Reduced Constraint Set Linear Program for Tone Reservation in Multicarrier Modulation

Abolfazl GHASSEMI  T. Aaron GULLIVER  

Publication
IEICE TRANSACTIONS on Communications   Vol.E92-B   No.6   pp.2231-2234
Publication Date: 2009/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2231
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
Keyword: 
multicarrier modulation,  peak-to-average power ratio (PAPR),  tone reservation (TR),  

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Summary: 
Tone reservation (TR) has been proposed for peak to average power reduction (PAPR) in real-baseband multicarrier systems [1]. In this technique, the peak reduction signal is computed by optimization via linear programming (LP). As shown in [1], the computational complexity of the LP optimization is largely determined by the complexity of the inverse fast Fourier transform (IFFT) algorithm. In this paper, we use submatrices of the inverse fast Fourier transform (IFFT) to reduce the number of constraints in the LP-based optimization. We show that a significant complexity reduction can be achieved compared to the conventional TR algorithm, with similar PAPR reduction.