城市无线电噪声的测量及分布规律研究

The Improved Logistic -Map Chaotic Spread -Spectrum Sequences

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.