Cognitive radio spectrum sensor employing peak-to-average ratio as the signal feature
AssigneeQUALCOMM Incorporated
InventorsSushant Suresh Thakur, SaiDhiraj Amuru, Sri Rama Chakravarthy Vollala
Life of this patent
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Abstract
A white space sensing method includes measuring a peak to average power ratio (PAPR) of a signal of a channel in a spectrum band. The method also includes determining whether a ratio of the measured PAPR to a predetermined PAPR of a modulation scheme associated with the signal meets a predetermined threshold. The method further includes indicating the channel is available for use by an unlicensed user when the ratio meets the predetermined threshold.
Claims18
A white space sensing method, comprising:
- measuring a peak to average power ratio (PAPR) of a signal of a channel in a spectrum band;
- determining whether a ratio of the measured PAPR to a predetermined PAPR of a modulation scheme associated with the signal meets a predetermined threshold;
- and
- indicating that the channel is available for use by an unlicensed user when the ratio meets the predetermined threshold.
An apparatus for white space sensing, comprising:
- means for measuring a peak to average power ratio (PAPR) of a signal of a channel in a spectrum band;
- means for determining whether a ratio of the measured PAPR to a predetermined PAPR of a modulation scheme associated with the signal meets a predetermined threshold;
- and
- means for indicating that the channel is available for use by an unlicensed user when the ratio meets the predetermined threshold.
An apparatus for white space sensing, comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured:
- to measure a peak to average power ratio (PAPR) of a signal of a channel in a spectrum band;
- to determine whether a ratio of the measured PAPR to a predetermined PAPR of a modulation scheme associated with the signal meets a predetermined threshold;
- and
- to indicate that the channel is available for use by an unlicensed user when the ratio meets the predetermined threshold.
A computer program product for wireless communications in a wireless network, comprising:
- a computer-readable medium having non-transitory program code recorded thereon, the program code comprising:
- program code to measure a peak to average power ratio (PAPR) of a signal of a channel in a spectrum band;
- program code to determine whether a ratio of the measured PAPR to a predetermined PAPR of a modulation scheme associated with the signal meets a predetermined threshold;
- and
- program code to indicate that the channel is available for use by an unlicensed user when the ratio meets the predetermined threshold.
Dependencies are inferred from the claim text.