A Pseudorandom Signal Correlation Method for Underwater Acoustic Studies
NAVY ELECTRONICS LAB SAN DIEGO CA
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It is the purpose of this paper to present the method of pseudorandom signal pseudonoise correlation measurements and to demonstrate theoretically and experimentally that the results are different from and unpredictable from those obtained by employing the usual filtering and detection of impulsive explosive or single frequency signals. Since the crosscorrelation of the received underwater acoustic signal with that transmitted is a measure of the feasibility of signal processing techniques employing coherent time averaging, these measurements are of practical importance. A study of such correlation coefficients as a function of the averaging time frequency, and bandwidth of the signal and of the locations and motions of the source and receiver will lead finally to determination of those properties of the medium and its boundaries which perturb underwater acoustic propagation.
- Acoustic Detection and Detectors