Results 1 to 10 of about 184,131 (297)

TCM, TTCM, BICM and BICM-ID Assisted MMSE Multi-User Detected SDMA-OFDM Using Walsh-Hadamard Spreading

open access: yes, 2004
Space Division Multiple Access (SDMA) aided Orthogonal Frequency Division Multiplexing (OFDM) systems assisted by efficient Multi-User Detection (MUD) techniques have recently attracted intensive research interests. Forward Error Correction (FEC) schemes
Hanzo, L., Jiang, M., Ng, S. X.
core  

Orthogonal Transform Multiplexing with Memoryless Nonlinearity: a Possible Alternative to Traditional Coded-Modulation Schemes

open access: yes, 2017
In this paper, we propose a novel joint coding-modulation technique based on serial concatenation of orthogonal linear transform, such as discrete Fourier transform (DFT) or Walsh-Hadamard transform (WHT), with memoryless nonlinearity.
Zhidkov, Sergey V.
core   +1 more source

Polar-Coded GFDM Systems

open access: yesIEEE Access, 2019
Generalized frequency division multiplexing (GFDM) is a block-based non-orthogonal multicarrier modulation scheme proposed for 5G PHY layer. In this paper, to efficiently coordinate the features of interference existing in the GFDM system, we propose a ...
Yan Li, Kai Niu, Chao Dong
doaj   +1 more source

Variable Length Space Time Coded Modulation

open access: yes, 2005
A Variable Length Space Time Coded Modulation (VL-STCM) scheme capable of simultaneously providing coding, multiplexing and diversity gains is proposed.
Hanzo, L.   +3 more
core  

Fundamental performance limits of CPM coded modulation system

open access: yesTongxin xuebao, 2014
The study of the capacity of CPM systems was concerned with.The definition as well as the Finite-State-Machine (FSM) model of CPM was introduced.The development of calculating the capacity of CPM over AWGN channels was first reviewed.Then this ...
Bing LI, Fan WEI, Bao-ming BAI, Xiao MA
doaj   +2 more sources

Design of Mapping Matrix for Arithmetic Bit-Interleaved Coded Modulation

open access: yesIEEE Access, 2019
Arithmetic bit-interleaved coded modulation (A-BICM) is a coded rate compatible modulation (RCM). It achieves progressive mapping to strike a trade-off between high signal-to-noise ratio (SNR) and low SNR.
Jinkun Zhu   +4 more
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

Flexible digital modulation and coding synthesis for satellite communications [PDF]

open access: yes
An architecture and a hardware prototype of a flexible trellis modem/codec (FTMC) transmitter are presented. The theory of operation is built upon a pragmatic approach to trellis-coded modulation that emphasizes power and spectral efficiency.
Budinger, James   +3 more
core   +1 more source

Digital decoder for phase-delay coded data [PDF]

open access: yes, 1971
Coded or modulated digital data converts to nonreturn to zero /NRZ/ data. Technique includes logic implementation and pertinent timing diagrams. Demodulation to NRZ facilitates digital logic operations on incoming data.
Lewin, J.
core   +1 more source

LDPC Coded Modulation with Probabilistic Shaping for Optical Fiber Systems

open access: yes, 2015
An LDPC coded modulation scheme with probabilistic shaping, optimized interleavers and noniterative demapping is proposed. Full-field simulations show an increase in transmission distance by 8% compared to uniformly distributed input.Comment: 3 pages, 3 ...
Alvarado, Alex   +3 more
core   +1 more source

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