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Paper Abstract and Keywords
Presentation 2017-10-16 16:15
[Poster Presentation] A Proposal for a New OFDM Wireless System using a CAZAC Equalization Scheme
Ryota Ishioka, Tomotaka Kimura, Masahiro Muraghchi (TUS)
Abstract (in Japanese) (See Japanese page) 
(in English) It is well known that one of the most serious drawbacks of the orthogonal frequency division multiplexing (OFDM) scheme in wireless applications is its high peak-to-average power ratio (PAPR), which decreases the efficiency of power amplifiers (PAs) and increases transmitter power consumption. We propose a constant amplitude zero auto-correlation (CAZAC) equalization scheme, which is a robust way of overcoming the PAPR problems with the OFDM scheme. CAZAC sequence has good auto-correlation, therefore synchronization signal in 3GPP LTE uses CAZAC sequence. The CAZAC equalization scheme makes the PAPR of multilevel quadrature amplitude modulation (MQAM) OFDM signals into the PAPR of M-QAM single-carrier signals. This paper proposes a new wireless system that introduced the CAZAC equalization scheme. CAZAC equalization improves the estimated power-added efficiency of the PAs for a 16-QAM OFDM system with 52 subcarriers from 17.8 to 25.2% because it reduces the PAPR of 2.5 dB, while the system imposes no penalties on the bit error rate (BER). The paper also provides theoretical analysis of CAZAC equalization and information on spectral control and the efficiency of BER under fading environments.
Keyword (in Japanese) (See Japanese page) 
(in English) OFDM / CAZAC sequence / Zadoff-Chu sequence / CAZAC-OFDM / PAE / / /  
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Conference Information
Committee CQ  
Conference Date 2017-10-16 - 2017-10-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Nishijin Plaza, Kyushu Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) The 4th Communication Quality Workshop 
Paper Information
Registration To CQ 
Conference Code 2017-10-CQ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Proposal for a New OFDM Wireless System using a CAZAC Equalization Scheme 
Sub Title (in English)  
Keyword(1) OFDM  
Keyword(2) CAZAC sequence  
Keyword(3) Zadoff-Chu sequence  
Keyword(4) CAZAC-OFDM  
Keyword(5) PAE  
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1st Author's Name Ryota Ishioka  
1st Author's Affiliation Tokyo University of Science (TUS)
2nd Author's Name Tomotaka Kimura  
2nd Author's Affiliation Tokyo University of Science (TUS)
3rd Author's Name Masahiro Muraghchi  
3rd Author's Affiliation Tokyo University of Science (TUS)
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Speaker Author-1 
Date Time 2017-10-16 16:15:00 
Presentation Time 60 minutes 
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