计算机工程与应用Issue(10)：211-215,5.DOI:10.3778/j.issn.1002-8331.1109-0369
脉冲超宽带系统中高精度的双门限TOA估计
High-accuracy double-threshold TOA estimation in impulse-radio ultra wideband systems
摘要
Abstract
Aimming to improve the accuracy of ultra-wideband positioning under Non-Line-Of-Sight(NLOS)environment, a non-coherent TOA scheme is proposed by jointing double-threshold and slope estimations. By Direct Path(DP)search initially, the optimal normalized threshold fitting based on the slope of the maximum and minimum energy sample is obtained. Furthermore, double-threshold TOA estimation is adopted and improved by using the characteristics of double-exponent channel model. The Mean-Absolute Error(MAE)of the proposed algorithm is compared with other IR-UWB TOA estimations under NLOS environ-ment. Simulations verify the outstanding performance of this scheme in different UWB channels and SNR environments.关键词
非视距脉冲超宽带(IR-UWB)/双门限算法/双指数信道模型/TOA估计Key words
Ultra Wide Band Impulse Radio(IR-UWB)/double-threshold algorithm/double-exponent channel model/Time of Arrival(TOA)estimation分类
信息技术与安全科学引用本文复制引用
夏珺,郑霖,王玫..脉冲超宽带系统中高精度的双门限TOA估计[J].计算机工程与应用,2013,(10):211-215,5.基金项目
国家自然科学基金（No.60962001，No.61172054）；广西自然科学基金（No.0991018z）。 （）
