Research And Implementation Of GPS Anti-interference Algorithm

GPS (Global Navigation Satellite System) are becoming increasingly important rolein people’s daily life, and it provides accurate positioning for us. However, under realisticconditions GPS signal is very weak, it is easy to be intentional and unintentionalinterference with the outside world, and thus can not achieve good positioning. Therefore,at the receiving end of some anti-jamming algorithms need to be studied to respond todifferent interference, distortion-free GPS signal can be used by us.Many types of interference exist in reality, there is potential interference, it was forinterference, currently developed for some of the interference of some anti-jammingalgorithm. There are many anti-jamming algorithm, algorithms, and space-time domainalgorithm research paper mainly interference from jamming airspace. As the airspace isrelatively simple to implement anti-jamming algorithm can well suppress narrowbandinterference; Meanwhile, the space-time domain on the basis of anti-jamming algorithmfor wideband interference suppression also have a good effect. Therefore, we considerselecting power inversion algorithm, a single star single bound algorithm and a single starmulti-constrained algorithm to study three algorithms from spatial and space-time domainof these two aspects.After fully describes the various algorithms to Matlab software for the platform, thesimulation environment similar is set up to the actual environment of the three algorithmsfor simulation and analysis, the conclusion that in the presence of strong interference,jamming performance power inversion algorithm the worst, while the single star singlebound algorithm and a single star multi-constraint algorithm, multi-constrained nonlinearalgorithm makes it easier for the useful signal distortion, and therefore single star singlebound algorithm advantage. Finally, according to the actual need to build a test based onDSP and FPGA hardware platform, the algorithm is ported to the hardware platform tofurther understand the performance of various algorithms.