Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
An improved ranging algorithm for ad-hoc relay networks over IEEE 802.16 OFDMA systems
IEEE Communications Letters
A low complexity method of initial ranging for IEEE 802.16e OFDMA systems
ICACT'09 Proceedings of the 11th international conference on Advanced Communication Technology - Volume 2
A new CDMA-based bandwidth request method for IEEE 802.16 OFDMA/TDD systems
IEEE Communications Letters
An efficient negative acknowledgment method for CDMA-based ranging in IEEE 802.16 OFDMA systems
IEEE Communications Letters
Latency and Dropping Rate Analysis of IEEE 802.16e Handover
Wireless Personal Communications: An International Journal
An enhanced ranging algorithm for fixed wireless communication system
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication
Wireless Personal Communications: An International Journal
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In this paper, ranging process in IEEE 802.16e OFDMA systems is analyzed and performance is evaluated. Ranging process provides initial network entry, uplink synchronization, and system coordination. In the system initialization state, multiple users transmit randomly selected ranging code set and BS conducts multiple user identification by ranging code identification and uplink synchronization by transmission delay estimation. Ranging detection is based on peak detection exploiting the cross-correlation property of ranging code. However, the cross-correlation property is prone to be affected by channel characteristics and interference in the multipath fading channel. This paper analyzed the performance of ranging process in the multipath fading channel with 6 practical channel models and investigated the effect of channel characteristics and SNR. For the probabilistic analysis, PDF of ranging signal is also induced using Rayleigh approximation. Metrics of the performance evaluation consider both PHY and MAC layer. Simulations are conducted concerning various factors such as multipath profiles, ranging detection miss and error thresholds, cyclic prefix duration, and MAC layer parameters. The results of will give a thorough understanding on ranging process. Index Terms IEEE 802.16e, Ranging, Wireless Access, OFDMA