Signal peak-to-average power ratio (PAR) reduction
First Claim
1. A method of reducing a peak to average power ratio (PAR) of a signal comprising:
- comparing an input signal with a compressed signal to generate an error signal indicating distortion between the input signal and the compressed signal;
filtering the error signal based on an in-band frequency range to generate an in-band error signal indicating in-band distortion of the compressed signal with respect to the input signal from which the compressed signal is generated;
filtering the error signal based on an out-of-band frequency range to generate an out-of-band error signal indicating out-of-band distortion of the compressed signal with respect to the input signal;
applying an in-band gain to the in-band error signal to generate an adjusted in-band error signal;
applying an out-of-band gain to the out-of-band error signal to generate an adjusted out-of-band error signal; and
combining the compressed signal with the adjusted in-band error signal and the adjusted out-of-band error signal to generate an output signal, the compressed signal being combined with the adjusted in-band error signal and the adjusted out-of-band error signal, and the in-band gain and the out-of-band gain being based on the output signal such that distortion of the output signal is reduced with respect to distortion of the compressed signal.
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Accused Products
Abstract
A method of reducing a peak to average power ratio (PAR) of a signal may include generating an in-band error signal indicating in-band distortion of a compressed signal and generating an out-of-band error signal indicating out-of-band distortion of the compressed signal. The method may further include applying an in-band gain to the in-band error signal to generate an adjusted in-band error signal and applying an out-of-band gain to the out-of-band error signal to generate an adjusted out-of-band error signal. The method may also include combining the compressed signal with the adjusted in-band error signal and the adjusted out-of-band error signal to generate an output signal. The compressed signal may be combined with the adjusted error signals, and the in-band gain and the out-of-band gain may be based on the output signal such that distortion of the output signal is reduced with respect to distortion of the compressed signal.
14 Citations
18 Claims
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1. A method of reducing a peak to average power ratio (PAR) of a signal comprising:
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comparing an input signal with a compressed signal to generate an error signal indicating distortion between the input signal and the compressed signal; filtering the error signal based on an in-band frequency range to generate an in-band error signal indicating in-band distortion of the compressed signal with respect to the input signal from which the compressed signal is generated; filtering the error signal based on an out-of-band frequency range to generate an out-of-band error signal indicating out-of-band distortion of the compressed signal with respect to the input signal; applying an in-band gain to the in-band error signal to generate an adjusted in-band error signal; applying an out-of-band gain to the out-of-band error signal to generate an adjusted out-of-band error signal; and combining the compressed signal with the adjusted in-band error signal and the adjusted out-of-band error signal to generate an output signal, the compressed signal being combined with the adjusted in-band error signal and the adjusted out-of-band error signal, and the in-band gain and the out-of-band gain being based on the output signal such that distortion of the output signal is reduced with respect to distortion of the compressed signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system of reducing a peak-to-average power ratio (PAR) of a signal comprising:
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an error detection module, comprising; a comparator configured to compare an input signal with a compressed signal to generate an error signal indicating distortion between the input signal and the compressed signal; an in-band filter configured to filter the error signal based on an in-band frequency range to generate an in-band error signal indicating in-band distortion of the compressed signal with respect to the input signal from which the compressed signal is generated; and an out-of-band filter configured to filter the error signal based on an out-of-band frequency range to generate an out-of-band error signal indicating out-of-band distortion of the compressed signal with respect to the input signal; an in-band gain unit configured to apply an in-band gain to the in-band error signal to generate an adjusted in-band error signal; an out-of-band gain unit configured to apply an out-of-band gain to the out-of-band error signal to generate an adjusted out-of-band error signal; and a combining module configured to combine the compressed signal with the adjusted in-band error signal and the adjusted out-of-band error signal to generate an output signal, the combining module configured to combine the compressed signal with the adjusted in-band error signal and the adjusted out-of-band error signal, the in-band gain unit configured to apply the in-band gain based on the output signal, and the out-of-band gain unit configured to apply the out-of-band gain based on the output signal such that distortion of the output signal is reduced with respect to distortion of the compressed signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification