Adaptive modulation is widely employed to improve spectral e ciency. To date,
square signal constellations have been used for adaptive modulation. In this disser-
tation, triangular constellations are considered for this purpose. Triangle quadrature
amplitude modulation (TQAM) for both power-of-two and non-power-of-two mod-
ulation orders is examined. A technique for TQAM mapping is presented which is
better than existing approaches. A new type of TQAM called semi-regular TQAM
(S-TQAM) is introduced. Bit error rate expressions for TQAM are derived, and the
detection complexity of S-TQAM is compared with that of regular TQAM (R-TQAM)
and irregular TQAM (I-TQAM). The performance of S-TQAM over additive white
Gaussian noise and Rayleigh fading channels is compared with that of R-TQAM and
I-TQAM.
The construction of ternary convolutional codes (TCCs) for ternary phase shift
keying (TPSK) modulation is considered. Tables of non-recursive non-systematic
TCCs with maximum free distance are given for rates 1=2, 1=3 and 1=4. The conver-
sion from binary data to ternary symbols is investigated. The performance of TCCs
with binary to ternary conversion using TPSK is compared with the best BCCs using
binary phase shift keying (BPSK). / Graduate
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/8428 |
| Date | 16 August 2017 |
| Creators | Abdelaziz, Mahmoud Karem Mahmoud |
| Contributors | Gulliver, T. Aaron |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Format | application/pdf |
| Rights | Available to the World Wide Web |
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