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IEICE TRANSACTIONS on Fundamentals

Pilot Tone Design with Low Peak-to-Average Power Ratio in OFDM

Shinji HOSOKAWA, Kok ann Donny TEO, Shuichi OHNO, Takao HINAMOTO

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Summary :

In Orthogonal Frequency Division Multiplexing (OFDM), the composite time signal exhibits a high peak-to-average power ratio (PAPR). Due to non-linearities of the transmit power amplifiers, this high PAPR generates in-band distortion, out of band noise (OBN) or spectral spreading, which degrades the bit-error rate (BER) performance. In this paper, we propose a simple way to combat this problem without sacrificing channel estimation and frequency-offset tracking accuracy, by designing a sub-optimal configuration of the pilot tones. The effectiveness of the newly designed pilot tones in reducing PAPR is validated by Monte-Carlo simulations. The corresponding improvement in BER is also verified by simulations under IEEE 802.11a standard settings, by using the channel with perfect CSI and the designed pilot-aided estimated channel for coherent detection.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E88-A No.8 pp.2117-2123
Publication Date
2005/08/01
Publicized
Online ISSN
DOI
10.1093/ietfec/e88-a.8.2117
Type of Manuscript
Special Section PAPER (Special Section on Papers Selected from the 19th Symposium on Signal Processing)
Category
Communication Theory and Signals

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