Multi-tone continuous wave detection and ranging
AssigneeThe Regents of the University of California
InventorsOzdal Boyraz, Rasul Torun
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Abstract
Various examples for multi-tone continuous wave detection and ranging are disclosed herein. In some embodiments, an initial signal is generated using initial radio frequency (RF) tones, and is emitted as a multi-tone continuous wave signal. The initial signal is reflected from a target and received as a reflected signal. Resultant RF tones, including a frequency and a power, are determined from the reflected signal in a frequency domain. A frequency-domain sinusoidal wave is fitted to the resultant RF tones in the frequency domain, and a distance to the target is determined using a modulation of the frequency-domain sinusoidal wave.
Claims20
An apparatus, comprising:
- a signal emitter;
- a signal receiver;
- and
- at least one computing device comprising at least one processor and a data store comprising executable instructions, wherein the instructions, when executed by the at least one processor, cause the apparatus to at least:
- generate an initial signal based at least in part on a sum of a plurality of predetermined individual radio frequency (RF) tones, wherein the signal emitter emits the initial signal as a multi-tone continuous wave signal;
- identify a reflected signal, the reflected signal being a version of the initial signal reflected from a target, wherein the signal receiver receives the reflected signal;
- determine a plurality of resultant RF tones based at least in part on the reflected signal, a respective one of the plurality of resultant RF tones comprising a frequency and a power;
- fit a frequency-domain sinusoidal wave to the plurality of resultant RF tones in a frequency domain;
- and
- determine a distance to the target based at least in part on a modulation of the frequency-domain sinusoidal wave.
A method, comprising:
- generating an initial signal based at least in part on a sum of a plurality of predetermined individual radio frequency (RF) tones, wherein a signal emitter emits the initial signal as a multi-tone continuous wave signal;
- identifying a reflected signal, the reflected signal being a version of the initial signal reflected from a target, wherein a signal receiver receives the reflected signal;
- determining a plurality of resultant RF tones based at least in part on the reflected signal, a respective one of the plurality of resultant RF tones comprising a frequency and a power;
- fitting a frequency-domain sinusoidal wave to the plurality of resultant RF tones in a frequency domain;
- and
- determining a distance to the target based at least in part on a modulation of the frequency-domain sinusoidal wave.
Dependencies are inferred from the claim text.