Results 141 to 150 of about 275 (168)
Some of the next articles are maybe not open access.
A Generalized Piecewise Linear Companding Transform for PAPR Reduction in OFDM Systems
IEEE Transactions on Broadcasting, 2020Companding is a well-known technique for the peak-to-average-power ratio (PAPR) reduction of orthogonal frequency division multiplexing (OFDM) signals. Piecewise linear companding (PLC) scheme, compared with other companding schemes, can effectively reduce PAPR with much lower complexity, while achieving improved bit-error-rate (BER) performance ...
Meixia Hu +3 more
openaire +1 more source
PAPR Reduction in Universal Filtered Multicarrier Systems with Companding Transform
2020 Third International Conference on Advances in Electronics, Computers and Communications (ICAECC), 2020Universal filtered multi carrier (UFMC) is an alternative waveform for both orthogonal frequency division multiplexing and filter bank multi carrier. High spectral efficiency is the attractive feature of 5G UFMC system. However, UFMC undergoes with high peak-to-average power ratio (PAPR), which affects the efficiency of power amplifier.
Vijaya Durga Chintala, Anuradha Sundru
openaire +1 more source
Companding transformation display for 12 bit image data
Optics and Precision Engineering, 2011Based on the digital communication companding transformation principle,a 16-polygonal line geometric partition method which maps 12-bit image data to 8-bit data was proposed to display 12-bit image information on a 8-bit gray scale monitor.The formulas for calculating the linear and nonlinear quantization Signal to Noise Ratio(SNRs) were derived.By ...
范赐恩 FAN Ci-en +4 more
openaire +1 more source
An Efficient Piecewise Nonlinear Companding Transform for PAPR Reduction in UFMC Systems
2019 IEEE/CIC International Conference on Communications in China (ICCC), 2019Universal Filtered Multi-Carrier (UFMC) is a potential multicarrier modulation system for future mobile communication. However, UFMC system also has the problem of high peak-to-average power ratio (PAPR), which might impact on power amplifiers leading to nonlinear distortion.
Kaiming Liu, Yaning Ge, Yuanan Liu
openaire +1 more source
An Efficient Nonlinear Companding Transform Method for PAPR Reduction of GFDM signals
2018 IEEE/CIC International Conference on Communications in China (ICCC), 2018Generalized Frequency Division Multiplexing (GFDM) has been regarded as one of the most promising multicarrier modulation schemes for the upcoming fifth generation (5G) mobile communication system. However, similar to other multicarrier schemes, GFDM still suffers from the problem of high Peak-to-Average Power Ratio (PAPR).
Kaiming Liu, WeiFeng Deng, Yuanan Liu
openaire +1 more source
PAPR reduction of FBMC signals by combining exponential companding and hadamard transforms
The 2014 International Symposium on Networks, Computers and Communications, 2014Filter Bank Multicarrier (FBMC) is an efficient multicarrier modulation characterized by its good spectral efficiency and low out of band leakage. Nevertheless, FBMC signals suffer from the high Peak-to-Average Power Ratio (PAPR). This leads nonlinear devices such as Power Amplifiers, when used, to operate in their saturation region which may severely ...
Brahim Elmaroud +3 more
openaire +1 more source
Companding Transform Assisted Constant Envelope OFDM
2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring), 2023Chongda Huang, Lilin Dan, Yue Xiao 0001
openaire +1 more source
Nonlinear companding transforms for reducing the PAPR of OTFS signal
Physical Communication, 2022Hanumantharao Bitra +3 more
openaire +1 more source
Exponential Companding Transform to Mitigate PAPR in SC-FDMA Systems
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), 2019Long Term Evolution (LTE) chose Single Carrier Frequency Division Multiple Access (SC-FDMA) for uplink communications due to lower signal envelope changes in SC-FDMA signal. This enables low peak to average power ratio (PAPR) in SC-FDMA in contrast to Orthogonal Frequency Division Multiple Access (OFDMA).
K. Shri Ramtej, S. Anuradha
openaire +1 more source
A hybrid companding transform technique for PAPR reduction of OFDM signals
2015 13th International Conference on Electromagnetic Interference and Compatibility (INCEMIC), 2015Orthogonal Frequency Division Multiplexing (OFDM) is an attractive technique for wireless communication applications. However, an OFDM signal has a large Peak-to-Average Power Ratio (PAPR), which can result in significant distortion when passed through a nonlinear device, such as a transmitter power amplifier. Number of techniques has been proposed for
D. Durga Prasad, M. V. Nageswara Rao
openaire +1 more source