Modified TR Scheme with Low Complexity in Mobile WiMAX Systems

Soobum CHO  Sang Kyu PARK  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.3   pp.856-859
Publication Date: 2011/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.856
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
TR,  PAPR,  PRT,  OFDM,  

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Summary: 
Tone reservation (TR) is an efficient peak-to-average power ratio (PAPR) reduction scheme that adds peak reduction tones (PRTs) to the orthogonal frequency division multiplexing (OFDM) signal. However, enormous numbers of iterations are needed to find the optimal PRT set, which makes the TR scheme quite complex. In this letter, we propose a modified TR scheme that considerably reduces the computational complexity of the optimization process for the PRT set compared with the conventional TR scheme.