Analysis Of 802.16d By Irfan Anees

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Analysis of 802.16d by Irfan Anees

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Analysis Of 802.16d By Irfan Anees

  1. 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. 2. <ul><li>Muhammad Irfan </li></ul><ul><li>Department of Electronics Engineering, Sir Syed University Of Engineering & Technology, Karachi, Pakistan. </li></ul><ul><li>E-mail: [email_address] </li></ul><ul><li>Analysis of 802.16d Standard in Wimax using 256 sub carriers through OFDM Technique </li></ul>
  3. 3. OUTLINE <ul><li>Abstract </li></ul><ul><li>WIMAX </li></ul><ul><li>OFDM technology </li></ul><ul><li>Simulation Results </li></ul><ul><li>Conclusion </li></ul>
  4. 4. ABSTRACT <ul><li>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. </li></ul><ul><li>The 802.16 specifications define three different PHYs optimized for different wireless operation and conditions. </li></ul><ul><li>These include a single-carrier modulation, a 256-carrier orthogonal frequency division multiplexing (OFDM) format and a 2048-carrier OFDM format. </li></ul><ul><li>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. </li></ul><ul><li>For this purpose we generate and analyze 802.16d standard Worldwide Interoperability for Microwave Access using 256 sub carriers through OFDM technique. </li></ul>
  5. 5. Introduction to WiMAX <ul><li>WiMAX (Worldwide Interoperability for microwave access) </li></ul><ul><li>A technology based on an evolving standard for point-to-multi point wireless networking </li></ul><ul><li>The commercialization of IEEE 802.16 standard </li></ul><ul><li>Solution for Wireless Metropolitan Area Network </li></ul>
  6. 7. WiMAX Features <ul><li>Scalability </li></ul><ul><li>Range </li></ul><ul><li>Coverage </li></ul>
  7. 9. SIMULATION EQUATIONS 1. SIGNAL CHARACTERISTICS 2. SIGNAL LOSSES 3. SIGNAL GENERATION 4. TRANSMITTED SIGNAL 5. RECEIVED SIGNAL Where,
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 15. <ul><li>WiMAX has selected to specify OFDM with 256 FFT for the 802.16d physical layer and not OFDMA with 2048 FFT. </li></ul><ul><li>The results from the simulations shows the advantage which are the maximum achievable bandwidth but using 256 sub carriers limits the bandwidth. </li></ul>Conclusion
  14. 16. <ul><li>References </li></ul><ul><li>  </li></ul><ul><li>[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. </li></ul><ul><li>[2] P. Ödling, P.O. Börjesson,&quot;Orthogonal Frequency- Division Multiplexing (OFDM)&quot;, Luleå University of Technology. Division of Signal Processing, SE -222 40, pp. 5-6,2002. </li></ul><ul><li>[3] J.J.van de Beek , S.K. Wilson,&quot; Orthogonal Frequency- Division Multiplexing (OFDM) &quot;, Department Of Applied Electronics SE - 222 40 Lund, Sweden , SE- </li></ul><ul><li>971 87, pp. 9-11, 2002. </li></ul><ul><li>[4] Yao Xiao , “Orthogonal Frequency Division Multiplexing Modulation and Inter-Carrier Interference Cancellation”, Submitted to the Graduate Faculty of the </li></ul><ul><li>Louisiana State University and Agricultural and Mechanical College, pp. 9-27, May 2003. </li></ul><ul><li>[5] Motorola,&quot;WiMAX: E vs. D The Advantages of 802.16e over 802.16d&quot;,MOTOROLA and the Stylized M Logo are registered,2005,pp 4-5 </li></ul><ul><li>[6] Agilent WiMAX Signal Analysis,&quot;Troubleshooting Symbols and Improving Demodulation Application Note&quot;,Agilent Technologies, Inc. 2005,pp 3-4 </li></ul>
  15. 17. Questions ?

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