Reconfigurable correlator for a navigation system

摘要

Systems and methods are provided for a correlator system. The system includes a plurality of numerically controlled oscillators and a multiplier configured to receive an input stream representing a received signal. A carrier multiplexer is configured to select between respective outputs of at least two of the plurality of numerically controlled oscillators and provide the selected output to the multiplier. A code generator is configured to provide a replica code. A delay component is configured to provide a delayed code from the replica code. A code multiplexer is configured to selectively provide each of the delayed code and the replica code to the multiplier.

主权项

1. A correlator system comprising:
a plurality of numerically controlled oscillators configured to produce respective replica carrier signals; a carrier multiplexer configured to select between respective replica carrier signals produced by at least two of the plurality of numerically controlled oscillators; a code generator configured to provide a replica code; a delay component configured to provide a delayed code from the replica code; a code multiplexer configured to selectively provide one of the delayed code and the replica code to a multiplier, the multiplier being configured to further receive an input stream representing a received signal and a replica carrier signal selected at the carrier multiplexer and provide a correlation result representing a similarity of the provided code to a code associated with the received input stream; and a system control that controls each of the carrier multiplexer and the code multiplexer to select a mode of operation of the correlator system from a plurality of available modes of operation, the plurality of modes of operation comprising a traditional correlator mode, a correlator mode with a low power spectral monitoring function, a correlator mode with a flanking function, and a spectral monitoring mode, in which the correlator system provides a three complex point discrete Fourier transform.