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On Trellis Shaping for PAR Reduction in OFDM Systems.

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Titel: On Trellis Shaping for PAR Reduction in OFDM Systems.
Autoren: Trung Thanh Nguyen, Lampe, Lutz
Quelle: IEEE Transactions on Communications; Sep2007, Vol. 55 Issue 9, p1678-1682, 5p, 1 Chart, 3 Graphs
Schlagwörter: TRELLIS-coded modulation, ELECTRONIC modulation, ORTHOGONAL frequency division multiplexing, DECODERS (Electronics), DECODERS & decoding, TELECOMMUNICATION systems, PULSE frequency modulation, ELECTRONIC systems
Abstract: The application of trellis shaping was recently proposed to reduce the peak-to-average power ratio (PAR) of orthogonal frequency division multiplexing (OFDM) signals. In this letter, we review the trellis-shaping schemes presented in the literature, and we introduce modifications such as a new decoding metric and the use of sequential decoding. We conduct comprehensive complexity and performance comparisons for the different schemes, and one interesting result of this work is that, in terms of PAR-reduction capability, trellis shaping with time-domain metrics is generally superior to trellis shaping with frequency-domain metrics. Furthermore, the proposed modifications enable trellis shaping for PAR reduction with a flexible performance-complexity tradeoff. [ABSTRACT FROM AUTHOR]
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Datenbank: Complementary Index
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