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原文传递 Active Sonar Waveform Design Matched to a Spherical Target and an Undersea Channel.

题名：	Active Sonar Waveform Design Matched to a Spherical Target and an Undersea Channel.
作者：	McCorkle, J. C.
关键词：	Response bands, Unmanned underwater vehicles, Frequency bands, Waveforms, Detection, Acoustics, Acoustic reflection, Ambient noise, Digital signal processing, Frequency domain, Monte carlo method, Wave propagation, Acoustic waves, Active sonar, Cw(continuous wave), Lfm(linear-frequency modulated), Snr(signal-to-noise ratio), Awgn(additive white gaussian noise), Ltisv(linear time-invariant space-variant), Sinr(signal-to-interference-plus-noise ratio)
摘要：	Traditionally, active sonar systems employ an enveloped-continuous wave (CW) or linear-frequency modulated (LFM) acoustic pulse that is transmitted into a lossy channel to interact with the target and environment where the received energy is used to determine if target detection occurs. Many frequency components of a wideband pulse are strongly attenuated due to the effects of the channel and target. In this work, a full-wave solution is used to model a complex channel frequency response. A realistic resonant sphere is used to develop the target response. To exploit the channel-target frequency response, two waveform design techniques are used: signal-to-noise ratio (SNR)-based and information-based methods. Both techniques concentrate the transmit energy in the frequency bands where the target echo is large. The advantage of the Eigen waveform (SNR-based) and the mutual-information (information-based) waveform over the wideband acoustic waveform is the increase in detection probability.
报告类型：	科技报告