Detection Capabilities of Several Phase-Processing Receivers
Technical research rept.
NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT
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The operating characteristics of several phase-processing receivers for detection of a sine wave in Gaussian noise are deduced both analytically and by simulation and compared with optimum processors over a wide range of signal- to-noise ratios. Among the processors considered are the optimum phase- processor for small signal-to-noise ratio and known sine wave frequency, the maximum likelihood phase-processor for small signal-to-noise ratio and unknown sine wave frequency, the phase-difference processors for known or unknown sine wave frequency, and a phase processor that measures the scatter of phase samples about the best-fitting straight line. It is found that using phase samples alone is much better than using amplitude samples alone, and is not much less effective than using amplitude and phase samples together when the number of samples is large and the signal-to-noise ratio of each sample is small loss of amplitude information causes about 1 dB degradation in many important situations.