Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-04-18
2006-04-18
Tran, Khanh (Department: 2631)
Pulse or digital communications
Receivers
Interference or noise reduction
C370S347000
Reexamination Certificate
active
07031411
ABSTRACT:
Methods and apparatus for canceling co-channel interference in a receiving system using spatio-temporal whitening. In some embodiments, a spatio-temporal interference canceling method, and apparatus for carrying out the method are provided which effectively cancel co-channel interference despite frequency offset between the desired signal and the interferer in a TDMA type system. Real and imaginary component values of the total received signal are used for virtual diversity branches, and a vector-valued auto regressive model is used to characterize the interference. In other embodiments, spatio-temporal interference whitening is used to improve timing estimates used for synchronization. The two uses of spatio-temporal whitening can be combined in one receiver. The invention is typically implemented in one or more programmed digital signal processors or application specific integrated circuits (ASICS), embodied in a receiving system.
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Arslan Huseyin
Khayrallah Ali S.
Moore & Van Allen PLLC
Phillips Steven B.
Telefonaktiebolaget L.M. Ericsson
Tran Khanh
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