Performance analysis of CDMA under Rayleigh Rician and Nakagami fading channels

  • Mahadev Mahajan
  • D. B. Bhoyar
Conference paper


CDMA uses unique spreading codes to spread the baseband data before transmission. The signal is transmitted in a channel, which is below noise level. The receiver then uses a correlate to dispread the wanted signal, which is passed through a narrow band pass filter. Unwanted signals will not be dispread and will not pass through the filter. Codes take the form of a carefully designed one/zero sequence produced at a much higher rate than that of the baseband data. The rate of a spreading code is referred to as chip rate rather than bit rate Channel fading is characterized by the fl uctuations of channel coefficient ck for each user k. Despite the fact that channel fading was traditionally viewed as a source of error and unreliability that is undesirable, the fading is employed as a requirement for throughput maximization in multi-user diversity. This is accomplished by tracking the instantaneous channel quality of the users in the system and schedule transmissions to the user who has the best channel quality at any given time.


Fading Channel Rayleigh Fading Channel Spreading Code Multiple Access Interference Nakagami Fading Channel 
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  1. 1.
    Mathematical Modeling of Rayleigh Fading channels based on Markov Chains Jae Man Park and Gang Uk HwangGoogle Scholar
  2. 2.
    Accurate berofmc-ds-cdmaover rayleig fading channels besma smidaGoogle Scholar
  3. 3.
    Y. Ma, T. L. Lim, and S. Pasupathy, “Error probability for coherent and deferential PSK over arbitrary Rician fading channels with multiple co channel interferers,” IEEE Trans.Communications, vol. 50, no. 3, pp. 429–441, 2002CrossRefGoogle Scholar
  4. 4.
    E. Biglieri, G. Caire, G. Taricco, and J. Ventura-Traveset, “Simple method for evaluating error probabilities,” Electronics Letters, vol. 32, no. 3, pp. 191–192, 1996CrossRefGoogle Scholar
  5. 5.
    On the Capacity-Achieving Distribution of the Noncoherent Rician Fading Channel1 Mustafa C. Gursoy, H. Vincent Poor,and Sergio VerduGoogle Scholar
  6. 6.
    Mathematical Modeling of Rayleigh Fading channels based on Markov Chains Jae Man Park and Gang Uk HwangGoogle Scholar
  7. 7.
    Performance of Modified Orthogonal Space-Time Block Codes des in Nakagami Fading Channels Gabriel Porto orto Villardi Giusepp Giuseppe T. F. de Abreu Ryuji KohnoGoogle Scholar
  8. 8.
    Performance of Generalized Multicarrier DS-CDMA Over Nakagami-m Fading Channels Lie-Liang Yang, Member, IEEE, and Lajos Hanzo, Senior Member, IEEEGoogle Scholar
  9. 9.
    R. Prasad and S. Hara, “Overview of multicarrier CDMA,” IEEE Commun. Mag., pp. 126–133, Dec. 1997Google Scholar

Copyright information

© Springer India Pvt. Ltd 2011

Authors and Affiliations

  • Mahadev Mahajan
    • 1
  • D. B. Bhoyar
    • 1
  1. 1.Electonics Engineering Department Electronics Engineering DepartmentNagpurIndia

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