| 主权项 |
1. A method for estimating the position of an object by a location-determining receiver associated with the object, the method comprising:
measuring a first carrier phase of each first carrier signal of a plurality of first carrier signals and a second carrier phase of each second carrier signal of a plurality of second carrier signals received by the location-determining receiver, each first carrier signal of the plurality of first carrier signals received at substantially the same frequency as others of the first carrier signals from two or more primary satellites, each second carrier signal of the plurality of second carrier signals being received at substantially the same frequency as others of the second carrier signals from two or more primary satellites; measuring a third carrier phase of each third carrier signal of a plurality of third carrier signals and a fourth carrier phase of each fourth carrier of a plurality of fourth carrier signals signal received by the location-determining receiver, each third carrier signal of the plurality of third carrier signals being transmitted at different frequencies from others of the plurality of third carrier signals from two or more secondary satellites, each fourth carrier signal of the plurality of fourth carrier signals being transmitted at different frequencies from others of the plurality of fourth carrier signals from two or more secondary satellites that results in an inter-channel bias between carrier signals from different ones of the secondary satellites observable at the location-determining receiver; estimating 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; estimating a third ambiguity set associated with the measured third carrier phase and a fourth ambiguity set associated with the measured fourth carrier phase by calculating a double difference ambiguity set associated with the third carrier signals from different secondary satellites, and calculating another double difference ambiguity set associated with the fourth carrier signals from different secondary satellites; 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 in accordance with inputs or states of the predictive filter that comprise a single difference ambiguity set associated with the third carrier signals and a single difference ambiguity set associated with the fourth carrier signals, by compensating for inter-channel bias in the double difference ambiguity sets by subtracting a pre-programmed or initial inter-channel bias data from a double difference code pre-fit residual; and determining a position of the object based on the measured first carrier phase, the measured second carrier phase, the estimated first integer ambiguity set, the estimated second integer ambiguity set, and at least one of the measured third carrier phase and the measured fourth carrier phase, and at least one of the compensated third ambiguity set and the compensated fourth ambiguity set. |
