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Wireless interference mitigation

  • US 9,654,313 B2
  • Filed: 12/03/2013
  • Issued: 05/16/2017
  • Est. Priority Date: 12/03/2012
  • Status: Active Grant
First Claim
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1. An apparatus for wireless interference mitigation within a first User Equipment (UE), the apparatus comprising:

  • at least one channel estimator to estimate a first channel transfer function associated with a first received signal designated for the first UE, and to estimate a second channel transfer function associated with a second received, interference, signal based on information provided to the apparatus from a network about a reference signal associated with the second received signal, wherein the reference signal is a UE-specific reference signal or a cell-specific reference signal;

    at least one symbol estimator, responsive to the at least one channel estimator, to process at least the first received signal to produce a symbol estimation; and

    a demodulator, responsive to the channel estimator, operable to demodulate the symbol estimation to produce an output representing a received data unit corresponding to the symbol estimation;

    the demodulator comprising a processing unit arranged to demodulate the symbol estimation using the first channel transfer function and the second channel transfer function,wherein the at least one symbol estimator comprises a symbol processor arranged to produce a set of signal candidates, ŝ

    (ti), defined as ŝ

    (ti)=slice{(hhh)

    1
    hh (r−



    ti)}, where h is the channel transfer function on a given resource element for a serving channel, g is the channel transfer function on a given resource element for the serving channel, r is the received signal, ti is an element of a set T of all possible interfering signal candidates, the superscript h represents a Hermitian transpose, and the superscript −

    1 represents a matrix inverse.

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