Effective scheme of channel tracking and estimation for mobile WiMAX DL-PUSC system

  • Authors:

  • Phuong Thi Thu Pham;Tomohisa Wada

  • Affiliations:

  • Information Engineering Department, Graduate School of Engineering and Science, University of The Ryukyus, Nishihara, Okinawa, Japan;Information Engineering Department, Graduate School of Engineering and Science, University of The Ryukyus, Nishihara, Okinawa, Japan and Magna Design Net, Inc., Naha-city, Okinawa, Japan

  • Venue:
  • Journal of Computer Systems, Networks, and Communications - Special issue on WiMAX, LTE, and WiFi interworking
  • Year:
  • 2010

Quantified Score

Hi-index 0.00

Visualization

Abstract

This paper introduces an effective joint scheme of channel estimation and tracking for downlink partial usage of subchannel (DL-PUSC) mode of mobile WiMAX system. Based on the pilot pattern of this particular system, some channel estimation methods including conventional interpolations and a more favorable least-squares line fitting (LSLF) technique are comparatively studied. Besides, channel estimation performance can be remarkably improved by taking advantage of channel tracking derived from the preamble symbol. System performances in terms of packet error rate (PER) and user link throughput are investigated in various channels adopted from the well-known ITU models for mobile environments. Simulation results show a significant performance enhancement when the proposed joint scheme is utilized, at least 5 dB, compared to only commonly used channel estimation approaches.