Sidelobe suppression on pulse compression using curve-shaped nonlinear frequency modulation

2016 1st International Conference on Information Technology, Information Systems and Electrical Engineering (ICITISEE) Pub Date : 2016-08-01 DOI:10.1109/ICITISEE.2016.7803046

B. Rohman, R. Indrawijaya, D. Kurniawan, O. Heriana, Chaeriah Bin Ali Wael

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引用次数: 7

Abstract

Pulse compression is a method for improving the range resolution of the radar systems. Linear Frequency Modulation (LFM) is a type of pulse compression which is commonly used in the radar applications because of its simplicity and Doppler tolerance. However this method provides relatively high first peak sidelobe level within around -13.3 dB. This paper presents a developed curve-shaped Nonlinear Frequency Modulation (NLFM) using second degree polynomial approach for radar pulse compression in order to reduce the sidelobe level. The radar signal is assumed has bandwidth 30 MHz while the length of pulse signal as long as 10e-6 s. The curve-shaped chirp waveform is formed by the polynomial equation utilizing the LFM waveform as the base line. According to the simulation results and analysis, using a certain polynomial equation, the curve-shaped NLFM with negative orientation provides lower sidelobe level than the LFM. The best first peak sidelobe level achieved by this proposed NLFM is approximately -18.6 dB.

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曲线型非线性调频对脉冲压缩的旁瓣抑制

脉冲压缩是提高雷达系统距离分辨率的一种方法。线性调频(LFM)是一种脉冲压缩，由于其简单和多普勒容限，在雷达应用中被广泛使用。然而，这种方法提供了相对较高的第一峰值旁瓣电平，在-13.3 dB左右。本文提出了一种利用二次多项式方法对雷达脉冲进行压缩的曲线型非线性调频方法，以降低副瓣电平。假设雷达信号带宽为30 MHz，脉冲信号长度为10e-6 s。以LFM波形为基线，利用多项式方程形成曲线型啁啾波形。根据仿真结果和分析，利用一定的多项式方程，负方向的曲线型NLFM比LFM提供更低的副瓣电平。该方法获得的最佳第一峰旁瓣电平约为-18.6 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 1st International Conference on Information Technology, Information Systems and Electrical Engineering (ICITISEE)

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