Results 21 to 30 of about 191,998 (317)

Efficient coding theory of dynamic attentional modulation.

open access: yesPLoS Biology, 2022
Activity of sensory neurons is driven not only by external stimuli but also by feedback signals from higher brain areas. Attention is one particularly important internal signal whose presumed role is to modulate sensory representations such that they ...
Wiktor Młynarski, Gašper Tkačik
doaj   +1 more source

Modulation network coding

open access: yesIET Communications, 2013
In this study, we propose a four‐dimensional modulation, referred to as modulation network coding (MNC), to address the problem of decoding a signal from multiple source node transmissions in mobile fast fading channels. The MNC scheme judiciously mixes a two‐dimensional (2D) pilot symbol with a 2D information symbol, and makes use
Eugène David Ngangue Ndih   +1 more
openaire   +2 more sources

Noncoherent coded modulation [PDF]

open access: yesIEEE Transactions on Communications, 1996
Summary: Trellis coded modulation with two or multidimensional signal constellations, together with coherent maximum-likelihood detection, is considered an attractive solution for communications over the additive white Gaussian noise (AWGN) channel. In this paper a new noncoherent communication system is introduced called noncoherent coded modulation ...
openaire   +2 more sources

Integrated LT Coding, Bit Interleaved Differential Space Time Coding and Sphere Packing Modulation for the Wireless Internet [PDF]

open access: yes, 2008
In this treatise, a jointly optimized Bit Interleaved Coded Modulation using Iterative Decoding (BICM-ID) and Luby Transform (LT) coding scheme was proposed for the sake of attaining the best possible performance, when communicating over the wireless ...
Wei, C.Y.   +9 more
core   +1 more source

Analog Network-Coded Modulation With Maximum Euclidean Distance: Mapping Criterion and Constellation Design

open access: yesIEEE Access, 2017
Physical-layer network coding holds the great potential of improving the power efficiency and the spectral efficiency for the two-stage transmission scheme. The first stage is the multiple access stage, where two source nodes (SN1 and SN2) simultaneously
Zhijiang Yu   +4 more
doaj   +1 more source

Modulation coding for flash memories [PDF]

open access: yes2013 International Conference on Computing, Networking and Communications (ICNC), 2013
7 pages, 9 figures, Proc.
Yongjune Kim 0001   +6 more
openaire   +2 more sources

Ternary Trellis Coded Modulation

open access: yesIEEE Access, 2019
Ternary trellis coded modulation (TTCM) is introduced. This combines triangular signal constellations with ternary convolutional codes. The performance of TTCM is presented and compared with binary trellis coded modulation (BTCM) which employs square ...
Mahmoud Abdelaziz, T. Aaron Gulliver
doaj   +1 more source

Iteratively Detected Irregular Variable Length Coding and Sphere-Packing Modulation-Aided Differential Space-Time Spreading [PDF]

open access: yes, 2007
In this paper we consider serially concatenated and iteratively decoded Irregular Variable Length Coding (IrVLC) combined with precoded Differential Space-Time Spreading (DSTS) aided multidimensional Sphere Packing (SP) modulation designed for near ...
Alamri, O.   +9 more
core   +1 more source

Orthogonal Space Time Block Coding for Spatial Pulse Position Modulation

open access: yesGuangtongxin yanjiu, 2021
The system performance of Spatial Pulse Position Modulation (SPPM) is poor in turbulent channels. In order to solve this problem, the bit complement orthogonal space time Block Coding for Spatial Pulse Position Modulation (BCOSTBCSPPM) is proposed by ...
Zhong-yang MAO   +5 more
doaj   +1 more source

Network coded modulation for two-way relaying [PDF]

open access: yes, 2011
Network coding compresses multiple traffic flows with the aid low-complexity algebraic operations, hence holds the potential of significantly improving both the power and bandwidth efficiency of wireless networks.
Chen, Wei   +5 more
core   +1 more source

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