Barankin bound for range and Doppler estimation using orthogonal signal transmission
Barankin bound for range and Doppler estimation using orthogonal signal transmission
复制标题
使用正交信号传输进行距离和多普勒估计的巴兰金界限
DOI：
10.1109/radar.2006.1631781
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Tabrikian
中科院分区：
文献类型：
--
作者：
A. Pinkus;J. Tabrikian
本文推导了主动雷达（或声纳）目标距离和多普勒估计性能评估的Barankin界。Barankin界分析了两种信号的情况下：脉冲序列与脉冲之间的相同（相干）的信号，和脉冲序列与正交编码信号。在高脉冲重复频率（PRF）下，相同的信号传输导致模糊度函数中的高旁瓣，而正交信号传输允许减小旁瓣和模糊度水平。Barankin界被证明是一个有效的工具，系统分析中存在的歧义。结果表明，对于相同信号的情况下，由Barankin界预测的阈值信噪比（SNR）高于正交信号的情况。结果是伴随着最大似然（ML）模拟，这表明Barankin界预测的阈值SNR具有良好的精度。结果表明，在高信噪比下，Barankin界、Cramer-Rao界和ML是一致的。
In this paper, the Barankin bound for performance evaluation of target range and Doppler estimation by an active radar (or sonar) is derived. The Barankin bound is analyzed for two signal cases: pulse train with identical (coherent) signals between pulses, and pulse train with orthogonal coded signals. At high pulse repetition frequencies (PRF's), identical signal transmission results in high sidelobes in the ambiguity function, while orthogonal signal transmissions allows to reduce the sidelobes and the ambiguity level. The Barankin bound is shown to be an efficient tool for system analysis in the presence of ambiguities. It is shown that for the identical signals case, the threshold signal-to-noise ratio (SNR) predicted by the Barankin bound is higher than the orthogonal signals case. The results are accompanied by maximum likelihood (ML) simulations, which show that the Barankin bound predicts the threshold SNR with a good accuracy. It is shown that at high SNR's, the Barankin bound, the Cramer-Rao bound and the ML coincide.