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US 8,300,731 B2Granted
Methods and systems to digitally switch between frequencies and corresponding bandwidths in a transceiver
AssigneeIntel Corporation
InventorsNicholas Cowley, Kennan Herbert Laudel
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Abstract
Methods and systems to maintain a tuner at a fixed frequency and to switch between frequencies and bandwidths in a digital domain. IQ imbalance equalization coefficients may be determined with respect to a frequency and bandwidth of a first signal, and the coefficients may be applied to baseband data associated with one or more other frequencies and/or bandwidths. Methods and systems disclosed herein may be applied in a multi-mode Multimedia over Coax Alliance (MoCA) environment, such as to digitally switch between a MoCA 2 standard and a MoCA 1.x standard.
Claims10
A system, comprising:
- a receive tuner, tuned with respect to a first frequency, to down-convert a first modulated signal having a first bandwidth centered about the first frequency to baseband components centered about zero Hertz (Hz), and to down-convert a second modulated signal having a second bandwidth centered about a second frequency to a relatively low intermediate frequency (IF);
- an analog-to-digital converter (ADC) to digitize outputs of the receive tuner;
- and
- digital baseband processor including a multi-mode digital demodulator to demodulate data output from the ADC within a bandwidth that encompasses the first and second bandwidths, wherein the demodulator is digitally controllable to operate at zero Hz with respect to the first signal, and to operate at the intermediate frequency with respect to the second signal.
1 more element
Dependencies are inferred from the claim text.