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Estimation of Sidelobe Level Variations of Phased Codes in Presence of Random Interference for Bistatic Wideband Noise Radar

机译:在对Bistatic宽带噪声雷达的随机干扰存在下相控码的侧链级变化的估计

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摘要

We discuss the importance of using the sidelobe level of the cross-correlation function as a criterion to implement a noise radar based on the transmission of wideband binary waveforms. Theoretical expressions are introduced for the parameters Peak-Sidelobe, Secondary-Sidelobe, and Integrated-Sidelobe levels for both Golay and pseudorandom binary sequences in presence of additive white Gaussian noise, relating the sequence length M to the spectral power N0 of the interfering noise. These expressions offer a valuable method for adaptive radar waveform design in order to determine sequence requirements which allow facing the noise present in the frequency band of interest. We also show a comparison of the ambiguity functions for Golay and PRBS sequences to analyze their performance in terms of Doppler and range accuracy. We describe a practical implementation of a pseudonoise waveform-based bistatic radar with reduced sidelobe level due to the use of Golay codes in combination with single side band modulation and operation at UHF band. Experimental measurements were performed in actual scenarios for ranging test of single and double targets. Linear polarizations were combined with different length sequences to determine their influence on the sounder performance under field test conditions.
机译:我们讨论使用互相关功能的侧链级别作为基于宽带二进制波形的传输来实现噪声雷达的标准的重要性。为Golay和伪随机二进制序列的参数峰旁瓣,二次旁瓣和集成旁边序列引入了理论表达,在存在附加的白色高斯噪声中,将序列长度M与干扰噪声的光谱功率N0相关联。这些表达式提供了一种用于自适应雷达波形设计的有价值的方法,以确定允许面对频带频带中存在的噪声的序列要求。我们还显示了Golay和PRBS序列的模糊功能的比较,以分析其在多普勒和范围精度方面的性能。我们描述了一种基于伪型波形的基于伪曲线的实际实现,其具有降低的侧链水平,因为在UHF频带的单侧带调制和操作中使用了Golay码。在实际情况下进行实验测量,用于测距单一和双目标的测距。将线性偏振与不同的长度序列组合,以确定其对现场测试条件下对探测性能的影响。

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