System and method for blindly acquiring frequency hopped spread spectrum signals
AssigneeThe Boeing Company
InventorsELY SOTO, James Chris Rector
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Abstract
A system and method for acquiring a frequency hopped spread spectrum (FHSS) signal with no prior knowledge about the FHSS signal. In example implementations, an RF signal is received at a receiver. The RF signal is converted into a stream of digital signal levels. Energy detections are identified in the stream of digital signal as possible hops of a FHSS signal. A feature set is blindly acquired for defining an FHSS signal from the energy detections. At least one waveform classification is generated based on the feature set. Energy detections are re-acquired from the RF signal based on the waveform classification.
Claims20
A method for acquiring a frequency hopped signal with no prior knowledge about the frequency hopped signal, the method comprising:
- receiving an radio frequency (RF) signal at a receiver;
- converting the RF signal into a stream of digital signal levels;
- identifying energy detections in the stream of digital signal levels as possible hops of the frequency hopped signal;
- blindly acquiring a feature set for defining the frequency hopped signal from the energy detections;
- generating at least one waveform classification based on the feature set;
- directly acquiring energy detections from the RF signal based on the waveform classification;
- and
- reporting the at least one waveform classification as the frequency hopped signal.
A system for acquiring a frequency hopped signal with no prior knowledge about the frequency hopped signal, the system comprising:
- a receiver including at least one antenna for receiving an RF signal;
- a digitizer, wherein the digitizer is configured to perform analog to digital conversion of the RF signal and resulting convert the RF signal to a digital signal stream;
- an energy detector, wherein the energy detector is configured to identify energy detections in the digital signal stream;
- a processor;
- and
- a non-transitory computer-readable medium storing processor-executable instructions that when executed by the processor are configured to perform functions for
- a blind acquisition component that is configured to blindly acquire a feature set for defining a frequency hopped signal from the energy detections,
- a full ensemble waveform classifier that is configured to generate at least one waveform classification based on the feature set,
- a directed re-acquisition component that is configured to acquire energy detections based on the waveform classification, and
- report generator that is configured to report the at least one waveform classification as a frequency hopped signal.
Dependencies are inferred from the claim text.