Active sequential xampling receiver for spectrum sensing
AssigneeArizona Board of Regents on behalf of Arizona State University
InventorsAnna Scaglione, Lorenzo Ferrari
Life of this patent
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Abstract
An active sequential xampling receiver for spectrum sensing is disclosed. The receiver includes a dynamically adjustable analog front end to perform sub-Nyquist energy sensing across a broad radio frequency (RF) spectrum. In an exemplary aspect, the receiver includes a dynamic modulator which modulates the broad RF spectrum to dynamically select sub-bands (e.g., RF channels) and fold their spectral content into a narrower baseband signal for energy detection. A controller adjusts the dynamic modulator to maximize utility of the spectrum detection based on past energy observations.
Claims12
A radio frequency (RF) receiver, comprising:
- a dynamic modulator configured to modulate a received signal such that one or more portions of the received signal are dynamically selected and folded into a baseband of a modulated signal;
- an energy detector configured to sample an energy of the modulated signal at a sub-Nyquist rate;
- and
- a controller configured to adjust the dynamic modulator based on an output of the energy detector.
An analog front end for a radio frequency (RF) receiver, comprising:
- a dynamic modulator configured to convert an incoming RF signal having a first bandwidth to a modulated signal by:
- selecting a set of sub-bands of the first bandwidth;
- and
- dynamically folding spectral content of the incoming RF signal in the set of sub-bands into a baseband of the modulated signal;
- and
- an energy detector configured to sense signal energy of the modulated signal within the baseband;
- wherein the set of sub-bands is selected as a function of a past output of the energy detector.
Dependencies are inferred from the claim text.