Single Hydrophone Passive Source Range Estimation Using Phase-Matched Filter

Algorithms working in mode space instead of directly matching the received complex sound pressure were developed to improve computational efficiency and robustness, but these algorithms may be inconvenient apply practice because manual operations are often inevitable when performing modal filtering. Based on a phase-matched filter, an imperfect scheme named phase based matched impulse response (MP-MIR) is proposed estimate source range rapidly conveniently with single hydrophone. The field still pressure. replica sum several “phase” modes, which can efficiently synthesized merely horizontal wavenumbers normal modes source–receiver range. effectiveness MP-MIR was demonstrated localizing 84 emissions along weakly range-dependent track at ranges 2.54–20 km South China Sea. Although it found, from cross-correlation coefficients, that signals showed strong variation even between adjacent emissions, outperformed classical (MIR) lower standard deviation most cases, demonstrating good robustness potential for practical applications.