20 papers · ranked by Valyu relevance
Hugo Méric, José Piquer, Jérôme Lacan
Recently, we proposed to combine time sharing with hierarchical modulation to increase the transmission rate of broadcast systems. Our proposal involves to group the receivers in pairs in order to transmit with hierarchical modulation. We introduced several grouping strategies but the optimal matching remained an open…
Wiktor Młynarski, Josh H. McDermott
Events and objects in the world must be inferred from sensory signals to support behavior. Because sensory measurements are temporally and spatially local, the estimation of an object or event can be viewed as the grouping of these measurements into representations of their common causes. Per-ceptual grouping is…
Jake P. Stroud, Mason A. Porter, Guillaume Hennequin, Tim P. Vogels
Motor cortex (M1) exhibits a rich repertoire of activities to support the generation of complex movements. Although recent neuronal-network models capture many qualitative aspects of M1 dynamics, they can generate only a few distinct movements. Additionally, it is unclear how M1 efficiently controls movements over a…
Zheng Dong, Yanyu Zhang, Jian‐Kang Zhang, Xiangchuan Gao
—This paper considers a discrete-time multiuser multiple-input single-output (MISO) Gaussian broadcast channel (BC), in which channel state information (CSI) is available at both the transmitter and the receivers. The flexible and explicit design of a uniquely decomposable constellation group (UDCG) is provided based…
Xinghao Guo, Yin Xu, Dazhi He, Cixiao Zhang + 2 more
'Yiyan Wu'] Abstract—Index modulation (IM) significantly enhances the spectral efficiency of fluid antennas (FAs) enabled multipleinput multiple-output (MIMO) systems, which is named FA-IM. However, due to the dense distribution of ports on the FA, the wireless channel exhibits a high spatial correlation, leading to…
Yifei Yang, Shuowen Zhang, Joni Polili Lie, Rui Zhang
Orthogonal frequency division multiplexing (OFDM) and singlecarrier frequency domain equalization (SC-FDE) are two commonly adopted modulation schemes for frequency-selective channels. Compared to SC-FDE, OFDM generally achieves higher data rate, but at the cost of higher transmit signal peak-to-average power ratio…
Taissir Y. Elganimi, Khaled M. Rabie
—A novel space-time parallel index modulation scheme is proposed in this paper for conveying extra digital information with the aid of space and time indices. In this proposed scheme, time-indexing is cleverly performed in parallel spatial modulation (PSM) schemes using transmit antenna grouping, and referred to as…
Hyojin Kim, Viktorija Ratkute, Bastian Epp
The relevance of masking release by comodulation and interaural phase difference (IPD) for speech perception is still unclear. We used speech-like stimuli to link spectro-temporal properties of formants with masking release. The stimuli comprised a tone and three masker bands centered at formant frequencies F1, F2, and…
Hyojin Kim, Viktorija Ratkute, Bastian Epp
When a target tone is preceded by a noise, the threshold for target detection can be increased or decreased depending on the type of a preceding masker. The effect of preceding masker to the following sound can be interpreted as either the result of adaptation at the periphery or at the system level. To disentangle…
Hafsa Farooqi, Jerrold L. Vitek, David Escobar Sanabria
Precise neuromodulation systems are needed to identify the role of neural oscillatory dynamics in brain function, and to advance the development of electrical stimulation therapies tailored to each patient’s signature of brain dysfunction. Low-frequency, local field potentials (LFPs) are of increasing interest for the…
Authors not listed
This paper formally defines an operational isomorphism between spectral damping in molecular vibronic systems and neuromodulatory control in biological sensory systems. Without asserting causal continuity or physical identity across scales, we show that both domains instantiate the same class of output-selective…
Zhenkai Liu, Bibo Zhang, Hao Luo, Hao He + 1 more
Orthogonal time-frequency space (OTFS) modulation has emerged as a promising technology to alleviate the effects of the Doppler shifts in high-mobility environments. As a prerequisite to demodulation and signal processing, automatic modulation classification (AMC) is essential for OTFS systems. However, a very limited…
Haowen Shu, Zhaotang Su, Le Huang, Zhennan Wu + 3 more
'Zhiyong Zhang' 'Zhiping Zhou'] We theoretically and experimentally demonstrate a significantly large modulation efficiency of a compact graphene modulator based on a silicon waveguide using the electro refractive effect of graphene. The modulation modes of electro-absorption and electro-refractive can be switched with…
Authors not listed
We develop a highly parallelizable algorithm to calculate long-range electrostatic interactions named the Gauss-Legendre-Spherical-t (GLST) cubature method. Motivated by our recent spherical grid and treecode method, we utilize the Gauss-Legendre quadrature for integration over a finite range and spherical t-design for…
Jin Yuan, Tigang Ning, Jing Li, Li Pei + 2 more
We present a novel approach for triangular-shaped waveform generation by applying optical single sideband (OSSB) modulation and optical carrier suppression (OCS) modulation to an input signal. Firstly, an OSSB modulated signal consists of an optical carrier and +1st-order sideband, is initially generated with a…
Mohamed A. Abdel-Moneim, Khalil F. Ramadan, El-Sayed M. El-Rabaie, Fathi E. Abd El-Samie + 1 more
Underwater acoustic (UWA) communication systems operate in severe channel impairments, including strong multipath propagation, long delay spreads, frequency selectivity, Doppler effects, and high ambient noise. These challenges significantly complicate automatic modulation classification (AMC), especially in dense…
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…
Weilei Gou, Yuan Yu, Xinliang Zhang
Optical beating is the usual approach to generation of microwave signals. However, the highest frequency achievable for microwave signals is limited by the bandwidths of optoelectronic devices. To maximize the microwave frequency with a limited bandwidth of a photodetector (PD) and relieve the bandwidth bottleneck, we…
Arthur James Lowery
This paper charts the development of spectrally efficient forms of optical orthogonal frequency division multiplexing (OFDM) that are suited for intensity-modulated direct detection systems, such as wireless optical communications. The journey begins with systems using a DC-bias to ensure that no parts of the signal…
Authors not listed
Allosteric modulators offers a promising approach for targeting receptor function in pathological contexts. Although numerous orthosteric ligands have been developed, the discovery of allosteric inhibitors remains limited, hindered by challenges with identifying modulators and the perceived lower druggability of…