Steady-State Filter Design for Radar Tracking with Up-Chirp-Down-Chirp Waveforms

James Corwell, W. Blair, Y. Bar-Shalom
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Abstract

The up-chirp (UC) LFM waveform is known to give better radar tracking than a monotone waveform or a down-chirp LFM waveform. However, the question of the value of other LFM waveforms to tracking is raised. In this paper, the value of an up-chirp-down-chirp (UCDC) waveform to radar tracking is considered. The optimal steady-state filter for tracking a nearly constant velocity target with an UCDC waveform is investigated and compared to that for a standard UC LFM waveform. The filter gains and state covariance are shown to be defined by Discrete White Noise Acceleration (DWNA) tracking index, the sample period, normalized pulse length, and the normalized range-doppler coupling coefficient. After developing the steady-state gain and covariance relationships for tracking with an UCDC waveform, tracking performances with UCDC and UC waveforms are compared. The UCDC waveform is shown to give a decrease in track filter covariance.
上啁啾-下啁啾波形雷达跟踪的稳态滤波器设计
已知上啁啾(UC) LFM波形比单调波形或下啁啾LFM波形提供更好的雷达跟踪。然而,其他LFM波形对跟踪的价值问题也被提出。本文考虑了上啁啾-下啁啾(UCDC)波形对雷达跟踪的价值。研究了带UCDC波形的近等速目标的最优稳态滤波器,并与标准UC LFM波形的最优稳态滤波器进行了比较。滤波器增益和状态协方差由离散白噪声加速(DWNA)跟踪指数、采样周期、归一化脉冲长度和归一化距离-多普勒耦合系数定义。在建立了UCDC波形跟踪的稳态增益和协方差关系之后,比较了UCDC和UC波形的跟踪性能。UCDC波形显示出跟踪滤波器协方差的减小。
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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