Techniques for successive peak reduction crest factor reduction
First Claim
1. A method for wireless communication, comprising:
- sampling an input signal to obtain one or more signal windows;
determining that an amplitude of a first sample within a first signal window of the one or more signal windows exceeds an amplitude threshold;
combining a series of cancellation pulses with the first sample within the first signal window to obtain a reduced signal, the reduced signal comprising one or more reduced samples with amplitudes within the amplitude threshold, wherein the series of cancellation pulses comprises a first cancellation pulse and a second cancellation pulse, the second cancellation pulse being based at least in part on a first reduction of the first sample using the first cancellation pulse, and wherein the series of cancellation pulses is based at least in part on a characteristic of the first sample; and
transmitting the reduced signal.
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Abstract
Methods, systems, and devices for wireless communications are described. The described methods, systems, and devices may include sampling an input signal to obtain one or more signal windows. An amplitude of a first sample within a first signal window of the one or more signal windows may be determined to exceed an amplitude threshold. A series of cancellation pulses may be combined with the first sample within the first signal window to obtain a reduced signal, the reduced signal including one or more reduced samples each having an amplitudes within the amplitude threshold. The series of cancellation pulses may be based on a characteristic of the first sample. The reduced signal may then be transmitted. The series of cancellation pulses may be based on, for example, an envelope of the first sample. In some cases, the series of cancellation pulses may be based on a phase of the first sample.
89 Citations
30 Claims
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1. A method for wireless communication, comprising:
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sampling an input signal to obtain one or more signal windows; determining that an amplitude of a first sample within a first signal window of the one or more signal windows exceeds an amplitude threshold; combining a series of cancellation pulses with the first sample within the first signal window to obtain a reduced signal, the reduced signal comprising one or more reduced samples with amplitudes within the amplitude threshold, wherein the series of cancellation pulses comprises a first cancellation pulse and a second cancellation pulse, the second cancellation pulse being based at least in part on a first reduction of the first sample using the first cancellation pulse, and wherein the series of cancellation pulses is based at least in part on a characteristic of the first sample; and transmitting the reduced signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for wireless communication, comprising:
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means for sampling an input signal to obtain one or more signal windows; means for determining that an amplitude of a first sample within a first signal window of the one or more signal windows exceeds an amplitude threshold; means for combining a series of cancellation pulses with the first sample within the first signal window to obtain a reduced signal, the reduced signal comprising one or more reduced samples with amplitudes within the amplitude threshold, wherein the series of cancellation pulses comprises a first cancellation pulse and a second cancellation pulse, the second cancellation pulse being based at least in part on a first reduction of the first sample using the first cancellation pulse, and wherein the series of cancellation pulses is based at least in part on a characteristic of the first sample; and means for transmitting the reduced signal.
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22. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to; sample an input signal to obtain one or more signal windows; determine that an amplitude of a first sample within a first signal window of the one or more signal windows exceeds an amplitude threshold; combine a series of cancellation pulses with the first sample within the first signal window to obtain a reduced signal, the reduced signal comprising one or more reduced samples with amplitudes within the amplitude threshold, wherein the series of cancellation pulses comprises a first cancellation pulse and a second cancellation pulse, the second cancellation pulse being based at least in part on a first reduction of the first sample using the first cancellation pulse, and wherein the series of cancellation pulses is based at least in part on a characteristic of the first sample; and transmit the reduced signal. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:
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sample an input signal to obtain one or more signal windows; determine that an amplitude of a first sample within a first signal window of the one or more signal windows exceeds an amplitude threshold; combine a series of cancellation pulses with the first sample within the first signal window to obtain a reduced signal, the reduced signal comprising one or more reduced samples with amplitudes within the amplitude threshold, wherein the series of cancellation pulses comprises a first cancellation pulse and a second cancellation pulse, the second cancellation pulse being based at least in part on a first reduction of the first sample using the first cancellation pulse, and wherein the series of cancellation pulses is based at least in part on a characteristic of the first sample; and transmit the reduced signal.
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Specification