US 2025/0147141 A1 · Code and Doppler based Multipath Mitigation

Abstract

A multipath signal is received comprising a PRN code used to determine time of arrival of a signal of interest. A correlated received signal is generated by filtering and correlating of the received multipath signal. Short-term accumulation segments are generated based on the correlated received signal. Doppler hypotheses are applied to each of the short-term accumulation segments to generate phase-corrected short-term accumulated blocks. The phase-corrected short-term accumulated blocks are accumulated to generate long-term accumulated blocks for each Doppler hypothesis. Alternatively, cross-correlation samples are generated for signal samples for each short-term accumulation segment, and the cross-correlation samples are accumulated to generate a long-term accumulated block.

Claims18

Dependent claims

A method comprising:

receiving, by a computing system, a multipath signal comprising a code, the code being a Pseudo-Random-Noise (PRN) code of a system in which the code is used to determine a time of arrival of a signal of interest within the multipath signal;
generating a correlated received signal by performing, by the computing system, filtering and correlating of the received multipath signal with a local replica of the code;
generating, by the computing system, a plurality of short-term accumulation segments based on the correlated received signal;
applying, by the computing system, a plurality of Doppler hypotheses to each of the short-term accumulation segments to generate sets of phase-corrected short-term accumulated blocks;
and
accumulating, by the computing system, the phase-corrected short-term accumulated blocks to generate long-term accumulated blocks for each Doppler hypothesis.

3 more elements

Dependencies are inferred from the claim text.

Code and Doppler based Multipath Mitigation

Life of this patent

Code and Doppler based Multipath Mitigation

Life of this patent

Abstract

Claims18