17 papers · ranked by Valyu relevance
Gregor Dumphart, Johannes Sager, Armin Wittneben
—This paper studies achievable information rates of backscatter communication systems where the tag performs load modulation with a freely adaptable passive termination. We find that the complex phasor of the tag current is constrained to a disk and that the capacity problem can therefore be described with existing…
Pavel Turalchuk, Irina Filipiuk, Bayazet Iskakov, Giuseppe Araniti + 4 more
'Chiara Suraci' 'Anna Maria Mandalari' 'Roberto Morabito' 'Antonino Orsino'] Power amplifiers are crucial components that significantly influence the linearity and energy efficiency of next-generation communication system radio units. A key challenge in designing power amplifiers is managing high peak-to-average power…
Jiachen Guo, Yuchen Cao, Kenle Chen
—This paper presents the first-ever highly linear and load-insensitive three-way load-modulation power amplifier (PA) based on reconfigurable hybrid asymmetrical load modulated balanced amplifier (H-ALMBA). Through proper amplitude and phase controls, the carrier, control amplifier (CA), and two peaking balanced…
Gregor Dumphart, Johannes Sager, Armin Wittneben
—In backscatter communication (BC), a passive tag transmits information by just affecting an external electromagnetic field through load modulation. Thereby, the feed current of the excited tag antenna is modulated by adapting the passive termination load. This paper studies the achievable information rates with a…
Yi Jin, Zhijiang Dai, Xiongbo Ran, Changzhi Xu + 4 more
'Xinyu Zhou' 'Wing Shing Chan' 'Liheng Zhou'] In this paper, the load modulation process of a Doherty power amplifier (DPA) is analyzed to address the issue of why designed DPAs have a very low efficiency in the back-off state in some cases. A general formula of the real load modulation process is also given for…
Marco Badii, Giovanni Lasagni, Monica Righini, Giovanni Collodi + 3 more
In this paper, we present an optimized driving strategy for a dual RF input envelope tracking power amplifier (ET PA) exploiting load modulation. The dual-input architecture enables dynamic load modulation (LM), allowing real-time adjustment of the load impedance to enhance performance over the signal dynamics typical…
Haipeng Zhu, Zhiwei Zhang, Chao Gu, Xuefei Xuan + 1 more
This paper presents a novel load modulation network to realize a broadband Doherty power amplifier (DPA). The proposed load modulation network consists of two generalized transmission lines and a modified coupler. A comprehensive theoretical analysis is carried out to explain the operation principles of the proposed…
Hilal Nizamoglu, Burcu A. Urgen
Considering its importance for one’s survival and social significance, biological motion (BM) perception is assumed to occur automatically. Indeed, 71 showed that task-irrelevant BM in the periphery interfered with task performance at the fovea. However, the neural underpinnings of this bottom-up processing of BM lacks…
Frida Torell, Sae Franklin, David W. Franklin, Michael Dimitriou
Voluntary movements are prepared before they are executed. Preparatory activity has been observed across the CNS and recently documented in first order neurons of the human PNS i.e., in muscle spindles. The changes seen in these sensory organs suggest that the independent modulation of stretch reflex gains may…
Tara Ghafari, Cecilia Mazzetti, Kelly Garner, Tjerk Gutteling + 1 more
Evidence suggests that subcortical structures play a role in high-level cognitive functions such as the allocation of spatial attention. While there is abundant evidence in humans for posterior alpha band oscillations being modulated by spatial attention, little is known about how subcortical regions contribute to…
Chenyang Li, Yulong Peng, Ruixue Wang, Xianhui He + 5 more
Retaining information in working memory (WM) is an active process that requires neural activity within and between regions. The human amygdala (AMY) and hippocampus (HPC) are known to play crucial roles in WM processing. Although electrophysiological studies have revealed that the HPC supports multi-item maintenance in…
Yafen Li, Yixuan Lin, Qing Li, Yongqiang Chen + 2 more
Concurrent verbal working memory task can eliminate the color-word Stroop effect. Previous research, based on specific and limited resources, suggested that the disappearance of the conflict effect was due to the memory information preempting the resources for distractors. However, it remains unclear which particular…
Authors not listed
Mechanochromic luminescent (MCL) materials have attracted growing attention owing to their potential applications in sensing, display, and security technologies. Although crystalline MCL materials have been the most intensively investigated, quantitative evaluation of their mechanical-stimuli-responsiveness remains…
Guangyuan Chen, Ning Xue, Zhimei Qi, Weichao Ma + 4 more
'Zhenhu Jin' 'Jiamin Chen' 'Yi Yang'] Electro-optic modulation devices are essential components in the field of integrated optical chips. High-speed, low-loss electro-optic modulation devices represent a key focus for future developments in integrated optical chip technology, and they have seen significant advancements…
Jessica Myatt, Robert Toth, Timothy Denison, Isaac Grennan + 3 more
Theta and gamma oscillations are prominent features of cortical local field potentials (LFPs) and stimulation of the motor cortex at these frequencies can enhance motor learning. Phase-targeted closed-loop stimulation could provide a more precise and effective method to modulate these oscillations, particularly if…
Sadra Rahimi Kari, Paolo Pintus, John Bowers, M. Robbins + 1 more
Niobate Resonant Devices Authors: ['Sadra Rahimi Kari' 'Paolo Pintus' 'John Bowers' 'M. Robbins' 'Nathan Youngblood'] We present a compact, resonant-based coherent modulator on a thin-film lithium niobate (TFLN) platform, addressing the growing demand for high-speed, energy-efficient modulators in modern…
Samir Katte
The following report contains user guides of four modulation schemes implementation using LabVIEW. The list of various modulation schemes is as follows: - Amplitude Modulation - Frequency Modulation - Binary Frequency Shift Keying - Quadrature Amplitude Modulation This report was submitted for the complete fulfillment…