| 被动测距声呐中信号模糊对时延估计的影响 |
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| 引用本文： | 姚蓝,樊羚珂.被动测距声呐中信号模糊对时延估计的影响[J].哈尔滨工程大学学报,1987(3). |
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| 作者姓名： | 姚蓝 樊羚珂 |
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| 作者单位： | 哈尔滨船舶工程学院水声工程系
(姚蓝)，哈尔滨船舶工程学院水声工程系(樊羚珂) |
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| 摘 要： | 被动测距声呐中的关键技术问题是对两对水听器所接收信号的时间差进行估计.通常,这种时延估计的误差用Crammer-Rao下限来描述.本文利用现代估计理论中的Ziv-Zakai方法,结合被动测距声呐的特点以及有关模拟计算结果,对这种时延估计中的信号模糊问题进行了讨论.结论是:被动测距声呐时延估计中的信号模糊影响具有普遍性.在声呐的设计中可利用Ziv-Zakai理论作为分析工具,讨论各参数的取定,也可利用该理论对已知声呐系统的技术指标进行预估.
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| 关 键 词： | 时延 估计 被动声呐/模糊信号 |
The Influence of Signal Ambiguous to the Time Delay Estimation in Passive Ranging Sonars |
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| Yao Lan Fan Lingke.The Influence of Signal Ambiguous to the Time Delay Estimation in Passive Ranging Sonars[J].Journal of Harbin Engineering University,1987(3). |
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| Authors: | Yao Lan Fan Lingke |
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| Affiliation: | Dept. of Underwater Acoustical Eng. |
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| Abstract: | The Time Delay Estimation (TDE) is very important in passive ranging sonars.The authors have made use of advanced estimation theories to analyze the influence of signal ambiguous to the TDE in this field.The application conditions of the Crammer-Rao Lower Bound(CRLB)and the Ziv-Zakai Lower Bound (ZZLB) are discussed.Based on the given condition, some simulation results are given as well.In the paper a suggestion has been made that ZZLB can be used by designers as an analytical tool of passive ranging sonars. |
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| Keywords: | time delay estimation passive sonar/blurring signal |
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