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Determination of required SNR values [radar detection]

机译:确定所需的SNR值[雷达检测]

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The inverse signal-to-noise ratio (SNR) problem is defined as determining the average SNR X required to achieve a specified probability of detection Pd, given Pfa the false alarm probability, N the integration number, and K a target fluctuation parameter that encompasses the Swerling and Marcum models. Although exact expressions exist for the standard problem of determining Pd given X and the other parameters, these expressions cannot be inverted. We present here approximations for the required SNR over a wide range of parameter values. Over most of the specified parameter ranges, the magnitude of the error in these approximations is less than 1 dB, in fact mostly less than 0.5 dB. If the resulting accuracy is insufficient, then an iterative procedure is necessary and the approximate value Xap' can be used as a starting value. The Marcum case results apply directly to the radiometry inverse problem as well.
机译:信噪比(SNR)的反问题定义为:确定达到指定检测概率Pd所需的平均SNR X,给定Pfa虚警概率,N计入积分数,K包含目标波动参数Swerling和Marcum模型。尽管对于确定给定X和其他参数的Pd的标准问题存在精确的表达式,但是这些表达式无法反转。在这里,我们给出了各种参数值范围内所需SNR的近似值。在大多数指定的参数范围内,这些近似值中的误差幅度小于1 dB,实际上大多数小于0.5 dB。如果得到的精度不足,则必须进行迭代过程,并且可以将近似值Xap'用作初始值。 Marcum案例的结果也直接适用于辐射逆问题。

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