Range Estimation in a Time Varying Multipath Channel

被引：0
作者：
Donglin Wang
Michel Fattouche
机构：
[1] University of Calgary,Department of Electrical and Computer Engineering
[2] New York Institute of Technology,Green Radio And Signal Processing (GRASP) Group, ECE Department
来源：
Wireless Personal Communications | 2013年 / 71卷
关键词：
Central angle range estimation; Time varying channel; Cramer-Rao lower bound (CRLB); Maximum likelihood estimator (MLE); Multipath Doppler; Pseudo-random noise (PN); Multicarrier (MC);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, range estimation in a time varying multipath channel is investigated, on the basis of which a multicarrier (MC) signal is compared with its pseudo-random (PN) counterpart in terms of the Cramer-Rao lower bound (CRLB) and the maximum likelihood estimator (MLE). The CRLB for range estimation in a time varying multipath channel is derived for three cases: (1) known channel state information (CSI); (2) unknown CSI; and (3) a special case of unknown CSI where the channel is modeled via Doppler shift. Furthermore, the MLE is developed for range estimation for each one of the above three cases and is investigated for a multipath Doppler channel with respect to the separability of its multipath components. Besides, the condition for a multipath Doppler channel to be separable is explored for a PN signal as well as for a MC signal. Simulation results show that range estimation with a MC signal outperforms its PN counterpart in a time varying channel, similar as that in a time invariant channel.
引用
收藏
页码：887 / 908
页数：21
相关论文
共 83 条
[1]  
Rappaport T.(1996)Position location using wireless communications on highways of the further IEEE Communications Magazine 34 33-41
[2]  
Reed J.(2006)Analysis of wireless geolocation in a non-line-of-sight environment IEEE Transactions on Wireless Communications 5 672-681
[3]  
Woerner B.(2002)Comparisons of error characteristics between TOA and TDOA positioning IEEE Transactions on Aerospace and Electronic Systems 38 307-311
[4]  
Qi Y.(2005)On the accuracy of signal strength-based estimation techniques IEEE INFOCOM 1 642-650
[5]  
Kobayashi H.(2002)Signal strength based indoor geolocation IEEE ICC 1 436-439
[6]  
Suda H.(2002)Maximum-likelihood source localization and unknown sensor location estimation for wideband signals in the near-field IEEE Transactions on Signal Processing 50 1843-1854
[7]  
Shin D.(2006)Average performance analysis of circular and hyperbolic geolocation IEEE Transactions on Vehicular Technology 55 52-66
[8]  
Sung T. K.(2008)Ranging in a single-input multiple-output (SIMO) system IEEE Communications Letters 12 197-199
[9]  
Krishnakumar A. S.(2001)Robust range estimation using acoustic and multimodal sensing IEEE/RSJ International Conference on Intelligent Robots and Systems 3 1312-1320
[10]  
Krishnan P.(2002)Location using LOS range estimation in NLOS environments IEEE VTC Spring 2002 856-860
123456789