ON THE DETECTION OF A KNOWN SIGNAL IN SEA NOISE.
DUKE UNIV DURHAM N C DEPT OF ELECTRICAL ENGINEERING
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The purpose of this report is to further the theory of signal detectability in underwater acoustics. A non-stationary statistical model for ocean noise is presented, utilizing the concept of an n-dimensional vector-sample n samples considered at a time. The standard deviation of the noise is assumed to be Rayleigh distributed. This noise model is then used in the design of a likelihood ratio receiver for the known-signal case. A performance comparison of this likelihood ratio receiver with a design assuming stationary Gaussian noise a correlator shows that the receiver design assuming the nonstationary ocean noise model is the superior one when both are operated in a shallow-water noise environment. Author
- Physical and Dynamic Oceanography