Detection and Estimation of Direct and Reflected Navigation Satellite Signal Parameters in a Multipath Environment

A method, comprising:

• identifying, using a computing system of a user device, two or more signal peaks that fall within a tracking aperture spanning a first set of code delay values along a first dimension and a first set of frequency offset values along a second dimension based on analysis of a plurality of signals received from a first satellite, each of the plurality of signals travelling along a different path between the first satellite and the user device within a multipath (“MP”) environment, the identified two or more signal peaks corresponding to two or more signals, among the plurality of signals, whose relative code delay and relative frequency offset fall within the first set of code delay values and the first set of frequency offset values of the tracking aperture;
• determining, using the computing system, one or more peak parameter estimates for each of the at least one signal peak based on measurement of signal parameters from at least one signal peak among the identified two or more signal peaks;
• and
• providing, using the computing system, the determined one or more peak parameter estimates for each of the at least one signal peak to a position engine (“PE”) of the user device that is configured to calculate a navigation solution for the user device based at least in part on the determined one or more peak parameter estimates.

A satellite navigation device, comprising:

• a computing system, comprising:
• at least one first processor;
• and
• a first non-transitory computer readable medium communicatively coupled to the at least one first processor, the first non-transitory computer readable medium having stored thereon computer software comprising a first set of instructions that, when executed by the at least one first processor, causes the computing system to:
• identify two or more signal peaks that fall within a tracking aperture spanning a first set of code delay values along a first dimension and a first set of frequency offset values along a second dimension based on analysis of a plurality of signals received from a first satellite, each of the plurality of signals travelling along a different path between the first satellite and the satellite navigation device within a multipath (“MP”) environment, the identified two or more signal peaks corresponding to two or more signals, among the plurality of signals, whose relative code delay and relative frequency offset fall within the first set of code delay values and the first set of frequency offset values of the tracking aperture;
• determine one or more peak parameter estimates for each of the at least one signal peak based on measurement of signal parameters from at least one signal peak among the identified two or more signal peaks;
• and
• provide the determined one or more peak parameter estimates for each of the at least one signal peak to a position engine (“PE”) of the satellite navigation device that is configured to calculate a navigation solution for the satellite navigation device based at least in part on the determined one or more peak parameter estimates.