An efficient initial ranging algorithm for WiMAX (802.16e) OFDMA

  • Authors:

  • Hisham A. Mahmoud;Huseyin Arslan;Mehmet Kemal Ozdemir

  • Affiliations:

  • Electrical Engineering Department, University of South Florida, 4202 E. Fowler Ave., ENB-118, Tampa, FL 33620, USA;Electrical Engineering Department, University of South Florida, 4202 E. Fowler Ave., ENB-118, Tampa, FL 33620, USA;Logus Broadband Wireless Solutions, 3803 Corporex Park Pl. Suite 700, Tampa, FL 33619, USA

  • Venue:
  • Computer Communications
  • Year:
  • 2009

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Abstract

Ranging is one of the most important processes in the mobile WiMAX standard. Power adjustment, timing offset estimation, and synchronization between a base station (BS) and all users within a cell are done through the ranging process referred to as initial ranging. In this paper, we discuss the details of initial ranging together with some of the proposed algorithms, as well as a novel algorithm to carry out a successful ranging process. Performance curves and computational complexity comparisons are presented. The system performance is evaluated for both additive white Gaussian noise (AWGN) channels and practical multipath fading channels with multiuser interference. It is shown that the proposed algorithm offers a reduced complexity ranging method that can be employed in practical WiMAX-based BSs.