Patent ID: 7375680
Filing Date: 2008-05-20
Classification: G01S

Abstract:
1. A method for compensating for distortion from a dispersive medium, comprising: receiving a modulated radio-frequency (RF) signal that has propagated through said dispersive medium, wherein the modulated RF signal is received from a satellite source; downconverting said modulated RF signal to produce a baseband signal, wherein the baseband signal preserves an upper sideband and a lower sideband present in the modulated RF signal; tracking a first downconverted carrier phase corresponding to the upper sideband; tracking a second downconverted carrier phase corresponding to the lower sideband, wherein at least one of the first tracked downconverted carrier phase or the second tracked downconverted carrier phase is used to determine a range measurement to the satellite source; extracting a phase difference between said first downconverted carrier phase and said second downconverted carrier phase; and determining a correction for the range measurement to the satellite source based at least in part on said extracted phase difference.