Exploiting Multicore Technology in Software-Defined GNSS Receivers

摘要

Methods are explored for e?ciently mapping GNSS signal processing techniques to multicore general-purpose proces- sors.The aim of this work is to exploit the emergence of multicore processors to develop more capable software- defined GNSS receivers.It is shown that conversion of a serial GNSS software receiver to parallel execution on a 4-core processor via minimally-invasive OpenMP direc- tives leads to a more than 3.6x speedup of the steady-state tracking operation.For best results with a shared-memory architecture,the tracking process should be parallelized at channel level.A post hoc tracking technique is intro- duced to improve load balancing when a small number of computationally-intensive signals such as GPS L5 are present.Finally,three GNSS applications enabled by mul- ticore processors are showcased.