一种低失真度多普勒测速仪回波模型的构建和分析研究

Construction and analysis of a low distortion DVL echo model

为了支撑研究并评估多普勒测速仪(Doppler Velocity Log,DVL)信号处理算法的性能,需模拟海底回波信号,故需构建失真度低的海底回波模型。文章提出了扇环形海底回波模型,在此基础上,构建了一种基于散射理论的海底回波优化模型。将此优化模型和传统模型进行了对比分析,结果表明,优化模型较传统模型,与真实海底回波之间的包络特性误差更小,宽带回波的包络特性误差降低了20%以上,验证了所构建的回波模型的有效性和优越性。

In order to support research and evaluate the performance of the Doppler velocity log(DVL)signal processing algorithm,the seabed echo signal needs to be simulated,so a low-distortion seabed echo model needs to be constructed.A fan-ring shaped seabed echo model is proposed in this paper,and on this basis,an optimized model of seabed echo based on scattering theory is constructed.A comparative analysis of the optimized seabed echo model and the traditional model is carried out.The study results show that the optimized model has a smaller error in envelope characteristics relative to the real seabed echo than the traditional model,especially the envelope characteristic error of broadband echo is reduced by more than 20%.The effectiveness and superiority of the constructed echo model is verified.