Cramer鈥揜ao lower bounds and maximum likelihood timing synchronization for dirty template UWB communications

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• 作者：Rshdee Alhakim (1)
  Kosai Raoof (2)
  Emmanuel Simeu (1)
  Youssef Serrestou (3)
  
• 关键词：Synchronization ; Timing acquisition ; Ultra ; wideband (UWB) ; Dirty template (DT) ; Cramer鈥揜ao lower bound (CRLB) ; Maximum likelihood estimator (MLE)
• 刊名：Signal, Image and Video Processing
• 出版年：2013
• 出版时间：July 2013
• 年：2013
• 卷：7
• 期：4
• 页码：741-757
• 全文大小：1070KB
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  2. Shen, X. Guizani, M., Qiu, R.C., Ngoc, T.L.: Ultra-wideband Wireless Communications and Networks. Chap. 4. pp. 53鈥?1. Wiley, London (2006). http://www.amazon.fr/Ultra-Wideband-Wireless-Communications-Networks-Xuemin/dp/0470011440
  3. Homier, E.A., Scholtz, R.A.: Rapid acquisition of ultra-wideband signals in the dense multipath channel. In: Proceedings of IEEE Conference on Ultra Wideband Systems and Technologies, Baltimore, MD, 20鈥?3 May 2002, pp. 105鈥?10
  4. Fleming, R., Kushner, C., Roberts, G., Nandiwada, U.: Rapid acquisition for ultra-wideband localizers. In: Proceedings of IEEE Conference on Ultra Wideband Systems and Technologies, Baltimore, MD, 20鈥?3 May 2002, pp. 245鈥?50
  5. Yang, L., Tian, Z., Giannakis, G.B.: Non-data aided timing acquisition of ultra-wideband transmissions using cyclostationarity. In: Proceedings of IEEE Conference on ASSP, Hong Kong, China, 6鈥?0 April 2003, pp. 121鈥?24
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• 作者单位：Rshdee Alhakim (1)
  Kosai Raoof (2)
  Emmanuel Simeu (1)
  Youssef Serrestou (3)
  
  1. TIMA Laboratory, Grenoble University, 46 Av. F茅lix Viallet, 38031, Grenoble Cedex, France
  2. LAUM Laboratory, Maine University, Av. Olivier Messiaen, 72085, Le Mans, France
  3. Acad茅mie de Grenoble, 160 rue Faventines, BP 2137, 26021, Cedex Valence, France
  
• ISSN：1863-1711

文摘

Timing acquisition constitutes a major challenge in realizing ultra-wideband communications. In this paper, we propose the timing with dirty template (TDT) approach as a promising candidate for achieving rapid, accurate and low-complexity acquisition. We describe the dirty template (DT) technique, in order to develop and test timing algorithms in both modes: data-aided (DA) and non-data- aided (NDA) modes. First, we derive the Cramer鈥揜ao lower bound, which is used as a fundamental performance limit for any timing estimator. Next, the TDT acquisition estimator is achieved by using the Maximum Likelihood concept. Then we propose a new method, based on Time-Hoping codes, to improve the performance estimation of the original dirty template algorithms. Simulation shows the estimation error results of the modified method in the DA and NDA modes. It confirms the high performance and fast timing acquisition of DA mode, compared with NDA mode, but with less bandwidth efficiency.