【作者】 王辉宇； 沙学军； 张乃通；

【Author】 WANG Hui-yu, Sha Xue-jun, ZHANG Nai-tong (Communication Research Center, Harbin Institute of Technology, Harbin, 150001, China)

【机构】 哈尔滨工业大学通信技术研究所；

【摘要】 研究了基于跳时多址的UWB系统在多径环境中的多址接入干扰分析模型。通过研究干扰脉冲的出现时间的概率分布,分析了终端之间的多址接入干扰。分析结果显示,如果适当的设置跳时步长使之与系统覆盖范围满足一定关系,则在每个脉冲重复周期内干扰脉冲相对于被干扰脉冲的出现时间可以近似看成均匀分布,从而使多址干扰降到最小。通过把一个干扰脉冲引起的所有多径分量折算成一个在干扰效果上等效的干扰脉冲,可以把多址接入模型的应用范围扩展到多径条件下,并且仍然保持简单。更多还原

【Abstract】 An analytical method of Multiple Access Interference (MAI) of the TH-UWB in the multipath circumstance is studied. After study on the arriving time probability distribution of the interference impulse the interference among terminals is analyzed. The analysis shows, arrive time of the interference impulse accords uniformity distribution when the step of time hopping is set to satisfy the some relation with the covering area. And the MAI is minimized. To derive a computationally simple approximation of the MAI in multipath circumstance, the all reflections of impulse are converted into one equivalent interference impulse.更多还原