文章基本信息

标题：SNR Enhancement Algorithm Using Multiple Chirp Symbols with Clock Drift for Accurate Ranging
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作者：Jang, Seong-Hyun ; Kim, Yeong-Sam ; Yoon, Sang-Hun 等
期刊名称：ETRI Journal
印刷版ISSN：1225-6463
电子版ISSN：2233-7326
出版年度：2011
卷号：33
期号：6
页码：841-848
DOI：10.4218/etrij.11.0111.0013
语种：English
出版社：Electronics and Telecommunications Research Institute
摘要：A signal-to-noise ratio (SNR) enhancement algorithm using multiple chirp symbols with clock drift is proposed for accurate ranging. Improvement of the ranging performance can be achieved by using the multiple chirp symbols according to Cramer-Rao lower bound; however, distortion caused by clock drift is inevitable practically. The distortion induced by the clock drift is approximated as a linear phase term, caused by carrier frequency offset, sampling time offset, and symbol time offset. SNR of the averaged chirp symbol obtained from the proposed algorithm based on the phase derotation and the symbol averaging is enhanced. Hence, the ranging performance is improved. The mathematical analysis of the SNR enhancement agrees with the simulations.
关键词：Multiple chirp symbols;SNR enhancement;clock drift;ranging;linear phase