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A Novel PAPR Reduction Method in OFDM Systems by Using CAZAC Matrix Transform

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3 Author(s)
Runhe Qiu ; Donghua Univ., Shanghai ; Zhongli Wu ; Shan Zhu

One of the major disadvantage of OFDM is the high peak-to-average power ratio (PAPR) of the transmitted OFDM signal. This paper proofed the autocorrelation properties of CAZAC sequence, and then proposed a new method to reduce the PAPR in OFDM systems based on CAZAC sequence by taking advantage of the low autocorrelation characteristics of CAZAC sequence .This scheme expands the conventional OFDM signal constellation points, and decreases relevance between the frequency symbols in order to reduces the PAPR of the OFDM system. Simulations results show that CAZAC transform can significantly reduce the PAPR of the transmitted signal and without loss of BER performance along with low-complexity and easy implementation.

Published in:

Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on

Date of Conference:

12-14 Oct. 2008

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