Patent ID: 6072770
Filing Date: 2000-06-06
Classification: H04B,H04L

Abstract:
A method for signaling in a CDMA-based satellite communications network, comprising the steps of:receiving an RF signal over an uplink, the RF signal containing a coded user message that has been differentially phase encoded, and spread using two code sequences associated with the uplink;non-coherently quadrature demodulating the RF signal into quadrature baseband components;despreading the quadrature baseband components using the two code sequences associated with the uplink;phase comparing consecutive blocks of the despread quadrature baseband components for regenerating the differential phase signal carrying the coded user message;switching the regenerated differential phase signal to a selected downlink transmitter;respreading the quadrature baseband components of the differential phase signal using two code sequences associated with a downlink; andimpressing the respread quadrature baseband components of the differential phase signal onto quadrature components of a downlink carrier to form a downlink RF signal.