论文部分内容阅读
一、引言任何电子系统的性能都与信噪比(S/N)密切相关。例如,雷达或通信系统接收的信号必定会和接收机中产生的噪声以及通过天线与信号一道接收到的噪声相抗争。外部形成的天然噪声实质上就是高斯噪声,可以利用等值的天线噪声温度使其量化。把天线噪声温度和接收机噪声温度相加,就可以求得整个系统的噪声温度。就这一点而言,系统工程人员可以通过计算信噪比(S/N)或Eb/No(误比特/传输数)求得雷达的探测概率或数字通信系统
I. INTRODUCTION The performance of any electronic system is closely related to the signal to noise ratio (S / N). For example, the signals received by a radar or communications system must contend with the noise generated in the receiver and the noise received along with the signal through the antenna. The natural noise formed externally is essentially Gaussian noise, which can be quantified using the equivalent antenna noise temperature. The sum of the antenna noise temperature and the receiver noise temperature, you can find the noise temperature of the entire system. In this regard, system engineers can calculate the probing probability of the radar or the digital communication system by calculating S / N or Eb / No (bit error / number of transmissions)