【作者】 王野秋； 吕英华； 徐勇； 贺鹏飞；

【Author】 WANG Ye-qiu LU Ying-hua XU Yong HE Peng-fei(Beijing University of Posts and Telecommunications,Beijing 100876,China)

【机构】 北京邮电大学通信网络综合技术研究所；

【摘要】 超宽带(UWB)由于自身的特点非常适合于无线测距应用。在结合UWB特点基础上,提出了一种新的基于一种称为几乎完美自相关(APA)序列的测距算法,对其在AWGN信道及UWB多径信道下的测距性能进行了理论分析与系统仿真,并将其与使用普通序列的测距算法进行了测距精度比较,探讨了脉冲序列长度对精度的影响。理论分析与数值仿真结果证明,与传统序列相比,APA序列能在相同的条件(相同的信道,相同的信噪比,相同的测距序列长度)下获得更高的测距精度,且增加APA序列的长度可以进一步降低测距误差,但以更多的能量和时间为代价。因此,测距用脉冲序列的长度要根据实际情况进行选择。更多还原

【Abstract】 Ultra-wide band(UWB)is very suitable for wireless ranging application due to its some good characteristics.In this paper,considering the qualities of UWB,a new ranging algorithm based on a kind of special sequence called almost perfect autocorrelation(APA)sequence was introduced,and some theory and simulation results were gotten under AWGN channel and IEEE recommended UWB channel model respectively.The comparison results of ranging accuracy between the ranging systems with and without APA sequence were also given.Theoretic analysis and numerical results show that the APA sequence can get higher ranging accuracy than the common sequence under the same condition,and increasing the length of the APA sequences leads to better precision but at the cost of more time and energy.So the APA sequence is a good candidate for UWB ranging system and the length of APA ranging sequence should be selected according to the real situation.更多还原