Range Estimation in a Time Varying Multipath Channel

  • Authors:
  • Donglin Wang;Michel Fattouche

  • Affiliations:
  • Department of Electrical and Computer Engineering, University of Calgary, Calgary, Canada T2N 1N4 and Green Radio And Signal Processing (GRASP) Group, ECE Department, New York Institute of Technol ...;Department of Electrical and Computer Engineering, University of Calgary, Calgary, Canada T2N 1N4

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2013

Quantified Score

Hi-index 0.00

Visualization

Abstract

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.