Anbar Journal for Engineering Sciences

Abstract

WMAN (wireless metropolitan area network) technology is based on the IEEE 802.16
air interface standard suite, which provides the wireless technology for fixed and
nomadic data access. WMAN employs orthogonal frequency division multiplexing
(OFDM), and supports adaptive modulation and coding depending on the channel
conditions. The objective of this paper is to study the performance of the IEEE 802.16d
WMAN physical layer under Nakagami model as a Multi-path and frequency-selective
fading channel beside the additive white Gaussian noise (AWGN) and Doppler. Finally,
we compared it with the Rayleigh fading model. The transmission bit rate, Probability
of Error ( ) and estimated SNR have been compared under single/multi path
propagation conditions.