KEYWORDS: Modulation, Signal to noise ratio, Sensors, Laser range finders, Distance measurement, Signal detection, Receivers, Optical communications, Phase shift keying, Signal attenuation
A novel range detection technique combines optical pulse modulation patterns with signal cross-correlation to produce
an accurate range estimate from low power signals. The cross-correlation peak is analyzed by a post-processing
algorithm such that the phase delay is proportional to the range to target. This technique produces a stable range
estimate from noisy signals. The advantage is higher accuracy obtained with relatively low optical power transmitted.
The technique is useful for low cost, low power and low mass sensors suitable for tactical use. The signal coding
technique allows applications including IFF and battlefield identification systems.
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