PAPR Reduction in MIMO OFDM System using Modified SLM based Constant Modulus Algorithm with IDCT Matrix

Recent advances in wireless communication systems have increased the throughput over wireless channels and networks. In 3G, Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system have been proposed for providing high data rate services over wireless channels. Ho...

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Bibliographic Details
Published in:International journal of computer science and information security 2016-05, Vol.14 (5), p.588-588
Main Authors: Sujatha, S, Dananjayan, P
Format: Article
Language:English
Subjects:
Algorithms
Antennas
Channels
Computer simulation
Distortion
Efficiency
Fourier transforms
Networks
Orthogonal Frequency Division Multiplexing
Reduction
Transmitters
Wireless communication
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Summary:Recent advances in wireless communication systems have increased the throughput over wireless channels and networks. In 3G, Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system have been proposed for providing high data rate services over wireless channels. However, the MIMO-OFDM system provides high peak to average power ratio (PAPR) when compared to the single carrier system and it is one of the most detrimental aspects of the OFDM system. The PAPR problem is more important in the uplink since the efficiency of the power amplifier is critical due to the limited battery power. to reduce PAPR, many techniques (distortion and distortionless techniques) are proposed in the literature. In this paper a modified selective level mapping (SLM) technique based Constant Modulus Algorithm (CMA) with Inverse Discrete Cosine Transform (IDCT) matrix is used to reduce the PAPR. It involves two methods such as steepest decent CMA and unit circle constant modulus algorithm to reduce the PAPR further in MIMO-OFDM. The simulation result shows that there is a significant improvement in PAPR performance of MIMO-OFDM system.
ISSN:1947-5500