基于BELLHOP 模型的宽带信号波形预报
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Keywords: 射线模型,宽带传播模型,波形预报
Abstract:
为解决信号级声纳仿真系统的水声传输信道宽带信号波形预报问题,采用射线模型的基本原理,推导了基于射线的宽带水声信道响应函数。并在Pekeris环境条件下,分析比较了基于BELLHOP射线模型的时域宽带模型与基于BDRM模型的频域宽带模型波形预报结果。结果表明,水声信道具有典型的时域数字滤波器特征,其本质是对脉冲信号进行延迟、加权和求和,这种延迟求和会导致系统频域幅度响应函数呈现“梳状滤波器”形状。在一定条件下,射线模型与简正波模型具有同等计算精度,由于射线模型通过一次计算就能得到所有本征声线的幅度和延迟,相对于简正波模型来说,计算效率更高。同时利用射线模型,能够方便地选择接收特定角度出射的本征声线。
| [1] | 杨士莪 水声传播原理 1990
|
| [2] | Orchard B J;Siegmann W L;Jacobson M J Three-dimensional time-domain paraxial approxima-tions for ocean acoustic wave propagation 1992(2)
|
| [3] | Porter M B;Bucker H P Gaussian beam tracing for computing ocean acoustic fields 1987(4)
|
| [4] | Karrenberg U;李秀梅;肖泳;毕国安 信号处理的交互式多媒体教程 2008
|
| [5] | 惠俊英;生雪莉 水下声信道 2007
|
| [6] | Jensen F;Kuperman W;Porter M Computational Ocean Acoustics 1994
|
| [7] | Porter M B;Liu Yong-chun Finite-element ray trac-ing 1994
|
| [8] | Weinberg H;Keenan R E Gaussian ray bundless for modeling high-frequency propagation loss under shal-low-water conditions 1996(3)
|
| [9] | 布列霍夫斯基 分层介质中的波(中译本) 1985
|
| [10] | Jensen F B Wave theory modeling:a convenient ap-proach to CW and pulse propagation modeling in low-frequency acoustics 1988(1)
|
| [11] | Jensen F B CW and pulse propagation modeling in ocean acoustics 1993
|
| [12] | Futa K;Kikuchi T Finite difference time domain analysis of bottom effect on sound propagation in shallow wa-ter 2001
|
| [13] | 何怡;张仁和;朱业 水下声道中脉冲传播的 WKBZ简正波方法 1994(6)
|
| [14] | 朱业;张仁和 负跃层浅海中的脉冲声传播 1996(3)
|
| [15] | 张学磊;李整林;张仁和 利用船辐射噪声反演海底吸收 2007(5)
|
| [16] | 李整林;鄢锦;李风华 由简正波群延时及幅度反演海底参数 2002(6)
|
| [17] | McDonald B E;Kuperman W A Time domain formula-tion for pulse propagation including nonlinear behavior at a caustic 1987(5)
|
| [18] | Kuperman W A models of sound propagation in the Ocean 1985(3)
|
| [19] | Porter M B The time-marched fast-field program (FFP) for modeling acoustic pulse propagation 1990(5)
|
| [20] | Collins M D The time-domain solution of the wide-angle parabolic equation including the effects of sediment dispersion 1988(6)
|
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