| m序列法测量室内脉冲响应的非线性失真分析 |
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| 引用本文： | 杨春花,黄翔东,李文元,王兆华. m序列法测量室内脉冲响应的非线性失真分析[J]. 天津大学学报(自然科学与工程技术版), 2007, 40(5): 574-578 |
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| 作者姓名： | 杨春花 黄翔东 李文元 王兆华 |
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| 作者单位： | [1]天津大学电子信息工程学院,天津300072 [2]山西大同大学物理系,大同037009 |
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| 摘 要： | m序列法测量室内脉冲响应已经被广泛接受，鉴于实际系统中的噪声和非线性会降低脉冲响应测量的精确性，对m序列法测量过程中室内系统微弱非线性所引起的失真进行了分析．叠加有微弱非线性的室内系统在时域可以等效为一个线性子系统和非线性无记忆环节的级联模型．根据该模型，推导了单一非线性作用下运用m序列法测量的室内脉冲响应误差，并且分析了该方法对各阶非线性的抑制能力．仿真实验验证了推论的正确性．
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| 关 键 词： | m序列 非线性失真 脉冲响应 |
| 文章编号： | 0493-2137（2007）05-0574-05 |
| 修稿时间： | 2006-05-222006-12-19 |
Analysis of Nonlinear Distortion in Room Impulse Response Measurement by Maximum-Length Sequences |
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| YANG Chun-hua,HUANG Xiang-dong,LI Wen-yuan,WANG Zhao-hua. Analysis of Nonlinear Distortion in Room Impulse Response Measurement by Maximum-Length Sequences[J]. Journal of Tianjin University(Science and Technology), 2007, 40(5): 574-578 |
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| Authors: | YANG Chun-hua HUANG Xiang-dong LI Wen-yuan WANG Zhao-hua |
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| Affiliation: | 1. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China ; 2. Department of Physics, University of Shanxi Datong, Datong 037009, China |
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| Abstract: | It is widely accepted to measure room impulse response using a maximumlength sequence(m-sequence) as a stimulus.However,noise and nonlinearity present in any practical measurement environment will reduce the accuracy of linear impulse response measurement.To solve this problem,the distortion caused by weak nonlinearity of room system in m-sequence measurement was investigated.Room system with weak nonlinearity was modeled in the time domain as a distributed model including a linear stage and nonlinear memoryless stages.For a single nonlinearity model of the room system,the impulse response error was obtained,and distortion immunities to different nonlinearity orders were analyzed.Simulation experiments demonstrate usefulness of our results. |
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| Keywords: | maximum-length sequences nonlinear distortion impulse response |
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