期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
卷号：2
期号：3
页码：795
出版社：S&S Publications
摘要：The Linear Frequency Modulation (LFM) waveform is the most commonly and extensively used signal inpractical radar system. This paper introduces a new scheme of Piecewise Nonlinear Frequency Modulation (PNFM) forgenerating good code sets. Each code set has good autocorrelation with small peak sidelobes and cross-correlation. Aweighting function is usually applied in order to reduce the sidelobes. In an effort to achieve low autocorrelationsidelobe level without applying weighting function, PNFM signal has been investigated. The new class codes is shownto have good ambiguity function with the ability to tolerate a realistic range of Doppler shift. At the receiver a matchedfilter is used which improvement in Doppler detection with good SNR.
关键词：Piecewise Nonlinear Frequency Modulation; LFM; Ambiguity function; Chirp code; Radar
