Zadoff-Chu Matrix for Reduction of PAPR of Precoded OFDM

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) PAPR (Peak to Power Ratio) is one of the major drawbacks.  In  this  paper  we propose  a  study  of  PAPR  and  PAPR  reduction technique  using  ZCT.  The  Zadoff-Chu  Matrix transform  (ZCT)  is  one  type  of  technique  used  to reduce  the  PAPR  analyzed.  In  ZCT  (Zadoff-ChuMatrix  transform)  we  obtain  the  ZCT  sequences from  the  ZCT  kernel  row  wise  filling  which  gives rise  to  the  constant  Envelope  OFDM  (CE-OFDM) system  and  ZCT  sequences  form column wise  and the number of sub carriers used in  the  OFDM  is  N=64  with  QAM modulation. The  final simulation  results  show  the  ZCT  Row  wise precoder based OFDM (ZCT-R-OFDM) system has less  PAPR  than  the  ZCT  Column  wise  precoder based  OFDM  (ZCT-C-OFDM),  conventional OFDM.