{"title":"附录D:线性调频啁啾信号的压缩","authors":"C. Elachi, J. V. Zyl","doi":"10.1002/0471783390.APP4","DOIUrl":null,"url":null,"abstract":"This means that the frequency varies linearly with time between values fc− Kτ/2 and fc+ Kτ/2. The center frequency of the chirp is fc, the chirp rate is K, and the signal bandwidth is B = Kτ. If we transmit this signal at time t = 0, we will receive a signal from a point scatterer that is a distance R away after a time tR, where tR = 2R c D 4 This received signal can be written as vr t = αv t− tR D 5 where the constant α takes into account any attenuation during propagation, as well as the radar cross section of the scatterer. The pulse is compressed by convolving the received signal with a replica of the transmitted signal:","PeriodicalId":285445,"journal":{"name":"Introduction to the Physics and Techniques of Remote Sensing","volume":"31 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Appendix D: Compression of a Linear FM Chirp Signal\",\"authors\":\"C. Elachi, J. V. Zyl\",\"doi\":\"10.1002/0471783390.APP4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This means that the frequency varies linearly with time between values fc− Kτ/2 and fc+ Kτ/2. The center frequency of the chirp is fc, the chirp rate is K, and the signal bandwidth is B = Kτ. If we transmit this signal at time t = 0, we will receive a signal from a point scatterer that is a distance R away after a time tR, where tR = 2R c D 4 This received signal can be written as vr t = αv t− tR D 5 where the constant α takes into account any attenuation during propagation, as well as the radar cross section of the scatterer. The pulse is compressed by convolving the received signal with a replica of the transmitted signal:\",\"PeriodicalId\":285445,\"journal\":{\"name\":\"Introduction to the Physics and Techniques of Remote Sensing\",\"volume\":\"31 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2006-05-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Introduction to the Physics and Techniques of Remote Sensing\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/0471783390.APP4\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Introduction to the Physics and Techniques of Remote Sensing","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/0471783390.APP4","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
摘要
这意味着频率在fc−Kτ/2和fc+ Kτ/2之间随时间线性变化。啁啾的中心频率为fc，啁啾速率为K，信号带宽为B = Kτ。如果我们在时间t = 0发射这个信号，我们将在时间tR = 2R c D 4之后接收到距离R的点散射体的信号，接收到的信号可以写成vr t = αv t - tR D 5，其中常数α考虑了传播过程中的任何衰减，以及散射体的雷达横截面。通过将接收到的信号与发射信号的副本进行卷积来压缩脉冲:
Appendix D: Compression of a Linear FM Chirp Signal
This means that the frequency varies linearly with time between values fc− Kτ/2 and fc+ Kτ/2. The center frequency of the chirp is fc, the chirp rate is K, and the signal bandwidth is B = Kτ. If we transmit this signal at time t = 0, we will receive a signal from a point scatterer that is a distance R away after a time tR, where tR = 2R c D 4 This received signal can be written as vr t = αv t− tR D 5 where the constant α takes into account any attenuation during propagation, as well as the radar cross section of the scatterer. The pulse is compressed by convolving the received signal with a replica of the transmitted signal:
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