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Implementation of Code Division Multiple Access using Asynchronous Sequential Techniques

International Journal of Computer Applications
© 2012 by IJCA Journal
Volume 47 - Number 9
Year of Publication: 2012
Mukhtar Ahmad Wani
M M Mushtaq
Roohie Naaz Mir

Mukhtar Ahmad Wani, M M Mushtaq and Roohie Naaz Mir. Article: Implementation of Code Division Multiple Access using Asynchronous Sequential Techniques. International Journal of Computer Applications 47(9):7-11, June 2012. Full text available. BibTeX

	author = {Mukhtar Ahmad Wani and M M Mushtaq and Roohie Naaz Mir},
	title = {Article: Implementation of Code Division Multiple Access using Asynchronous Sequential Techniques},
	journal = {International Journal of Computer Applications},
	year = {2012},
	volume = {47},
	number = {9},
	pages = {7-11},
	month = {June},
	note = {Full text available}


Digital Code Division Multiple Access (CDMA) scheme allows many users to transmit and receive at the same time using a single channel. CDMA techniques can use synchronous or asynchronous mechanisms. The work in this paper uses the less studied asynchronous mechanism. The transmitter and receiver are synchronized with the help of a delay element. The simulation and synthesis carried out using VHDL tool shows minimum power consumption and an increase in the overall speed of the system.


  • Duel-Hallen, A. , "A Family of Multiuser Decision-Feedback Detectors for Asynchronous Code Division Multiple Access Channels," To appear in IEEE Trans. On Commun. , Feb. 1995.
  • Duel-Hallen, A. , Holtzman, J. , and Zvonar, Z. , "Multiuser Detection for CDMA Systems," IEEE Personal Commun. , April 1995, pp. 4-8.
  • Kumar, V. , Srinivas, M. B. , "Design of a Digital CDMA Receiver " VLSI and Embedded Systems Research center: International Institute of Information Technology, Hyderabad India, pp. 587-588.
  • Mano, M. M. , "Digital Design" California State University, Los Angeles 2005, pp. 342-343
  • Moshavi, S. , "Multiuser Detection for DS-CDMA Communications," IEEE Commun. Mag. , Oct. 1996, pp. 12-36.
  • Pedroni, V. A. , "Circuit Design with VHDL," Prentice Hall of India [PHI] Private Limited 2005, pp. 152.
  • Prokais, J. G. , Salehi, M. , Bauch, G. , "Contemporary Communication Systems using MATLAB and Simulink," THOMSON Books/COLE.
  • Stallings, W. , "Wireless Communicatio-ns and Networks," Pearson Edition Asia 2002, Second Edition, pp. 183-185.
  • Tantaratana, S. , Ahmed, K. M. , "Wireless Applications of Spread Spectrum Systems," IEEE Networking the World 1998.
  • Tantaratana, W, H. , Shanmugan, K. S. , Rappaport, T, S. , and Kosbar K. L. , "Principles of Communication Systems Simulation with Wireless Applications," Pearson Education 2004.
  • Varanasi, M. K. , and Aazhang, B. , "Multistage Detection in Asynchronous Code Division Multiple Access Communications," IEEE Trans. On Commun. , Vol. COM-38, No. 4, April 1990, pp. 509-519.
  • Verdu, S. , "Minimum Probability of Error for Asynchronous Gaussian Multiple Access," IEEE Trans. on IT. , Vol. IT-32, No. 1, Jan. 1986, pp. 85-96.
  • Viterbi, A. J. , "CDMA Principles of Spread-Spectrum Communications", Reading, Mass. : Addison-Wesley Publishing Company, 1995.
  • Viterbi, A. J. , "Wireless Digital Communications: A View Based on Three Lessons Leaned," IEEE Communications Magazine, Vol. 29, No. 9. Sept. 1991.