%V 57
%A I. Baig
%A V. Jeoti
%T A novel Zadoff-Chu matrix transform precoded interleaved-OFDMA uplink system for 4G cellular systems: Peak to average power ratio performance
%P 557-562
%K 4G cellular systems; Constant envelope; High power amplifier; Interleaved-orthogonal frequency division multiple access uplink; Matrix transforms; Orthogonal frequency division multiple access; Orthogonal frequency division multiple access systems; Out-of-band radiation; Peak to average power ratio; Power efficiency; Precoders; Precoding; Pulse-shaping; Radio frequencies; Root-raised cosines; Saturation levels; Transmission spectrums; Uplink systems; Walsh-Hadamard transform, Cellular arrays; Cellular telephone systems; Orthogonal frequency division multiplexing; Power amplifiers; Pulse shaping circuits, Frequency division multiple access
%X High Peak to Average Power Ratio (PAPR) is one of the major drawbacks in the Orthogonal Frequency Division Multiple Access (OFDMA) systems. In this paper, we present a novel Zadoff-Chu Matrix Transform (ZCMT) precoding based Interleaved-OFDMA uplink system with improved PAPR for the upcoming 4G cellular systems. The proposed system is based on the precoding of constellation symbols with ZCMT precoder in such a way that the system becomes Constant Envelope OFDMA (CE-OFDMA). The CE-OFDMA signal allows the Radio-Frequency (RF) high power amplifier to operate near its saturation levels, thus maximize the power efficiency. However, even 0 db PAPR or CE-OFDMA systems must contend with pulse shaping to keep out of band radiation low and to meet the transmission spectrum mask requirement. Hence, the PAPR is analyzed with Root Raised Cosine pulse shaping. Simulation results show that proposed system has better PAPR gain than the walsh-hadamard transform (WHT) precoded Interleaved-OFDMA uplink systems and the conventional Interleaved-OFDMA uplink systems.
%L scholars1844
%J IETE Journal of Research
%O cited By 9
%R 10.4103/0377-2063.92272
%N 6
%D 2011