Enhanced target detection using a new combined sonar waveform design

Azar, Omid Pakdel; Amiri, Hadi; Razzazi, Farbod

doi:10.1007/s11235-021-00761-6

Cited by 5 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, in order to design time-frequency high-resolution waveforms with reverberation suppression performance, it is necessary to combine the advantages of the above two types of signals, that is, to enhance the reverberation suppression performance of high time-frequency resolution signals or to reduce the high distance blurring sidelobe of signals with reverberation suppression performance. For this reason, in [11], a sonar waveform suitable for moving targets was designed with segmented wideband base pulse composite inter-pulse coded frequency modulation. This modulation significantly enhanced the detection performance of moving targets, but it was only effective in the case of low frequency, and the improvement of the time-frequency resolution ability needs to be further researched.…”

Section: Introductionmentioning

confidence: 99%

High-Resolution Wideband Waveform Design for Sonar Based on Multi-Parameter Modulation

Duan,

Liang,

Dai

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

The design of transmitting waveforms is an effective way to improve the detection performance of sonar systems. For the problem of high-range sidelobe when designing reverberation-resistant waveforms, this paper proposes a high-resolution wideband composite waveform design with reverberation suppression performance and a waveform parameter improvement method. Firstly, we propose a novel wideband waveform, which utilizes linear frequency modulation (LFM) as the fundamental pulse, referred to as multi-parameter coded modulation LFM pulse (MPCM-LFM). Additionally, we deduce the wideband ambiguity function for waveform design. Then, we deduce the constraint relations of the waveform parameters for different sub-band overlaps, and according to the mathematical expressions of the obtained range ambiguity function, we analyze in detail the effects of the waveform parameters on the range ambiguity function under different constraints. Secondly, on the basis of the analysis, we also propose a hopping carrier frequency constraint rule to optimize the spectral performance, and the range sidelobe is restrained effectively in significant measure by this parameter improvement method. Finally, we analyze the computer simulation results. It is obvious that our proposed waveform parameter improvement method leads to good results. The proposed improved MPCM-LFM signal shows a “near-thumbtack” ambiguity function, whose sidelobe suppression performance is superior to other classical waveforms in the desired region, and it can realize high-precision parameter estimation. In addition, the proposed improved MPCM-LFM signal possesses good performance in detecting stationary and low Doppler targets in the background of reverberation.

show abstract

Section: Introductionmentioning

confidence: 99%