Results 141 to 150 of about 1,857 (183)

Papr Reduction for Beamforming Ofdm Transmitters

2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings, 2006
A high peak-to-average-power ratio (PAPR) is a primary drawback of orthogonal frequency-division multiplexing (OFDM). Many methods have been proposed to reduce the OFDM PAPR for single-antenna and for MIMO systems. Some systems, however, use multiple antennas for frequency-selective transmit beamforming either to a single or multiple simultaneous ...
Timothy A. Thomas, Douglas L. Jones
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Effects of PAPR reduction on HPA predistortion

IEEE Transactions on Consumer Electronics, 2005
There have been many papers concerning about the peak to average power ratio (PAPR) reduction and high power amplifier (HPA) linearization techniques for wireless OFDM communication systems. Few papers, however, make deep analysis on the relation between these two techniques.
Bo Ai 0001, Zhixing Yang, Changyong Pan, Taotao Zhang, Jianhua Ge   +4 more
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Optimum selective mapping for PAPR reduction

2011 Wireless Telecommunications Symposium (WTS), 2011
High Peak-to-Average Power Ratio (PAPR) is a major drawback of multi-carrier transmission such as Orthogonal Frequency Division Multiplexing (OFDM). Various techniques have been proposed to reduce PAPR, among them SeLective Mapping (SLM) is a non-distortion method that incurs little loss in efficiency. In this paper, the criterion for optimum selective
Yanyan Wu, Ka Lok Man, Y. Wang
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PAPR Reduction in OFDM

International Journal of Emerging Research in Management and Technology, 2018
The term OFDM is a special type of FDM which has very vast application in the field of wired and wireless communication systems. In this paper we are discussing about the main problem of OFDM i.e. Peak to Average Power Ratio (PAPR) which affects the performance and efficiency of Power Amplifier.
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An Adaptive Coding Technique For PAPR Reduction

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007
In this work, we present an adaptive technique to reduce high peak-to-average power ratio in coded orthogonal frequency division multiplexing. High peak-to-average power ratio has been a primary hurdle for the use of orthogonal frequency division multiplexing in low cost applications.
Zafar Q. Taha, Xian Liu
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PAPR reduction using OQAM for spectrum sensing

International Journal of Pervasive Computing and Communications, 2020
Purpose The tremendous growth of wireless applications and the demand for high data rate, the spectrum utilization improvement has been the most crucial challenges for wireless communication. Adapting cognitive radio with orthogonal frequency division multiplexing or offset quadrature amplitude modulation (OFDM ...
Renuka N., Satya Sairam M.
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Intelligent interleaver for PAPR reduction

2008 Second International Conference on Electrical Engineering, 2008
In orthogonal frequency division multiplexing (OFDM) systems, one of the major problems to be tackled is high peak to average power ratio (PAPR). In this paper a PAPR reduction scheme for OFDM system is proposed that takes the advantage of the classification capability of learning vector quantization (LVQ) networks.
Seema Khalid, Imran zaka, Khawaja Tauseef Tasneem, Syed Ismail Shah, Jamil Ahmed   +4 more
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PAPR reduction in OFDM systems

2014 Annual IEEE India Conference (INDICON), 2014
In a communication system, operation of the transmitter power amplifier is limited to linear range. Input signal with an amplitude more than the transmitter power amplifier linear range results in signal distortion. Hence, the input signal to the transmitter should be with low peak to average power ratio.
Prasanta Kumar Pradhan, Satyendra Singh Yadav, Sarat Kumar Patra   +2 more
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PAPR reduction of OFDM by random phase updating

The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2003
A novel random phase updating algorithm for peak-to-average power ratio (PAPR) reduction of the OFDM signal is addressed. The phase of each subcarrier is updated by a random increment until the PAPR goes below a certain threshold level. The influence of different distributions for the phase increments and the variance of distributions on the mean and ...
Homayoun Nikookar, Knut Sverre Lidsheim
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A method for PAPR reduction in MSE-OFDM systems

20th International Conference on Advanced Information Networking and Applications - Volume 1 (AINA'06), 2006
High peak to average power ratio (PAPR) of the transmitted signal is a major drawback of multicarrier transmission such as orthogonal frequency division multiplexing (OFDM). This work considers the problem of PAPR reduction in a multi-symbol encapsulated OFDM (MSE-OFDM) system. This paper employs the discrete cosine transform (DCT) to the data sequence.
Enchang Sun, Kechu Yi, Bin Tian 0005, Xianbin Wang 0001   +3 more
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