Paper Info
Title
A new ZCT precoded OFDM system with pulse shaping: PAPR analysis
Abstract
This paper studies the Peak to Average Power Ratio (PAPR) improvements in various precoding based Orthogonal Frequency Division Multiplexing (OFDM) systems. In particular, the Zadoff-Chu matrix Transform (ZCT) precoder based PAPR reduction technique is analyzed. The ZCTs are obtained from Zadoff-Chu (ZC) sequences by filling ZCT kernel row-wise or alternatively column wise. Row wise filling gives rise to Constant Envelope OFDM (CE-OFDM) system with 0 dB PAPR, while column wise filling give rise 7.8 dB, at clip rate of 10-3 with system subcarriers N = 64 for QPSK modulation. However, since even CE-OFDM systems are required to operate with pulse shaping that helps in keeping out-of-band radiation low and meeting the transmission spectrum mask requirement, the PAPRs are no longer 0 dB. Therefore, in this paper, we present PAPR analysis of various precoding based OFDM systems with the popular Root Raised Cosine (RRC) pulse shaping. Simulation results show that, the ZCT Row-wise precoder based OFDM (ZCT-R-OFDM) system has lower PAPR than the ZCT Column-wise precoder based OFDM (ZCT-C-OFDM) system, the Hadamard Transform precoder based OFDM (WHT-OFDM) systems and the conventional OFDM systems.
Year
DOI
Venue
2010
10.1109/APCCAS.2010.5775063
Circuits and Systems
Keywords
Field
DocType
OFDM modulation,phase shift keying,precoding,pulse shaping,transforms,Hadamard transform precoder based OFDM systems,PAPR analysis,PAPR reduction technique,QPSK modulation,ZCT column-wise precoder based OFDM system,ZCT precoded OFDM system,ZCT row-wise precoder based OFDM system,Zadoff-Chu matrix Transform precoder,constant envelope OFDM,othogonal frequency division multiplexing,peak to average power ratio,precoding,root raised cosine pulse shaping,transmission spectrum mask requirement,OFDM conventional,Peak to Average Power Ratio (PAPR),ZCT-C-OFDM system,ZCT-R-OFDM system,Zadoff-Chu matrix Transform (ZCT)
Kernel (linear algebra),Raised-cosine filter,Control theory,Computer science,Electronic engineering,Modulation,Pulse shaping,Hadamard transform,Precoding,Orthogonal frequency-division multiplexing,Phase-shift keying
Conference
ISBN
Citations 
PageRank 
978-1-4244-7454-7
1
0.37
References 
Authors
4
2
Name
Order
Citations
PageRank
Imran Baig1366.56
Varun Jeoti24611.34