Turbo codes have been used successfully for error correction in digital
communications, however, their application to wireless mobile
communications is still a fresh research topic. The objective of this thesis is
to present a new solution that involves the usage of turbo codes, spatial
diversity, and orthogonal complementary codes in a CDMA spread
spectrum system in order to deliver good performance in a fading
environment at low signal-to-noise ratios.
The results of the research that was performed to write this thesis
are presented in a modular and progressive fashion. That is, the design of a
basic turbo-coded system in additive white Gaussian noise (AWGN) is
developed first in order to get a good understanding of its potential in a
wireless communication environment. Then the basic system design is
expanded to include fading channel characteristics and multiple access
spread spectrum capabilities using classical code division multiple access
(CDMA) techniques. Finally, orthogonal complementary codes are used in
lieu of traditional spreading codes and spatial diversity is introduced to
maximize system performance. / Graduation date: 2003
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/31498 |
| Date | 04 November 2002 |
| Creators | Tjahjadi, Aldo |
| Contributors | Magana, Mario E. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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