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The Key Technology of Active Sonar Detection Based on Time Reversal and MIMO
Author: CaiLiFeng
Tutor: PanXiang
School: Zhejiang University
Course: Information and Communication Engineering
Keywords: Active Target Detection When anti- Focus Multiple-input multiple-output (MIMO) Diversity
CLC: TB566
Type: Master's thesis
Year: 2010
Downloads: 165
Quote: 4
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Abstract
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Hydroacoustic technology is an effective means of development of marine resources , the military also has an important role. In shallow water waveguide environment, because there is a serious acoustic propagation delay spread and Doppler shift , conventional sonar performance degradation , need to study and develop new acoustic signal processing methods. When anti- handling (time reversal processing, TRP) will introduce ocean itself as a filter signal processing framework has good tolerance , multiple-input multiple-output (multiple input multiple output, MIMO) mining and processing methods utilized target diversity characteristics , overcome fading channel fading and goals , enhance target detection capability . This article will combine the two, for TR-MIMO active target detection mechanism and experimental studies . Coherent and non- coherent processing from a starting signal in three orthogonal transmit diversity waveform design for the target features, the transmit beam is formed by the counter while suppressing reverberation echo enhancement goals , while at the receiving end using the combination of anti- focused beamforming matched filtering to achieve the target ranging. Numerical simulations and laboratory experiments demonstrated waveguide TR-MIMO detection method can effectively improve the ability to detect the target . In addition, based on the realization of the objectives horizontal array direction finding and ranging .
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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Underwater Acoustics > Underwater acoustic detection
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