CAJ | 학술논문

分析了自由空间和多径2种环境下雷达探测概率与信噪比的关系，雷达探测范围以及不同反射系数和不同载频下的多径传输因子。研究结果表明，反射系数越小，探测概率曲线越接近自由空间下的变化曲线。信噪比较大时，多径衰落造成其检测性能逐渐下降。当性噪比较低时，为得到相同的检测概率，多径所需要的信噪比比自由空间下约小7 dB~8 dB。多径传输因子随着距离起伏较大，反射因子越大，多径传输因子起伏越大，其相应的暴露区裂化程度越严重。
분석료자유공간화다경2충배경하뢰체탐측개솔여신조비적관계，뢰체탐측범위이급불동반사계수화불동재빈하적다경전수인자。연구결과표명，반사계수월소，탐측개솔곡선월접근자유공간하적변화곡선。신조비교대시，다경쇠락조성기검측성능축점하강。당성조비교저시，위득도상동적검측개솔，다경소수요적신조비비자유공간하약소7 dB~8 dB。다경전수인자수착거리기복교대，반사인자월대，다경전수인자기복월대，기상응적폭로구열화정도월엄중。
The relationships between radar detection probability and signal to noise ratio under two environments including free space and the multi-path are analyzed in detail. The radar detection range and the multi-path transmission factors under different reflection coefficients and different carrier frequencies are studied as well. The results show that the smaller the reflection coefficients, the closer the detection probability curves to the curves of the free space;the detection performance declines under high Signal to Noise Ratio(SNR) due to the multipath fading; in order to get the same detection probability, the SNR required in multi-path is lower by 7 dB-8 dB than that in the free space when the SNR is low; the bigger the reflection factors, the bigger the fluctuation of multi-path transmission factors, and the corresponding cracking of exposure zone is more serious.