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Asymptotic Equivalence of Two Multicarrier Transmission Schemes in Terms of Robustness Against Time-Frequency Dispersive Channels.
- Source :
-
IEEE Transactions on Vehicular Technology . Feb2010, Vol. 59 Issue 2, p682-691. 10p. 6 Graphs. - Publication Year :
- 2010
-
Abstract
- Digital signal transmission can be viewed as latticetiling over a time-frequency plane. Corresponding to a rectangular lattice and a hexagonal lattice, there are two multicarrier transmission schemes, i.e., the Weyl-Heisenberg (W-H) system and the hexagonal Gabor (H-G) system, respectively. In the previous works, the transmission pulse shape and the time-frequency lattice parameters of the above two systems were optimized to obtain the best robustness against time-frequency dispersive channels. In this paper, by virtue of elliptic integral theory, we theoretically prove that the optimized W-H system and H-G system are asymptotically equivalent to each other in the sense of achieving the same energy perturbation as signaling efficiency approaches 0 or +8. Moreover, it is shown that, for moderate signaling efficiencies, the superiority of the H-G system over the W-H system is virtually limited. Numerical results are provided to support the theoretical analysis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189545
- Volume :
- 59
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Vehicular Technology
- Publication Type :
- Academic Journal
- Accession number :
- 48612267
- Full Text :
- https://doi.org/10.1109/TVT.2009.2037234