METHOD AND SYSTEM FOR ESTIMATING POSITION WITH BIAS COMPENSATION

摘要

A primary phase measurement device (18) measures a first carrier phase and a second carrier phase of carrier signals received by the location-determining receiver (10). A secondary phase measurement device (30) measures the third carrier phase and the fourth carrier phase of other carrier signals. A real time kinematic engine (20) estimates a first integer ambiguity set associated with the measured first carrier phase and a second integer ambiguity set associated with the measured second carrier phase. The real time kinematic engine (20) estimates a third ambiguity set associated with the measured third carrier phase and a fourth ambiguity set associated with the measured fourth carrier phase. A compensator (32) is capable of compensating for the inter-channel bias in at least one of the third ambiguity set and the fourth ambiguity set by modeling a predictive filter (e.g., 24) in accordance with various inputs or states of the filter estimated by an estimator (26).