Patent Document ID: 9025640
Application ID: 13915649
Patent Flag: 1

Claim One:
1. A method for intra-Pre-detection Integration Time (PIT) signal decomposition of a signal received with RF front end hardware, the method comprising: sampling the received signal; aligning the sampled signal into integer multiples of a duration of a pseudorandom noise code sequence by dividing the sampled signal into vectors; computing a first search grid based on the aligned signal, including: estimating Doppler frequency offset, propagation delay, and carrier phase values, and calculating an initial amplitude estimate using the estimated Doppler frequency offset, propagation delay, and carrier phase values; coarsely estimating a plurality of initial ray parameters associated with the first computed search grid; using the coarsely estimated plurality of initial ray parameters to initiate fine estimation of the plurality of initial ray parameters utilizing stochastic search and optimization techniques; computing an estimate error for the fine estimation of the plurality of initial ray parameters; and in response to determining a reduction in the computed estimate error, removing the fine estimation of the plurality of initial ray parameters from the first computed search grid.