Results 21 to 30 of about 11,848 (246)
Interleaved-LoRa Transmission Scheme for Satellite IoT
天地一体化信息网络, 2023 The transmission distance of satellite IoT is much further than terrestrial IoT, resulting in a signifi cant power loss on the transmission link.Thus the received signal power at a receiver will be signifi cantly lower.Combining a high-performance FEC ...
Jin LUO +3 more
doaj +2 more sources
Combined Source-Channel Coding of Images under Power and Bandwidth Constraints
EURASIP Journal on Advances in Signal Processing, 2007 This paper proposes a framework for combined source-channel coding for a power and bandwidth constrained noisy channel. The framework is applied to progressive image transmission using constant envelope M-ary phase shift key (M-PSK) signaling over an ...
Marc Fossorier +2 more
doaj +2 more sources
Nonbinary LDPC-Coded Modulation System in High-Speed Mobile Communications
IEEE Access, 2018 As a class of capacity-approaching codes, nonbinary low-density parity-check (LDPC) codes have attracted much attention because of noticeable performance.
Dan Feng +5 more
doaj +1 more source
, 2004 Decision feedback equalizer (DFE)-aided turbocoded wideband adaptive quadrature amplitude modulation (AQAM) is proposed, which is capable of combating the temporal channel quality variation of fading channels. A procedure is suggested for determining the
Hanzo, L., Liew, T.H., Wong, C.H.
core +1 more source
IEEE Photonics Journal, 2019 In this paper, a low-density parity check (LDPC) coded GFDM with high-level modulation scheme is proposed for more flexible and advanced multicarrier modulation in intensity-modulated/direct-detection (IM/DD) optical systems.
Dong Guo +10 more
doaj +1 more source
Constellation Shaping for WDM systems using 256QAM/1024QAM with Probabilistic Optimization [PDF]
, 2016 In this paper, probabilistic shaping is numerically and experimentally investigated for increasing the transmission reach of wavelength division multiplexed (WDM) optical communication system employing quadrature amplitude modulation (QAM).
Da Ros, Francesco +7 more
core +2 more sources
Distributed Turbo Trellis Coded Modulation for Cooperative Communications [PDF]
2009 IEEE International Conference on Communications, 2009 In this contribution, we propose a Distributed Turbo Trellis Coded Modulation (DTTCM) scheme for cooperative communications. The DTTCM scheme is designed based on its decoding convergence with the aid of non-binary Extrinsic Information Transfer (EXIT) charts. The source node transmits TTCM symbols to both the relay and the destination nodes during the
Soon Xin Ng +2 more
openaire +1 more source
Codebook Design for PD-SCMA NOMA Systems
IEEE Access, 2023 The hybrid power domain sparse code non-orthogonal multiple access (PD-SCMA) scheme multiplexes multiple users on a single resource element (RE) both in power and code domains, thus achieving a superior spectral efficiency.
Simon Chege, Tom Walingo, Foued Derraz
doaj +1 more source
, 2001 In this contribution, the performance of trellis coded modulation (TCM), bit-interleaved coded modulation (BICM), BICM with iterative decoding (BICM-ID) and turbo trellis coded modulation (TTCM) is studied in comparison to the pan-European terrestrial ...
Hanzo, L. +3 more
core +1 more source
Advanced Science, EarlyView.This study explores the opposing effects of the mGluR2 and mGluR3 receptors on amyloid precursor protein processing. mGluR2 promotes amyloidogenic cleavage, while mGluR3 favors non‐amyloidogenic pathways. Using a brain‐penetrant nanobody as a mGluR2 positive allosteric modulator, the study uncovers how its chronic activation aggravates amyloid‐β burden
Pierre‐André Lafon +21 more
wiley +1 more source