多用户跳时超宽带系统串行码捕获性能分析
The Multiuser Acquisition Performance Analysis with TH UWB System
-
摘要: 根据超宽带系统多径延迟的特点,该文给出一种易于实现的超宽带跳时串行捕获方法;并在此基础上,着重分析了该系统在多用户环境下的系统捕获性能;最后通过理论推导和数值仿真分析了用户数量、检测概率、虚警概率、判决门限以及平均捕获时间之间的相互制约关系.从结果中看到,随着用户数的增加,检测概率将降低,而判决门限及虚警概率提高,串行捕获时间也将从微秒级增加到毫秒级.Abstract: This paper gives a serial acquisition method which can be easily implemented in time hopping ultra-wide band system. Based on this method, the acquisition performance in the multiuser environment is analyzed, and the relationships between the detection probability, false alarm probability, detection threshold and average acquisition time are given. From the theoretical analysis and numerical simulation, it is noted that with the increasing of user number, the detection probability will decrease. By contrary, the false alarm and the detection threshold will increase accordingly, and the acquisition time will also increase from s to ms.
-
Scholtz R A. Multiple access with time-hopping impulse modulation, in Proc. IEEE Military Comm. Conf. Boston, MA,October 1993:11 - 13.[2]Win M Z, Scholtz R A. Ultra-wide bandwidth time-hopping spread-spectrum implse ratio for wireless multiple-access communications[J].IEEE Trans. on Communications.2000, 48(4):679-[3]Zhao Li, Haimovich A M. Capacity of M-ary PPM ultra-wideband communications over AWGN channels.Proceedings of VTC 2001, Atlantic City, New Jersey, Oct. 2001:1964- 1968.[4]Yang Lie-Liang, Hanzo Lajos. Serial acquisition of DS-CDMA signals in multipath fading mobile channels[J].IEEE Trans. on Vehicular Technology.2001, 50(2):617-[5]Win M Z, Scholtz R A. Impulse radio: How it works. IEEE Communications Letters, 1998, 2(1): 10 - 12.[6]Homier Eric A, Scholtz R A. Rapid acquisition of ultra-wide band signals in the dense multiple channel. IEEE Conference on Ultra-Wide band systems and technologies, Baltimore, MD, USA, May2002:85 - 89.[7]Yang Lie-liang, Hanzo Lajo. Serial acquisition performance of single-carrier and multicarrier DS-CDMA over makagami-m fading channels[J].IEEE Trans. on Wireless Comm.2002, 1(4):692-[8]Zhao Li, Haimovich A M. Performance of ultra-wide band communications in the presence of interference. Proceedings of IEEE International Conference on Communications (ICC01),Helsinki, Finlan, June 2001:759 - 776. -
计量
- 文章访问数: 2395
- HTML全文浏览量: 116
- PDF下载量: 616
- 被引次数: 0
下载:
