phase error signal; andmeans for modifying said local correction signal by said offset.