Results 11 to 20 of about 206,717 (263)
Adaptive Wavelet Packet Modulation [PDF]
IEEE Transactions on Communications, 2018 In this paper, we propose a new adaptive modulation based on the wavelet packet transform, which targets a good resistance against frequency selective channels while avoiding a large PAPR. Classical multi-carrier modulation schemes divide the channel bandwidth into narrowband sub-channels to improve its robustness against frequency selective fading ...
Chafii, Marwa +3 more
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Energy-Efficient Adaptive Modulation and Data Schedule for Delay-Sensitive Wireless Communications
IEEE Access, 2020 In this paper, targeting at improving the energy efficiency (EE) for Quality-of-Service (QoS)-guaranteed wireless communications, we develop new adaptive modulation and data scheduling algorithms for delay-sensitive bursty data.
Qian Chen +4 more
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Attentional modulation of adaptation in V4 [PDF]
European Journal of Neuroscience, 2009 AbstractAdaptation and visual attention are two processes that alter neural responses to luminance contrast. Rapid contrast adaptation changes response size and dynamics at all stages of visual processing, while visual attention has been shown to modulate both contrast gain and response gain in macaque extrastriate visual cortex. Because attention aims
Andrew E, Hudson +3 more
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Analysis of the Capacity, Spectral Efficiency and Probability of Outage of Adaptive Mobile Channel for WiMAX System [PDF]
Engineering and Technology Journal, 2014 This paper presents an analysis of the channel capacity, spectral efficiency and probability of outage for the 4th generation adaptive modulation ofWiMAX system.
Hadi T. Ziboon, Wasan S. Rasheed
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Adaptive Modulation Method of EON based on Deep Neural Network
Guangtongxin yanjiu, 2021 In order to maximize the total spectrum efficiency and improve the Quality of Experience (QoE) on Elastic Optical Network (EON), an adaptive modulation method based on Deep Neural Network (DNN) is proposed.
Jian-hua WANG, Yu-kun RAN, Jie ZHAO
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IET Signal Processing, 2021 A novel 2‐bit adaptive delta modulation (ADM) algorithm is presented based on uniform scalar quantization and fractional linear prediction (FLP) for encoding the signals modelled by a Gaussian probability density function. The study focusses on two major
Zoran Peric +2 more
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Remote Sensing, 2022 Underwater acoustic (UWA) adaptive modulation (AM) requires feedback about channel state information (CSI) but the long propagation delays and time-varying features of UWA channels can cause the CSI feedback to be outdated.
Yuzhi Zhang +5 more
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IEEE Photonics Journal, 2015 We proposed and experimentally demonstrated a wavelength-space division multiplexing (WSDM) optical access network architecture with centralized optical carrier delivery utilizing multicore fibers (MCFs) and adaptive modulation based on reflective ...
Zhenhua Feng +15 more
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Spectral efficiency of adaptive OFDM systems over high mobility Nakagami-m fading channels
Systems Science & Control Engineering, 2020 In this paper, we investigate the impact of rate and power adaptation (RPA) and rate adaptation (RA) using square M-ary quadrature amplitude modulation (MQAM) on the average spectral efficiency (ASE) of orthogonal frequency division multiplexing (OFDM ...
Xiuyan Zhang, Qiming Sun, Yan Gao
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On the Adaptive Modulation for User-Centric Cell-Free Massive MIMO Systems
IEEE AccessThe cell-free (CF) systems are a key technology for future wireless networks, which exploit the scenario spatial macro-diversity to offer high channel capacity and link reliability, uniform user quality of service (QoS), and better coverage.
Danilo B. T. Almeida +6 more
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