RECURSIVE HOUSEHOLDER-BASED SPACE-TIME PROCESSOR FOR JAMMER MITIGATION IN NAVIGATION RECEIVERS

摘要

In this paper a recursive, low complexity recursive space-time antijammingrnalgorithm for navigation receivers is presented. Satelliternnavigation systems use spread spectrum transmission where thernprocessing gain is not necessarily sufficient for mitigating intentionalrninterference. By using space-time processing at the receiver,rnmany both narrowband and broadband jammers may be cancelledrnsimultaneously. In this paper a low complexity and stable recursivernleast square method based on Householder transforms is proposedrnfor anti-jamming purposes. The square root matrix of inversernof the array space-time covariance matrix is updated at thernarrival of each space-time snapshot. In a GPS simulation example,rna highly reliable performance of the method is demonstratedrnin the presence many different type of jammers and time-varyingrnjamming scenarios.