This dissertation presents interference cancellation techniques for both the Forward Error
Correction (FEC) coded and the uncoded Direct Sequence Code Division Multiple
Access (DS-CDMA) systems. Analytical models are also developed for the adaptive and
the non-adaptive Parallel Interference Cancellation (PlC) receivers. Results that are
obtained from the computer simulations of the PlC receiver types confirm the accuracy of
the analytical models that are developed. Results show that the Least Mean Square
(LMS) algorithm based adaptive PlC receivers have bit error rate performances that are
better than those of the non-adaptive PlC receivers.
In the second part of this dissertation, a novel iterative multiuser detector for the Turbo
coded DS-CDMA system is developed. The performance of the proposed receiver in the
multirate CDMA system is also investigated. The developed receiver is found to have an
error rate performance that is very close to the single user limit after a few numbers of
iterations. The receiver is also resilient against the near-far effect. A methodology is also
presented on the use of the Gaussian approximation method in the convergence analysis
of iterative interference cancellation receivers for turbo coded DS-CDMA systems. / Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2004.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:ukzn/oai:http://researchspace.ukzn.ac.za:10413/3974 |
| Date | January 2004 |
| Creators | Bejide, Emmanuel Oluremi. |
| Contributors | Takawira, Fambirai. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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