Implementation of principal component analysis technique in peak to average power ratio
Loading...
Date
2018-06
Authors
Putri Nurzubaidah Haji Ahmad Tajudin
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Wireless communication has become one of the most rapid technology evolvements in
the world. Orthogonal Frequency Division Multiplexing (OFDM) has become the most
efficient multi carrier modulation technique for achieving high data rate transmission in
wireless communication. OFDM offers advantages such as immunity to selective fading,
spectrum efficiency, and various more. Regardless of these beneficial advantages, the
performance of OFDM is limited as Peak Power to Average Power Ratio (PAPR) is
significantly high. This would reduce the performance of Power Amplifier (PA).
Principle Component Analysis (PCA) technique is proposed to implement in the high
PAPR as it identifies the directions of most variation in the data set and it reduces the data
down into its basic component, dispossess any unnecessary parts. A novel framework
using Principal Component Analysis in PAPR is studied. A simple framework using
Covariance Matrix in Principal Component Analysis is developed in the PAPR. An
evaluation of the overall performances is made using the proposed Principal Component
Analysis scheme in PAPR in OFDM system. The project starts with initializing the
parameter used in the OFDM system. The input data is generated randomly. Next, serial
to parallel the subcarriers ready for the processing of IFFT. Then, the IFFT takes place.
After that, PCA technique save the largest eigenvector and eigenvalue. Lastly, the optimal
transmitted signal with the lowest PAPR is chosen. It has been observed from the obtained
results that PCA technique increased the value of PAPR even when it supressed the
amplitude of the signal. When implementing PCA technique with clipping, PAPR is
reduced significantly. It can be concluded that PCA technique alone do not reduced
PAPR, but when combining with other methods, notable PAPR reduction can be
achieved.