基于最大自相关及最小能量比的MB-OFDM-UWB系统定时算法

戈立军; 赵迎新; 吴虹; 金宇昂

doi:10.3724/SP.J.1146.2009.01385

基于最大自相关及最小能量比的MB-OFDM-UWB系统定时算法

doi: 10.3724/SP.J.1146.2009.01385

基金项目:

国家自然科学基金(60872026)和天津市应用基础及前沿技术研究计划重点项目(09JCZDJC16900)资助课题

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出版历程
- 收稿日期: 2009-10-26
- 修回日期: 2010-06-18
- 刊出日期: 2010-10-19

Timing Algorithm Based on Maximum Autocorrelation and Minimum Energy Ratio for MB-OFDM-UWB Systems

摘要

摘要: 该文针对IEEE 802.15.3a提案及ECMA-368标准采用的多频带OFDM超宽带系统，通过算法改进和仿真给出了适用于该系统的定时同步的完整方案。用基于前导序列第1频带信息的最大自相关法进行帧检测及粗定时，用基于全部3个频带信息的最小能量比值法进行细定时。对定时位置两次进行修正，保证了算法的性能。仿真表明该定时同步方案可以把残余定时偏差控制在较小的范围内，从而可以被频域信道估计及均衡吸收，同时该方案具有较低的复杂度。
- 无线通信 /
- 多频带正交频分复用 /
- 超宽带 /
- 同步 /
- 定时偏差 /
- 均方根误差
Abstract: This paper presents an intact scheme of timing synchronization for the Multi-Band OFDM (MB-OFDM) Ultra Wide Band (UWB) system adopted by IEEE 802.15.3a proposal and ECMA-368 standard. The scheme is determined through algorithm improvement and simulation. Frame detection and coarse timing are implemented with the Maximum Correlation (MC) method based on the first-band information of the preamble. Fine timing is achieved with the minimum energy ratio method based on the information of all the three bands. Besides, revision of the timing position is performed twice that performance of the algorithm is guaranteed. Simulations show that residual timing error can be kept at a small scale which can be compensated with channel in frequency domain. And else, the scheme has a low complexity.
- Wireless communication /
- Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) /
- Ultra Wide Band (UWB) /
- Synchronization /
- Timing error /
- Mean square root error

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参考文献(1)

[1] [1] IEEE Std. Multi-band OFDM physical layer proposal for IEEE 802.15 Task Group 3a[S]. 2004. [2] [2] ECMA Std. High rate ultra wideband PHY and MAC standard[S]. 2005. [3] 李平，赵志辉，张振仁. OFDM系统建模仿真及同步偏差分析[J].系统仿真学报.2007, 19(13):3042-3046 Li Ping, Zhao Zhi-hui, and Zhang Zhen-ren. Simulation of OFDM system model and synchronization errors analysis[J]. Journal of System Simulation, 2007, 19(13): 3042-3046. [4] Wang Yue and Dong Xiao-dai. Comparison of frequency offset and timing offset effects on the performance of SC-FDE and OFDM over UWB channels[J].IEEE Transactions on Vehicular Technology.2009, 58(1):242-250 [5] Minn H, Bhargava V, and Letaief K. A robust timing and frequency synchronization for OFDM systems[J]. IEEE Transactions on Wireless Communications, 2003, 2(4): 822-839. [6] Minn H, Bhargava V, and Letaief K. A combined timing and frequency synchronization and channel estimation for OFDM[J].IEEE Transactions on Communications.2006, 54(3):1081-1096 [7] Berger C R, Zhou Sheng-li, and Tian Zhi, et al.. Performance analysis on an MAP fine timing algorithm in UWB Multiband OFDM[J].IEEE Transactions on Communications.2008, 56(10):1606-1611 [8] 李长青，刘丹谱，乐光斯. UWB-OFDM系统的符号盲同步方法[J].电子与信息学报.2007, 29(8):1895-1899浏览 Li Chang-qing, Liu Dan-pu, and Yue Guang-xin. A robust blind symbol-timing synchronization for UWB-OFDM systems[J].Journal of Electronics Information Technology.2007, 29(8):1895-1899 [9] Li Y, Minn H, and Rajatheva R M A P. Synchronization, channel estimation, and equalization in MB-OFDM Systems[J].IEEE Transactions on Wireless Communications.2008, 7(11):4341-4352 [10] Muquet B, Wang Z, and Giannakis G, et al.. Cyclic prefixing or zero padding for wireless multicarrier transmisions?[J].IEEE Transactions on Communications.2002, 50(12):2136-2148

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