Results 11 to 20 of about 574 (170)

Turbo Trellis-Coded Hierarchical-Modulation Assisted Decode-and-Forward Cooperation [PDF]

IEEE Transactions on Vehicular Technology, 2015
Hierarchical modulation (HM), which is also known as layered modulation, has been widely adopted across the telecommunication industry. Its strict backward compatibility with single-layer modems and its low complexity facilitate the seamless upgrading of wireless communication services.
Hua Sun, Soon Xin Ng, Lajos Hanzo
openaire   +4 more sources

Adaptive Turbo Trellis Coded Modulation Aided Distributed Space-Time Trellis Coding for Cooperative Communications [PDF]

2010 IEEE 71st Vehicular Technology Conference, 2010
In this contribution, we propose an adaptive Turbo Trellis Coded Modulation (TTCM) aided Distributed Space-Time Trellis Coding (STTC) scheme for cooperative communication over quasi-static Rayleigh fading channels. An adaptive TTCM (ATTCM) scheme is employed by the source node during the first transmission period for reliably conveying the source bits ...
Soon Xin Ng, Chuyi Qian, Dandan Liang, Lajos Hanzo   +3 more
openaire   +2 more sources

Improved Iterative Decoding of Network-Channel Codes for Multiple-Access Relay Channel. [PDF]

Int Sch Res Notices, 2015
Cooperative communication using relay nodes is one of the most effective means of exploiting space diversity for low cost nodes in wireless network. In cooperative communication, users, besides communicating their own information, also relay the information of other users.
Majumder S, Verma S.
europepmc   +2 more sources

Integer programming‐based non‐uniform window decoding schedules for spatially coupled low‐density parity‐check codes

IET Communications, Volume 16, Issue 17, Page 2019-2035, October 2022., 2022
Abstract Spatially coupled low‐density parity‐check (SC‐LDPC) codes generally use a window decoding scheme, which is known to yield a near‐optimal decoding, compared to full block decoding. Recently, a non‐uniform schedule has been proposed to eliminate unnecessary updates of variable nodes within a window: this schedule is generated based on the ...
Sirawit Khittiwitchayakul, Watid Phakphisut, Pornchai Supnithi   +2 more
wiley   +1 more source

[Retracted] Path Selection Strategy of Communication Network Based on Graph Convolutional Neural Network

Security and Communication Networks, Volume 2022, Issue 1, 2022., 2022
In order to improve the efficiency of communication network path selection, this paper combines the graph convolutional neural network to formulate the communication network path selection strategy and selects the enhanced decoding algorithm as the fixed‐point decoding algorithm. For the quantization scheme based on the enhanced decoding algorithm, the
Xiaojun Zhang, Zhiping Cai
wiley   +1 more source

Improving Anticompression Robustness of JPEG Adaptive Steganography Based on Robustness Measurement and DCT Block Selection

Security and Communication Networks, Volume 2021, Issue 1, 2021., 2021
With the development of the Internet, social network platforms (SNPs) have become the most common channel for image sharing. As a result, transmitting stego images in the public channels gives steganographers the best opportunity to transmit secret messages with behavioral security preserved.
Haocheng Fu, Xianfeng Zhao, Xiaolei He, Jinwei Wang   +3 more
wiley   +1 more source

Joint source and turbo trellis coded hierarchical modulation for context-aware medical image transmission [PDF]

, 2013
An iterative Joint Source and Turbo Trellis Coded Hierarchical Modulation is introduced for robust context-aware medical image transmission. Lossless source compression as well as Quality of Service (QoS) might be considered as the main constraints in ...
Abdulah Jeza Aljohani, Soon Xin Ng, Aljohani, Abdulah Jeza, Ng, Soon Xin, Hanzo, Lajos, Hua Sun, Lajos Hanzo, Sun, Hua   +7 more
core   +1 more source

On the Design of Turbo Trellis Coded Modulation schemes using Symbol-based EXIT Charts [PDF]

, 2006
In this paper we design bandwidth efficient parallel-concatenated Turbo Trellis Coded Modulation (TTCM) schemes for communicating over AWGN and uncorrelated Rayleigh fading channels.
Kliewer, J., Alamri, O., Ng, S. X., S. Ng, J. Kliewer, O. Alamri, L. Hanzo, Hanzo, L.   +7 more
core   +1 more source

A Novel Concatenated Coded Modulation Based on GFDM for Access Optical Networks

IEEE Photonics Journal, 2018
In this paper, we proposed a novel concatenated coded modulation composed of adaptive turbo code with trellis-coded modulation (ATTCM) that is based on generalized frequency division multiplex (GFDM) system.
Feng Tian, Dong Guo, Bo Liu, Qi Zhang, Qinghua Tian, Rahat Ullah, Xiangjun Xin   +6 more
doaj   +1 more source

Distributed Joint Source-Channel Coding-Based Adaptive Dynamic Network Coding

IEEE Access, 2020
Distributed Source Coding (DSC) schemes rely on separate encoding but joint decoding of statistically dependent sources, which exhibit correlation. More specifically, Distributed Joint Source-Channel coding (DJSC) is associated with the scenario, where ...
Abdulah Jeza Aljohani, Soon Xin Ng
doaj   +1 more source