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Single or dual complex subcarrier downconversion

  • US 9,361,488 B2
  • Filed: 06/21/2011
  • Issued: 06/07/2016
  • Est. Priority Date: 07/01/2010
  • Status: Active Grant
First Claim
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1. A method for subcarrier downconversion and data detection, the method comprising:

  • determining whether to use an upper sideband frequency section of a complex downconverter output, a lower sideband frequency section of the complex downconverter output, or both sideband frequency sections of the complex downconverter output; and

    processing, in a circuit, the output corresponding to the selected sideband frequency section or sections based on the determination, wherein the processing includes correlation and data detection,wherein the circuit includes correlator blocks corresponding to each of the sideband frequency sections;

    wherein the correlator blocks include a series of windowed integrators that are configurable for different lengths;

    wherein when the determination is to use outputs of both sideband sections, outputs of correlator blocks of the circuit are combined after magnitude detection and before data slicing; and

    wherein outputs of the windowed integrators of each correlator block are added in a first path of the correlator block and subtracted in a second path of the correlator block, and wherein the magnitude detection is performed by complex-to-magnitude modules.

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