Volume & Issue no: Volume 3, Issue 4, July - August 2014
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Title: |
PAPR Reduction in OFDM System using QPSK Modulation and Companding Technique |
Author Name: |
Dr. Vandana. B. Malode, Ms.Pratibha P. Patil |
Abstract: |
Abstract
Orthogonal Frequency Division Multiplexing (OFDM) is a
spectrally efficient multicarrier modulation technique for
high speed data transmission over multipath fading channels.
One of the main issues of OFDM is high Peak-to-Average
Power Ratio (PAPR) of the transmitted signal which
adversely affects the complexity of power amplifiers. A-Law
Companding method is also used in digital file formats and
telephony systems for better signal-to-noise ratio (SNR) at
lower bit rates. In this paper, Companding technique method
is proposed to reduce peak-to-average of OFDM signal.
Simulation results show that the proposed scheme may obtain
significant PAPR reduction while maintaining good
performance in the companding method. In this model this
problem can be overcome by using the A-Law Companding
Technique. By plotting the graph between BER and SNR it
can be prove that this model is efficient.
Keyword :-OFDM, PAPR, BER, Companding, Simulink. |
Cite this article: |
Dr. Vandana. B. Malode, Ms.Pratibha P. Patil , "
PAPR Reduction in OFDM System using QPSK Modulation and Companding Technique " , International Journal of Emerging Trends & Technology in Computer Science (IJETTCS) ,
Volume 3, Issue 4, July - August 2014 , pp.
281-284 , ISSN 2278-6856.
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