宽带和窄带雷达在噪声中的检测性能比较

宽带雷达相比于窄带雷达具有更高的距离分辨率，因此目标起伏较小。分析了宽带无起伏目标模型，宽带瑞利起伏目标模型和宽带莱斯起伏目标模型的宽带和窄带雷达的回波特性，并推导了它们在高斯白噪声中的检测概率。检测性能曲线表明，在高检测概率时，宽带雷达比窄带雷达具有更好的检测性能；但是随着雷达分辨率的提高，宽带雷达能量积累检测器的积累损失也增加，这个因素使得当雷达带宽增加到一定程度后宽带雷达相对于窄带雷达在检测方面的优势失去意义。

Detection Performance Comparison for Wideband and Narrowband Radar in Noise

Wideband radars have higher range resolution than narrowband radars, and the target fluctuation is less. The wideband and narrowband returns of the wideband non-fluctuation target model, the wideband Rayleigh target model and the wideband Ricean target model are analyzed, and the detection probabilities of them in white Gaussian noise are deduced. The detection curves show that the wideband radars outperform the narrowband radars in the case of high detection probabilities; but the integration loss of the wideband radar energy integration detector is increased with the increasing of the wideband radar range resolution, and this factor causes that the detection predominance of the wideband radars to the narrowband radars is meaningless when the bandwidth of the radar is increased to a certain extent.