Patent ID: 8942264
Filing Date: 2015-01-27
Classification: G01S,H04L

Abstract:
1. A receiver for receiving a binary offset carrier signal, the receiver comprising: a receiver front-end for down-converting a received composite signal; an analog-to-digital converter for converting the received composite signal to a digital received composite signal; a first signal generator for generating a first signal; a second signal generator for generating a second signal; a data storage device for providing a null code; a multiplexer for multiplexing a first combination in a first mode or a second combination of input signals in a second mode to form a precursor signal, the first combination comprising the first signal and the null code consistent with a predetermined time sequence for expression of the null code in the precursor signal, the second combination comprising the combination of the first signal and the second signal; a ranging code generator for generating a ranging code; a mixer accepting the ranging code and the precursor signal and outputting a locally generated reference signal; a code correlator for correlating the digital received composite signal to the locally generated reference signal to decode at least a first portion of the received composite signal in the first mode; a tracking loop signal processor for processing the locally generated reference signal with respect to the digital received composite signal to maximize correlation of the received composite signal to the locally generated reference signal; and a controller for controlling the multiplexor to operate in the first mode or in the second mode consistent with a level of service, geographic region, or time period authorized for the receiver or an end user of the receiver.