A GPS receiver receives GPS spread spectrum communication signals subject to carrier demodulation and code phase autocorrelation using tightly coupled Kalman filter residual estimation based on Ricatti matrix computation for generating code phase errors and carrier phase errors for improved code phase tracking and carrier phase tracking in feedback loops for use in navigation systems.
Keywords: kalman filter, receiver, estimator, GPS
International Class: G01S1/00, G01S19/26, H04B1/7085, H04L27/00, H04B1/69