COMPUTATIONAL CIRCUITS AND METHODS FOR PROCESSING MODULATED SIGNALS HAVING NON-CONSTANT ENVELOPES
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Abstract
Circuits and methods are provided for use in a wireline or wireless transmitter to complement the digital generation of non-constant envelope modulation signals therein. A digital signal processor is configured for deconstructing a predetermined signal having an undesirable property into one or more fragment signals which do not have the undesirable property. In a preferred embodiment the predetermined signal is preconditioned by applying a preconditioning deconstruction process to another signal from which the predetermined signal is derived, whereby that other signal is deconstructed into one or more preconditioned fragment signals having an improved property over the other signal. For OFDM modulation schemes this undesirable property may be a relatively high peak-to-average power ratio. Signals formed from the fragment signals are subject to conversion to analog signals and processing by power efficient, dynamic-range limited analog circuits i.e. S Class power amplifiers (and, for wireless applications, low compression-point up-converters), before being recombined for transmission.
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Citations
90 Claims
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1-26. -26. (canceled)
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27. An apparatus, comprising:
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a deconstruction circuit capable of receiving a signal having an undesired property, said deconstruction circuit being capable of deconstructing the received signal into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property; and
a modulation circuit being capable of providing one or more modulated signals based at least in part on one or more of the fragment signals received from said deconstruction circuit. - View Dependent Claims (28, 29, 30, 31, 33)
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29-1. An apparatus as claimed in claim 27, said deconstruction circuit comprising a carrier-sorting engine capable of sorting carriers of the received signal into the one or more fragment signals.
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34. An apparatus, comprising:
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a modulation circuit being capable of providing one or more modulated signals based at least in part on a received signal having an undesired property; and
a deconstruction circuit capable of receiving the one or more modulated signals from said modulation circuit and converting the one or more modulated signals into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42)
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43. An apparatus, comprising:
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means for deconstructing a received signal having an undesired property into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property; and
means for modulating one or more of the fragment signals into one or more modulated signals, the modulated signals based at least in part on one or more of the fragment signals received from said deconstruction circuit. - View Dependent Claims (44, 45, 46, 47, 48, 49)
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50. An apparatus, comprising:
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means for modulating a received signal having an undesirable property into one or more modulated signals; and
means for converting the one or more of the modulated signals into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58)
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59. A method, comprising:
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deconstructing a received signal having an undesired property into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property; and
modulating one or more of the fragment signals into one or more modulated signals, the modulated signals based at least in part on one or more of the fragment signals from said deconstructing. - View Dependent Claims (60, 61, 62, 63, 64, 65)
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66. A method, comprising:
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modulating a received signal having an undesirable property into one or more modulated signals; and
converting the one or more of the modulated signals into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property. - View Dependent Claims (67, 68, 69, 70, 71, 72, 73, 74)
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75. An article of manufacture comprising a storage medium having instructions stored thereon that, if executed, are capable of resulting in:
- deconstructing a received signal having an undesired property into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property; and
modulating one or more of the fragment signals into one or more modulated signals, the modulated signals based at least in part on one or more of the fragment signals from said deconstructing. - View Dependent Claims (76, 77, 78, 79, 80, 81)
- deconstructing a received signal having an undesired property into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property; and
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82. An article of manufacture comprising a storage medium having instructions stored thereon that, if executed, are capable of resulting in:
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modulating a received signal having an undesirable property into one or more modulated signals; and
converting the one or more of the modulated signals into one or more fragment signals, one or more of the fragment signals at least partially not having the undesirable property. - View Dependent Claims (83, 84, 85, 86, 87, 88, 89, 90)
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Specification