A critique study on phase optimized generalized discrete fourier transform based partial transmit sequence for PAPR in OFDM systems
Orthogonal Frequency Division Multiplexing (OFDM) is a revolutionary digital modulation technique which known as a next generation of wireless communication 5th Generation. OFDM supports high speed data rate and multi user technique where it can accommodate large number of users showing spectral e...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Asian Research Publishing Network (ARPN)
2015
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/46060/1/jeas_1115_3030.pdf http://irep.iium.edu.my/46060/ http://www.arpnjournals.com/jeas/index.htm |
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| Summary: | Orthogonal Frequency Division Multiplexing (OFDM) is a revolutionary digital modulation technique which
known as a next generation of wireless communication 5th Generation. OFDM supports high speed data rate and multi user
technique where it can accommodate large number of users showing spectral efficiency to meet the fast growing demands
for better throughput and quality of service. However, OFDM-time domain signal suffering from a large peak-to-average
power ratio PAPR .Fortunately several schemes have been proposed to reduce the problems of PAPR. One of the effective
methods is partial transmit sequence PTS with pseudo-random sub-blocks portioning as it has better PAPR performance.
Many techniques introduced to improve the performance of PTS scheme. In this paper a critique study on the use of phase
optimized from the theory of generalized discrete Fourier transform GDFT is carried out. this method, generates nonlinear
phase to OFDM sub blocks after taken of IFFT for each sub block, then the output phase is rotated by coefficients
depending on number of side information bits ‘m’ to produces minimum PAPR. Simulation results elaborate that phase
modification of OFDM frames before applying PTS that has achieved acceptable reduction in both complexity and PAPR. |
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