| 一种改进的基于扩频信号的混响产生模型 |
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| 引用本文： | 宁万正,王海燕,申晓红,宁焕梅,孙青岩. 一种改进的基于扩频信号的混响产生模型[J]. 微型机与应用, 2012, 31(1): 73-75 |
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| 作者姓名： | 宁万正 王海燕 申晓红 宁焕梅 孙青岩 |
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| 作者单位： | 1. 西北工业大学航海学院,陕西西安,710072
2. 东营市河口区第一中学,山东东营,257200 |
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| 摘 要： | 提出了一种某一时刻有贡献的散射体数目随时间变化的方法,并将对散射信号的求和转换为对信号与散射特性函数的卷积,简化了计算方法。仿真中,利用扩频信号作为发射信号对海面混响进行了模拟,对比分析了混响的频谱与发射信号频谱之间的关系,验证了混响瞬时值和幅值包络的分布函数。仿真和分析结果表明,混响模型可以有效地模拟实际海洋混响。
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| 关 键 词： | 混响 单元散射模型 扩频信号 频谱 统计特性 |
An improved reverberation model based on spread spectrum signal |
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| Ning Wanzheng,Wang Haiyan,Shen Xiaohong,Ning Huanmei,Sun Qingyan. An improved reverberation model based on spread spectrum signal[J]. Microcomputer & its Applications, 2012, 31(1): 73-75 |
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| Authors: | Ning Wanzheng Wang Haiyan Shen Xiaohong Ning Huanmei Sun Qingyan |
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| Affiliation: | 1(1.College of Marine Engineering,Northwestern Polytechnical University,Xi’an 710072,China;2.No.1 Middle School of He Kou,Dongying 257200,China) |
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| Abstract: | In modeling process,a method that a number of contributing scatters changing with time is put forward.The sum of scatting signals is converted to convolution between transmitted signal and scattering signal,which simplifies the calculation.In the computer simulation,using the spread spectrum signal,the surface reverberation is imitated.The relationship between the transmitted signal spectrum and the reverberation spectrum is contrasted,and the distribution functions of reverberation values and envelope amplitudes are proved.Simulation and analysis results confirm the established model can effectively be imitated actual ocean reverberation. |
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| Keywords: | reverberation unit scattering model spread spectrum signal frequency spectrum statistical property |
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