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Apparatus and method for correcting signal imbalances using complex multiplication

  • US 7,069,284 B2
  • Filed: 09/17/2001
  • Issued: 06/27/2006
  • Est. Priority Date: 09/17/2001
  • Status: Expired due to Term
First Claim
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1. A complex multiplier for adjusting phase and/or gain imbalances in a digital signal comprising:

  • a first set of multiplication units to multiply an in-phase (“

    I”

    ) component of said signal by a first set of coefficients; and

    a second set of multiplication units to multiply a quadrature (“

    Q”

    ) component of said signal by a second set of coefficients,wherein said I and Q components are transmitted from an output of a fast-Fourier transform (“

    FET”

    ) module, andwherein each of said coefficients in said first set and said second set are independently modifiable,and further comprising at least two adders, each adder arranged to sum an output of the first set of multiplication units together with an output of the second set of multiplication units produce an output result that is a linear function of both the I and Q components.

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