改进遗传算法准确估计cdma2000-1X 网络中的信号到达方位

针对cdma2000-1X网络中无线信号的特点和无源定位的需要,通过将N阶多项式平滑拟合及加权修正的思想融合到遗传算法中,提出了一种改进的遗传算法来消除NLOS误差和多径传播误差对载干比的影响。不仅避免了遗传算法"早熟"的发生,而且还可以根据实际情况灵活改变搜索精度,使算法搜索达到全局最优,从而实现精确估计信号到达方位的目的。经过场外试验和MATLAB仿真验证该算法可以达到比较好的效果。

Improved genetic algorithms accurately estimate the OOA of the cdma2000-1x networks

In view of the characteristics of wireless signal in cdma2000-1x network and the needs of passive location, hnprovod Genethic Algorithms have been proposed through combining the idea of N-order polynomial smoothing and then weighted amendment with C,enetical Algorithms.It has been used to eliminate the influence of Non-line-of sight error and multi-path error on the Carrier-to-Interference Ratio.Using this method not only can affeetively avoid the phenomenon of prematurity in Genetic Algorithms,but also can flexibly change the searching precision of algorithms according to the fact situations,thus the orientation of arrival signal can be estimated accurately.Through the test of field experiments and Matlab simulation experiments,fairly good results could be achieved by using this method.