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引言任何电子系统的性能都与信噪比有关.例如,一个雷达或通信系统接收到的信号必须与接收机中产生的噪声相抗衡,与通过天线和信号一起接收的噪声相抗衡.外部产生的自然噪声实质上是高斯型的,可以采用等效的天线噪声温度来描述。天线噪声温度和接收机噪声温度之和确定系统噪声温度。根据这一点,系统工程师就可以通过计算 S/N 或 E b/N o 来确定雷达的探测概率或数字通信系统的误差概率。
Introduction The performance of any electronic system is related to the signal to noise ratio.For example, the signal received by a radar or communications system must contend with the noise generated in the receiver and with the noise received through the antenna and the signal.Externally generated Natural noise is essentially Gaussian and can be described using the equivalent antenna noise temperature. The sum of the antenna noise temperature and the receiver noise temperature determines the system noise temperature. From this point, system engineers can determine the probing probability of a radar or the error probability of a digital communication system by calculating S / N or E b / N o.