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Performance Evaluation of the 802.16e Uplink in mobile fading channels
by R. Manishankar, Panagiotis Dallas, G. Karachalios, Gregory Yovanof
12th International Workshop on Systems, Signals and Image Processing (IWSSIP), Vol. 1, No. 1, 2005
Abstract: This paper presents the results of an end to end performance evaluation of broadband wireless access systems in mobile fading channels. A model of an OFDM system that has been proposed for broadband wireless access in the context of the IEEE 802.16e group is used to study the performance of the up-link functionality when the user mobility varies from the pedestrian speed of 3 km/hr up to vehicular speeds of 150 km/hr. The effect of mobile fading is modeled after the UMTS Channel A. In order to mitigate the effects of the broadband fading channel, a concatenated FEC scheme comprising of an RS block code and a Convolutional code is employed in the baseband system. An equalizer is used in the receiver to compensate for the channel effects using a Least-Squares channel estimator. Bit Error Rate (BER) and Error Vector Magnitude (EVM) analyses are done for QPSK and 16-QAM modulations with different coding rates and for mobile channels operating in the above vehicular environments.
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