OFDM Based PHY Performance of IEEE 802.11a using Various Practical Channel Models
Narendra Giradkar1, G. M. Asutkar2, Abhijit Maidamwar3

1Narendra Giradkar, Department of Electronics, Nagpur University, Smt Radhikatai Pandav College of Engg., Nagpur, India.
2Dr. G. M. Asutkar, Electronics Department, Nagpur University, PITCE, Nagpur, India.
3Abhijit Maidamwar, Electronics & Telecom, Nagpur University, NYSSCE, Nagpur, India.
Manuscript received on August 12, 2011. | Revised Manuscript received on August 17, 2011. | Manuscript published on September 05, 2011. | PP: 92-97 | Volume-1 Issue-4, September 2011. | Retrieval Number: D093071411/2011©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Today with the advent of wireless communication and need for greater bandwidth and speed requirement with noise free reception, research has opened up a whole new market for wireless solutions. The IEEE 802.11a standards using orthogonal frequency division multiplexing (OFDM) can provide data rates up to 54 Mbps which makes good for high speed communications in wireless local area networks. In this paper, We evaluated the OFDM based PHY performance of IEEE 802.11a using various practical channel models such as Rician Fading, Rayleigh multipath Fading & AWGN. The effects of different transmission modes define in PHY on IEEE 802.11a system performance are studied using MATLAB SIMULINK. The performance is characterized in terms of 802.11a receivers bit error rates and signal to noise ratio for various modulation schemes such as 16 QAM, 64 QAM, BPSK and QPSK for different code rates as defined by the IEEE Standards 802.11a. All the Simulink models were studied using convolutional coder and Viterbi Decoder and standard OFDM format with 48 carriers, 4 pilots and a zero insertion in the middle.
Keywords: OFDM, wireless network; 802.11.