Pseudonoise Tracking in the Presence of Spectrally-Known Interference

This paper describes the design of a direct-sequence code tracking loop employing generalized correlators for tracking-error estimation. The signal to be tracked is assumed to be PSK modulated by data, and carrier-phase incoherent. The correlators consist of the usual correlator circuit with realizable filters inserted in each input arm. In the proposed design technique, the tracking loop's effective signal-to-noise ratio is optimized by filter design for operation in the presence of strong colored interference of known spectral content. Performance results are given.