Spatial processing for frequency diversity schemes

A novel technique to obtain optimum blind spatial processing for frequency diversity spread spectrum (FDSS) communication systems is introduced. The s ufficient statistics for a linear combiner, which prove ineffective due to the interferers frequency characteristics, are modified to yield improved d etection under partial jamming in the spectral domain. Robustness to partia l time jamming is achieved by extending the notion of replicas over the fre quency axis to a repetition over the time variable. Analysis and simulation s are provided, showing the advantages of using FDSS with spatial diversity to combat the interference when it is confined to a narrow frequency band or short time interval relative to the desired signal extent in either doma in.