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Symbol scaling with automatic gain control for wireless communication

  • US 8,149,964 B2
  • Filed: 06/25/2007
  • Issued: 04/03/2012
  • Est. Priority Date: 01/05/2007
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a processor configured to process input samples to obtain first symbols, to determine power of the input samples, to derive a symbol gain based on the power of the input samples, to scale the first symbols with the symbol gain to obtain second symbols, to estimate signal amplitude and noise variance based on the second symbols, and to compute log likelihood ratios (LLRs) for code bits of the second symbols based on the signal amplitude and noise variance; and

    a memory coupled to the processor.

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