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Method and system for baseband predistortion linearization in multi-channel wideband communication systems

  • US 9,913,194 B2
  • Filed: 01/08/2016
  • Issued: 03/06/2018
  • Est. Priority Date: 12/26/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • generating an address from samples of a baseband input signal, u(n-k), of a communication system, wherein k is a counter corresponding to a plurality of taps;

    retrieving from a memoryless lookup table an entry, Fm(|u(n)−

    k|), in accordance with the address for each tap of the plurality of taps;

    multiplying the baseband input signal and the entry from the memoryless lookup table to generate a multiplied signal, x(n−

    k)=u(n−

    k)·

    Fm(|u(n−

    k)|) for each tap of the plurality of taps;

    pre-equalizing the multiplied signal by multiplying, for each tap of the plurality of taps, the multiplied signal, x(n−

    k), with an indexed coefficient corresponding to a magnitude of the baseband input signal, Wkm(|u(n)|), to generate a pre-equalized signal for each tap of the plurality of taps;

    summing the pre-equalized signal for each tap of the plurality of taps to generate an output signal, z(n)=Σ

    k=0KWkm(|u(n)|)·

    x(n−

    k); and

    outputting the output signal, z(n), to a power amplifier.

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