Abstract:
The accurate and timely discovery of radio receivers can assist in the detection of radio-controlled explosives. Superheterodyne receivers emit low-power radio signals du...Show MoreMetadata
Abstract:
The accurate and timely discovery of radio receivers can assist in the detection of radio-controlled explosives. Superheterodyne receivers emit low-power radio signals during normal operation. These are known as unintended emissions. In this paper, the unintended emissions of superheterodyne receivers are analyzed. Such receivers are exposed to known stimulation signals, and their behavior is measured. Recorded emissions demonstrate that it is possible to inject arbitrary signals into a radio's unintended emissions using a relatively weak stimulation signal. This effect is called stimulated emissions. A novel detection system that uses these stimulated emissions is proposed. The performance of this system is compared with passive-detection techniques using artificially generated emissions signals. The proposed system offers a 5- to 10-dB sensitivity improvement over existing techniques.
Published in: IEEE Transactions on Instrumentation and Measurement ( Volume: 60, Issue: 4, April 2011)
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- IEEE Keywords
- Index Terms
- Stimulated Emission ,
- Weak Signal ,
- Radio Waves ,
- Stimulation Of Signaling ,
- Radio Reception ,
- False Positive ,
- Fast Fourier Transform ,
- Additive Noise ,
- Frequency Shift ,
- Duty Cycle ,
- Carrier Frequency ,
- Square Wave ,
- Local Oscillator ,
- Preset Threshold ,
- Theoretical Performance ,
- High Frequency Oscillations ,
- Television Set ,
- Matched Filter ,
- Secondary Electron Emission ,
- Local Oscillator Signal ,
- Emission Frequency ,
- Complex Envelope ,
- Intermittent Use ,
- High-energy Emission
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Stimulated Emission ,
- Weak Signal ,
- Radio Waves ,
- Stimulation Of Signaling ,
- Radio Reception ,
- False Positive ,
- Fast Fourier Transform ,
- Additive Noise ,
- Frequency Shift ,
- Duty Cycle ,
- Carrier Frequency ,
- Square Wave ,
- Local Oscillator ,
- Preset Threshold ,
- Theoretical Performance ,
- High Frequency Oscillations ,
- Television Set ,
- Matched Filter ,
- Secondary Electron Emission ,
- Local Oscillator Signal ,
- Emission Frequency ,
- Complex Envelope ,
- Intermittent Use ,
- High-energy Emission
- Author Keywords