基于WiMAX系统的初始Ranging检测算法

Initial Ranging detection algorithm based on WiMAX system

初始Ranging过程是WiMAX系统上行链路中的重要过程,首先对基于差分法的Ranging检测算法进行了深入分析,然后提出了一种改进算法,该改进算法提高了低SNR下的检测率,且时偏估计的准确度大大提高,能够直接支持超远距离覆盖,解决了WiMAX系统上行接入受限问题。最后通过计算机仿真比较了改进算法的性能,仿真结果表明,所提出的改进算法在技术复杂度和系统性能上具有较大的优势。

The initial Ranging process is an important process in the uplink of WiMAX system. This paper first analyses the difference method of Ranging detection algorithm, and then proposes an improved alogrithm, the improved alogrithm improves the detection rate under low SNR, the time offset estimation accuracy is improved greatly, and long distance to cover directly, to solve the problem of limited uplink access WiMAX system. Finally, through the computer simulation comparing the performance of improved algorithm,the simulation results show that the improved algorithm has a greater advantage in technical complexity and system performance.