23 papers · ranked by Valyu relevance
Tie Jun Cui, Shuo Liu, Guo Dong Bai, Qian Ma
In modern wireless communications, digital information is firstly converted to analog signal by a digital-analog convertor, which is then mixed to high-frequency microwave to be transmitted through a series of devices including modulator, mixer, amplifier, filter, and antenna and is finally received by terminals via a…
Alireza Sheikh, Alexandre Graell i Amat, Gianluigi Liva
Coded modulation (CM) schemes allow achieving high spectral efficiencies as required by the increasing demand for network capacity. By suitably choosing the probability of occurence of the constellation points, probabilistic shaping can significantly improve the efficiency of CM. It has been recently demonstrated that…
Yuejun Wei, Yue Chen, Chunqi Chen, Bin Xia + 3 more
'Guojun Han' 'Zhiping Shi'] Multi-level coded modulation (MLCM) enhances data transmission by allocating error correction more effectively to bits with higher error probabilities, thus optimizing redundancy and improving performance. Despite MLCM’s advantages over traditional bit-interleaved coded modulation (BICM)…
Giulio Ruffini
Hierarchical encoding is a structural element of the Free Energy Principle and related information-centric accounts of brain function, but a concrete circuit-level mechanism for it remains elusive. Here we examine Hierarchical Amplitude Modulation (HAM). In this computationally grounded scheme, information is encoded…
Amir H. Jafari, T. O’Farrell
—Spatial complementary code keying modulation (SC-CKM) is proposed as a novel block coding modulation scheme. An input binary sequence is modulated based on the different lengths of complementary code keying (CCK) modulation and then spread across the transmit antennas (spatial domain) in a multiple input multiple…
Sergey Zhidkov
—In this paper, we propose a novel joint codingmodulation technique based on serial concatenation of orthogonal linear transform, such as discrete Fourier transform (DFT) or Walsh-Hadamard transform (WHT), with memoryless nonlinearity. We demonstrate that such a simple signal construction may exhibit properties of a…
Sheeba Armoogum, Vinaye Armoogum, Jayprakash Gopaul
This paper is a thorough study of a digital television broadcasting system adapted to the small mountainous island of Mauritius. A digital TV LAN was designed with MPEG-2 signals. The compressed signals were transmitted using DVB-T and QAM modulators. QAM-16 and QAM-64 modulators were designed and tested with a…
Bin Yu, Guo-Ping Jiang, Hua Yang, Ya-Qiong Jia + 3 more
'Chintha Tellambura'] In this paper, a modified code index modulation scheme based on the multi-carrier M-ary DCSK system, referred to as a MC-MCIM-MDCSK system, is proposed. In the proposed MC-MCIM-MDCSK system, a modified code index modulation scheme is carried out, which selects two orthogonal Walsh codes for…
A. J. Han Vinck
I also want to thank the numerous students that participated in my research during a period of over forty years. During my stay in the Institute for Experimental Mathematics, also many foreign guests participated in the research and over 100 papers were published in journals. Part of these results are presented in this…
Chengxiang Peng, Paul Annus, Marek Rist, Raul Land + 2 more
'Xiaoning Jiang'] Ultrasonic testing (UT) is a vital nondestructive testing (NDT) technique used to evaluate the integrity of materials and structures. However, conventional excitation signals often suffer from significant attenuation in highly attenuative materials, resulting in low signal energy and poor signal…
Jonathan M. Gant, Wiktor F. Młynarski
Behavior modulates the activity of sensory systems in multiple ways: from gain changes in individual neurons to changing interactions in neural populations. These effects are not universal; while movement has a strong influence on sensory coding in rodents, its impact on primates is less prominent. The diversity of…
Jonathan M. Gant, Wiktor F. Młynarski
Locomotion modulates the activity of sensory systems in multiple ways: from gain changes in individual neurons to changing interactions in neural populations. These effects are not universal; while movement has a strong influence on sensory coding in rodents, its impact on primates is less prominent. The diversity of…
Rasadurai Kumaravel, Kumaratharan Narayanaswamy, Haipeng Peng
Multi carrier code division multiple access (MC-CDMA) system is a promising multi carrier modulation (MCM) technique for high data rate wireless communication over frequency selective fading channels. MC-CDMA system is a combination of code division multiple access (CDMA) and orthogonal frequency division multiplexing…
Weimin Kang, Jun Chen, Sadaf Salehkalaibar
In this paper, a novel, nonbinary (NB) LDPC-coded probabilistic shaping (PS) scheme for a Rayleigh fading channel is proposed. For the NB LDPC-coded PS scheme in Rayleigh fading channel, the rotation angle of 16 quadrature amplitude modulation (QAM) constellations, 64QAM constellations and 256QAM constellations are…
Ismail Shakeel, Jack Hilliard, Weimin Zhang, Mark Rice + 1 more
'Pablo Angueira'] Covert communication techniques play a crucial role in military and commercial applications to maintain the privacy and security of wireless transmissions from prying eyes. These techniques ensure that adversaries cannot detect or exploit the existence of such transmissions. Covert communications…
Mikel Hernáez, Pedro M. Crespo, Javier Del Ser
—This letter introduces a novel channel coding design framework for short-length codewords that permits balancing the tradeoff between the bit error rate floor and waterfall region by modifying a single real-valued parameter. The proposed approach is based on combining convolutional coding with a q-ary linear…
Sanjay Singh, M. Sathish Kumar, H.S Mruthyunjaya
Increasing demands on high data rate mobile communications services will inevitably drive future broadband mobile communication systems toward achieving data transmission rates in excess of 100 Mbps. One of the promising technologies which can satisfy this demand on high data rate mobile communications services is the…
David M. Benton, You Yang
Concurrent coding is an encoding scheme with ‘holographic’ type properties that are shown here to be robust against a significant amount of noise and signal loss. This single encoding scheme is able to correct for random errors and burst errors simultaneously, but does not rely on cyclic codes. A simple and practical…
Mohsen Parto-Dezfouli, Isabel Vanegas, Mohammad Zarei, William H. Nesse + 2 more
In order to understand how prefrontal cortex provides the benefits of working memory (WM) for visual processing we examined the influence of WM on the representation of visual signals in V4 neurons in two macaque monkeys. We found that WM induces strong β oscillations in V4 and that the timing of action potentials…
Md. Golam Rashed, M. Hasnat Kabir, Md Selim Reza, Md. Matiqul Islam + 3 more
'Rifat Ara Shams' 'Saleh Masum' 'Sheikh Enayet Ullah'] In this paper, we investigate the impact of Forward Error Correction (FEC) codes namely Cyclic Redundancy Code and Convolution Code on the performance of OFDM wireless communication system for speech signal transmission over both AWGN and fading (Rayleigh and…
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…
Thach V. Bui
Neural coding is an important tool to discover the inner workings of mind. In this work, we propose and consider a simple but novel self-decoding model for neural coding based on the principle that the neuron body represents ongoing stimulus while dendrites are used to store that stimulus as a memory. In particular…
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…