Results 131 to 140 of about 1,061 (180)
Some of the next articles are maybe not open access.
Comparative analysis of peak-to-average power ratio (PAPR) reduction techniques for OFDM system
2013 4th International Conference on Computer and Communication Technology (ICCCT), 2013Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high-speed data transmission over multipath fading channels. However, it has some limitations such as the Peak-to-average power ratio (PAPR), which restricts its use. It reduces the efficiency of the system.
Prashant Pandey, Rajeev Tripathi
exaly +2 more sources
Precoding technique for peak-to-average-power-ratio (PAPR) reduction in MIMO OFDM/A systems
2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012The paper develops a new technique to reduce the peak to average power ratio (PAPR) in OFDM modulation for a MIMO system. The proposed method exploits the eigen-beamforming mode (EM) in MIMO systems which is a common feature in 4th generation standards: WiMAX and LTE.
Seyran Khademi +2 more
openaire +1 more source
Constant Modulus Algorithm for Peak-to-Average Power Ratio (PAPR) Reduction in MIMO OFDM/A
IEEE Signal Processing Letters, 2013A new peak-to-average power ratio (PAPR) reduction approach for MIMO-OFDM/A is developed based on the well-known constant modulus algorithm (CMA). This combines two ideas: 1) time domain signals from “resource blocks” (consisting of several subcarriers) may be linearly combined using precoding weights, transparent to the receiver; 2) the precoding ...
Seyran Khademi, Alle-Jan van der Veen
openaire +1 more source
Partially clipping (PC) method for the peak-to-average power ratio (PAPR) reduction in OFDM
2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2005OFDM (orthogonal frequency division multiplexing) has emerged as one of the best modulations for broadband mobile communications. Despite its robustness against multipath interference, the drawback of peak-to-average power ratio (PAPR) has to be overcome.
Marc Deumal +3 more
openaire +1 more source
Peak to average power ratio (PAPR) reduction in OFDM systems
International Multi Topic Conference, 2002. Abstracts. INMIC 2002., 2002Summary form only given, as follows. One of the main limitations of OFDM systems is that it exhibits high Peak to Average Power Ratio (PAPR). It is desirable to reduce it as high PAPR causes saturation in power amplifiers thus leading to inter-modulation products among the sub carriers.
openaire +1 more source
Coding Schemes Applied to Peak-to-Average Power Ratio (PAPR) Reduction in OFDM Systems
2008 International Wireless Communications and Mobile Computing Conference, 2008High PAPR of the transmitted signal is a major drawback in the OFDM systems. In this paper, coding schemes are proposed to reduce high PAPR One is using parity check coding scheme, and the other is using selected mapping (SLM) applied scheme. With parity check coding scheme, the parity information is used to expand the signal space.
Jyh-Horng Wen +3 more
openaire +1 more source
Peak-to-Average-Power-Ratio (PAPR) Reduction Methods with Wavelet Transform in MIMO-OFDM
IETE Journal of Research, 2017ABSTRACTThis study is based on the comparison of the results with an analysis method recommended for the Peak-to-Average-Power-Ratio (PAPR) reduction methods. This is one of the most significant problems in the Multiple Input–Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems.
Toren, Murat, Ciflikli, Cebrail
openaire +2 more sources
Peak-to-average power ratio (PAPR), fractional bandwidth and processing gain of UWB schemes
Eighth IEEE International Symposium on Spread Spectrum Techniques and Applications - Programme and Book of Abstracts (IEEE Cat. No.04TH8738), 2005This paper addresses the peak-to-average power ratio (PAPR), fractional bandwidth and processing gain of ultra-wideband (UWB) signals. First, the PAPR of UWB signals are derived and the numerical examples demonstrating PAPR values with Gaussian monocycle pulse shaping are presented.
S. Emami, C. Corral, G. Rasor
openaire +1 more source
Highly Efficient Transmitter for High Peak to Average Power Ratio (PAPR) Waveforms
2011Abstract : Aethercomm has shown that a high efficiency power amplifier can be developed to enhance efficiency over specific bands over frequencies ranging between 400MHz through 4000MHz with up to 67% efficiencies. These frequencies can be extended down to 30MHz and offer consistent performances by adding additional band functionality allowing support ...
Conni King, Alex Besprozvanny
openaire +1 more source
2013 International Conference on IT Convergence and Security (ICITCS), 2013
Orthogonal Frequency Division Multiplexing (OFDM) system is used for the reducing almost every kind of interference in any communication system. For designing OFDM system need to use FFT and IDFT phenomena of signal processing, in this work mainly concern to improve peak to average power ratio for this system because this system is multicarrier system,
Pankaj Joshi, Divyanshu Joshi
openaire +1 more source
Orthogonal Frequency Division Multiplexing (OFDM) system is used for the reducing almost every kind of interference in any communication system. For designing OFDM system need to use FFT and IDFT phenomena of signal processing, in this work mainly concern to improve peak to average power ratio for this system because this system is multicarrier system,
Pankaj Joshi, Divyanshu Joshi
openaire +1 more source