Analysis Of 802.16d By Irfan Anees

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Analysis of 802.16d by Irfan Anees

Analysis of 802.16d by Irfan Anees

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  • 1. "Glory to Thee: of knowledge we have none, save what Thou hast taught us: in truth it is Thou Who art perfect in knowledge and wisdom." Verse: 32
  • 2.
    • Muhammad Irfan
    • Department of Electronics Engineering, Sir Syed University Of Engineering & Technology, Karachi, Pakistan.
    • E-mail: [email_address]
    • Analysis of 802.16d Standard in Wimax using 256 sub carriers through OFDM Technique
  • 3. OUTLINE
    • Abstract
    • WIMAX
    • OFDM technology
    • Simulation Results
    • Conclusion
  • 4. ABSTRACT
    • The need for inexpensive and flexible commercial deployment of WiMAX technology has driven the requirement for multiple user access under non-line-of-sight (NLOS) operation and over distances up to 30 km.
    • The 802.16 specifications define three different PHYs optimized for different wireless operation and conditions.
    • These include a single-carrier modulation, a 256-carrier orthogonal frequency division multiplexing (OFDM) format and a 2048-carrier OFDM format.
    • The current industry focuses on the 256-carrier OFDM format. Fixed 802.16d WiMAX enables carriers to extend there services to un served areas as an alternative to DSL.
    • For this purpose we generate and analyze 802.16d standard Worldwide Interoperability for Microwave Access using 256 sub carriers through OFDM technique.
  • 5. Introduction to WiMAX
    • WiMAX (Worldwide Interoperability for microwave access)
    • A technology based on an evolving standard for point-to-multi point wireless networking
    • The commercialization of IEEE 802.16 standard
    • Solution for Wireless Metropolitan Area Network
  • 6.  
  • 7. WiMAX Features
    • Scalability
    • Range
    • Coverage
  • 8.  
  • 9. SIMULATION EQUATIONS 1. SIGNAL CHARACTERISTICS 2. SIGNAL LOSSES 3. SIGNAL GENERATION 4. TRANSMITTED SIGNAL 5. RECEIVED SIGNAL Where,
  • 10. Simulation of Signal Characteristics of an OFDM signal with respect to time. Parameters Values N 256 K 0-255 5 50Hz t 0-64 S No. Time Signal Generated 1 10 -0.6767 2 30 -0.6765 3 50 -0.6764
  • 11. Simulation of Signal Loss of an OFDM signal versus number of subcarriers. Parameters Values N 0-256 T S.No. Time Loss 1 10 0.5db 2 30 0.97db 3 50 0.99db 4 100 1db
  • 12. Simulation of the signal generation graph verses the sampling factor . Parameters Values N 256 k 0-255 10 n 0-511 2 S.No. Sampling Factor Amplitude 1 0 ± 5 2 100 ± 2.5 3 200 ± 3 4 300 ± 4.3
  • 13. Simulation of the transmitted signal with respect to time Parameter Value N 64 n 63 fc 5GHz ∆ f 4880 T 0.0000032 S No. Time Transmitted Signal 1 10 559.0179 2 30 559.0177 3 50 559.175
  • 14. Simulation of the receiving signal with respect to time Parameters Values T s t 0-64 5GHz 0.25 64 S No. Time Received Signal 1 10 1.52082 2 20 1.52085 3 30 1.5212 4 40 1.5121 5 50 1.52125 6 60 1.52145
  • 15.
    • WiMAX has selected to specify OFDM with 256 FFT for the 802.16d physical layer and not OFDMA with 2048 FFT.
    • The results from the simulations shows the advantage which are the maximum achievable bandwidth but using 256 sub carriers limits the bandwidth.
    Conclusion
  • 16.
    • References
    •  
    • [1] Atul Salvekar, Qinghua Li, Minh-Anh Vuong, Xiaoshu Qian and Sumeet Sandhu , “Multiple-Antenna Technology in WiMAX Systems”, Intel® Technology Journal, Volume 08, pp. 249, Aug. 2004.
    • [2] P. Ödling, P.O. Börjesson,"Orthogonal Frequency- Division Multiplexing (OFDM)", Luleå University of Technology. Division of Signal Processing, SE -222 40, pp. 5-6,2002.
    • [3] J.J.van de Beek , S.K. Wilson," Orthogonal Frequency- Division Multiplexing (OFDM) ", Department Of Applied Electronics SE - 222 40 Lund, Sweden , SE-
    • 971 87, pp. 9-11, 2002.
    • [4] Yao Xiao , “Orthogonal Frequency Division Multiplexing Modulation and Inter-Carrier Interference Cancellation”, Submitted to the Graduate Faculty of the
    • Louisiana State University and Agricultural and Mechanical College, pp. 9-27, May 2003.
    • [5] Motorola,"WiMAX: E vs. D The Advantages of 802.16e over 802.16d",MOTOROLA and the Stylized M Logo are registered,2005,pp 4-5
    • [6] Agilent WiMAX Signal Analysis,"Troubleshooting Symbols and Improving Demodulation Application Note",Agilent Technologies, Inc. 2005,pp 3-4
  • 17. Questions ?