Interference Cancellation And Receive Diversity For Single-valued Modulation Receivers

Abstract

A combined SAIC receiver and a multiple-antenna, receive diversity receiver are employed to reduce interference in a wireless system. The real and imaginary parts of the de-rotated signal for each receive path associated with an antenna are separately filtered and a combined output signal of all receive paths is generated. The weighting coefficients are adjusted based on an error signal produced by comparing the combined output signal with a reference signal. The weighting coefficients are initially set based on an MMSE/LS type of signal processing criteria, where the reference signal is the Training Sequence Code (TSC). Subsequent adjustment/tracking can be accomplished by using known tracking algorithms, e.g. LMS or RLS, or the coefficients can be re-computed using MMSE/LS processing. The reference signal for tracking may be a combination of the TSC and estimated data symbols provided by an equalizer.


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Document History
  • Publication: May 24, 2011
  • Application: Nov 10, 2008
    US US 26825108 A
  • Priority: Nov 10, 2008
    US US 26825108 A
  • Priority: Mar 24, 2005
    US US 8836805 A
  • Priority: Mar 25, 2004
    US US 55622804 P

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