Effective Scheme of Channel Tracking and Estimation for Mobile WiMAX DL-PUSC System. (1st March 2010)

• Record Type: Journal Article
• Authors: Pham, Phuong Thi Thu; Wada, Tomohisa
• Other Names: Saeed Rashid Academic Editor.
• Is Part Of: Journal of computer systems, networks, and communications. Volume 2010(2010)
• Publication Date: 2010-03-01
• Subjects: Computer systems -- Periodicals; Computer networks -- Periodicals; Computer networks; Computer systems; Periodicals; Electronic journals; 004.605
• DOI: 10.1155/2010/806279
• Languages: English
• ISSNs: 1687-7381

Abstract

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.