Additive as well as multiplicative noise may occur when acoustic waves propagate through the ocean. Second-order spectral methods fail to retrieve frequencies of such random amplitude modulated harmonic time series, especially when the multiplicative noise is broadband. An existing fourth-order method assumes real Gaussian multiplicative and additive noise. A novel approach is proved herein to impose no constraints on the distribution or the color of the disturbances. It relies on fourth-order special cumulant or moment slices. In particular, the fourth-order moment spectrum is shown to offer computational advantages. Extension to multicomponent models and generalizations to alternative higher order moments are also provided. Simulations corroborate the theoretical results.
|Original language||English (US)|
|Number of pages||11|
|Journal||IEEE Journal of Oceanic Engineering|
|State||Published - Oct 1994|
Bibliographical noteFunding Information:
Manuscript received March 1, 1994; revised June 24, 1994. Part of this paper was presented at [he SPlE Con$, San Diego, CA, July 1994. The work in this paper was supported by the Office of Naval Research under ONR Grant NO00 14-93-1- 0485. The authors are with the Department of Electrical Engineering, Univer\ity of Virginia. Charlottesville, VA 22903-2342 (JSA. IEEE Log Number 9405589.