摘要
本文以等效天线噪声系数作为测量参数,测量了南京地区的城市无线电噪声,得到各类地区的噪声—频率预测方程和噪声与汽车流量的关系方程,并分析了我国城市无线电噪声的特性。
This paper derives the mathematical expression of statistical properties of chaotic sequences generated by improved Logistic Map. We find that their statistical properties are identical with those of white noise, and they are suited to be spread spectrum address sequences. The simulation results are very close to theoretical values. In practical application, the length of spread spectrum address sequence is limited, for these chaotic spread spectrum sequences we get the appropriate number of chips contained in one information bit by way of simulation.
出处
《通信学报》
EI
CSCD
北大核心
1997年第8期63-70,共8页
Journal on Communications
关键词
等效天线噪声
无线电噪声
城市噪声
测量
chaotic sequences, spread spectrum communication, correlation property