Cramer-Rao界及其在DS-UWB同步问题中的应用

doi:10.13190/jbupt.200705.28.chenj

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (5): 28-32.doi: 10.13190/jbupt.200705.28.chenj

Cramer-Rao界及其在DS-UWB同步问题中的应用

陈军，周正

(北京邮电大学电信工程学院, 北京 100876)

收稿日期:2006-12-01 修回日期:2007-02-28 出版日期:2007-10-30 发布日期:2007-10-30
通讯作者: 陈军

Cramer-Rao bounds and its Application in Synchronization of DS-UWB

CHEN Jun, ZHOU Zheng

(School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)

Received:2006-12-01 Revised:2007-02-28 Online:2007-10-30 Published:2007-10-30
Contact: CHEN Jun

摘要/Abstract

摘要：

在充分考虑了IEEE定义的UWB多径信道模型以及由此产生的多径干扰的基础上，推导出一种适用于DS-UWB通信系统中数据有助（DA）和数据无助（NDA）方式下同步捕获的理论界限--修正的Cramer-Rao界。通过与基于滑动相关捕获算法的DS-UWB捕获性能的比较，证明了该理论推导结果的有效性，并得出了系统的捕获性能会随着多径时延的增加而急剧下降的结论。

关键词: 同步, 直接序列扩频-超宽带, Cramer-Rao界, IEEE标准UWB信道模型

Abstract:

Synchronization process is much complicated and essential in Ultra-Wide band (UWB) communication system for its special characteristics, extremely short transmitted pulse shape and ultra dense multi-path interference. A close-form expression of Modified Cramer-Rao bounds (MCRBs) for DS-UWB both in data-aided (DA) and non-data aided (NDA) acquisition scheme is derived. IEEE defined standard channel models are adopted in the presents of multi-access interference (MAI) during derivation. The validity of this derivation result is also confirmed by comparing this derived limit of theoretical performance and classical sliding correlation acquisition algorithm with computer simulation in fixed observation window. Meanwhile, a conclusion is obtained that the derivation under prior assumptions is a feasible tight lower bounds and the increase of multi-path delay in environment weakens the estimation performance of timing delay.

Key words: synchronization, Ultra-Wide band, DS, Cramer-Rao bounds, IEEE standard UWB channel models

中图分类号:

TN914.3

陈军，周正. Cramer-Rao界及其在DS-UWB同步问题中的应用[J]. 北京邮电大学学报, 2007, 30(5): 28-32.

CHEN Jun, ZHOU Zheng. Cramer-Rao bounds and its Application in Synchronization of DS-UWB[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(5): 28-32.

参考文献

[1] Gezici S. A rapid acquisition technique for impulse radio. PACRIM 2003, IEEE Pacific Rim Conference, 2003, 2: 627-630.
[2] Homier E A, Scholtz R A. Hybrid fixed-dwell-time search techniques for rapid acquisition of ultra-wideband signals[J]. Proceedings of the International Workshop on Ultra-Wideband, 2003: 179-191.
[3] Homier E A, Scholtz R A. Rapid acquisition of ultra-wideband signals in the dense multipath channel[J]. Ultra Wideband Systems and Technologies Digest of Papers, 2002: 105-109.
[4] Yuanjin Z, Cao R, Y Lian. A new synchronization algorithm for UWB impulse radio communication systems[J]. ICCS 2004, 2004(6): 25-29.
[5] Proakis John G. Digital communications[M]. 3rd edition. New York: McGraw Hill, 1995.
[6] Zhang Jian, Kennedy Rodney, Abhayapala Thushara. Cramer-rao lower bounds for the synchronization of UWB signals[J]. Eurasip Journal on Applied Signal Processing, 2005, 3: 426-438.
[7] Lottici V, D'Andrea A, Mengali U. Channel estimation for ultra-wideband communications[J]. Selected Areas in IEEE Journal on Communications, 2002, 20(9): 1638-1645.
[8] Win M Z, Scholtz R A. Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications[J]. IEEE Transactions on Communications, 2000, 48(4): 679-689.
[9] Boubaker N, Letaief K B. Ultra wideband DSSS for multiple access communications using antipodal signaling[J]. ICC2003 IEEE International Conference on Communications, 2003, 3: 2197-2201.
[10] Foerster J. IEEE P802.15—02/368r5—SG3a—2002,Channel modeling sub-committee report final[S]. 2002.
[11] D'Andrea A, Mengali U, Reggiannini R. The modified Cramer-Rao bound and its application to synchronization problems[J]. IEEE Transactions on Communications, 1994, 42(234): 1391-1399.
[12] Tian Z, Giannakis G B. Training sequence design for data-aided timing acquisition in UWB radios[J]. IEEE International Conference on Communications, 2004, 20(6): 3399-3403.
[13] Liuqing Y, Giannakis G B. Blind UWB timing with a dirty template. ICASSP2004, 2004(4): 509.
[14] Tian Zhi, Wu Lin. Timing acquisition with noisy template for ultra-wideband communications in dense multipath[J]. Eurasip Journal on Applied Signal Processing 2005, 2005(3): 439-454.

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Cramer-Rao界及其在DS-UWB同步问题中的应用

Cramer-Rao bounds and its Application in Synchronization of DS-UWB

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