Results 21 to 30 of about 3,362 (185)

Low-Complexity Non-uniform Constellation Demapping Algorithm for Broadcasting System [PDF]

International Journal of Electronics and Telecommunications, 2019
This paper presents a novel low-complexity soft demapping algorithm for two-dimensional non-uniform spaced constellations (2D-NUCs) and massive order one-dimensional NUCs (1D-NUCs).
Chen Wang, Fang Wang, Mingqi Li, Jinfeng Tian   +3 more
doaj   +1 more source

Volumetric Quantitative Ablation Margins for Assessment of Ablation Completeness in Thermal Ablation of Liver Tumors

Frontiers in Oncology, 2021
BackgroundIn thermal ablation of liver tumors, complete coverage of the tumor volume by the ablation volume with a sufficient ablation margin is the most important factor for treatment success. Evaluation of ablation completeness is commonly performed by
Raluca-Maria Sandu, Iwan Paolucci, Simeon J. S. Ruiter, Raphael Sznitman, Koert P. de Jong, Jacob Freedman, Stefan Weber, Pascale Tinguely, Pascale Tinguely   +8 more
doaj   +1 more source

3D Quantitative Ablation Margins for Prediction of Ablation Site Recurrence After Stereotactic Image-Guided Microwave Ablation of Colorectal Liver Metastases: A Multicenter Study

Frontiers in Oncology, 2021
BackgroundThree-dimensional (3D) volumetric ablation margin assessment after thermal ablation of liver tumors using software has been described, but its predictive value on treatment efficacy when accounting for other factors known to correlate ablation ...
Simeon J. S. Ruiter, Pascale Tinguely, Pascale Tinguely, Iwan Paolucci, Jennie Engstrand, Daniel Candinas, Stefan Weber, Robbert J. de Haas, Koert P. de Jong, Jacob Freedman   +9 more
doaj   +1 more source

Pengaruh Link Relay Terhadap Kinerja Komunikasi Kooperatif Vehicle-to-Vehicle (V2V)

Jurnal Elkomika, 2022
ABSTRAK Kebutuhan komunikasi bergerak saat ini sangat tinggi, Vehicular Ad-hoc Network (VANET) merupakan metode teknologi telekomunikasi untuk komunikasi bergerak pada kendaraan.
ISNAN MUHARRAM, RAMZI ADRIMAN, NASARUDDIN NASARUDDIN   +2 more
doaj   +1 more source

Transmission of OCDM Based on Asymmetric Pair Mapping Over a Seven Core Fiber

IEEE Photonics Journal, 2022
In this paper, transmission of orthogonal chirp division multiplexing (OCDM) based on asymmetric pair mapping over a seven core fiber is proposed. High-order 32 quadrature amplitude modulation (QAM) is reduced to quadrature phase-shift keying (QPSK) and ...
Shuaidong Chen, Bo Liu, Jianxin Ren, Yaya Mao, Xiangyu Wu, Rahat Ullah, Xiumin Song, Yu Bai, Yibin Wan, Suiyao Zhu, Yongfeng Wu, Lilong Zhao, Tingting Sun   +12 more
doaj   +1 more source

Comparison of 128-SP-QAM with PM-16-QAM

Optics Express, 2012
In this paper we investigate an interesting modulation format for fiber optic communications, set-partitioning 128 polarization-multiplexed 16-QAM (128-SP-QAM), which consists of the symbols with even parity from the symbol alphabet of polarization-multiplexed 16-QAM (PM-16-QAM).
Martin, Sjödin, Pontus, Johannisson, Jianqiang, Li, Erik, Agrell, Peter A, Andrekson, Magnus, Karlsson   +5 more
openaire   +2 more sources

On the capacity of BICM with QAM constellations [PDF]

Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly, 2009
In this tutorial paper we analyze the capacity of bit-interleaved coded modulation (BICM) with quadrature amplitude modulation (QAM) constellations, and we pay special attention to different bit-to-symbol labeling strategies. The relation between the BICM capacity and the capacity of other CM schemes such as trellis coded modulation (TCM) and ...
Alex Alvarado, Erik Agrell, Arne Svensson   +2 more
openaire   +1 more source

Noise Shaping Enhanced DMT Signal Transmission Utilizing Low-Resolution DAC

IEEE Photonics Journal, 2021
In order to reduce the quantization noise of low-resolution DAC, we study a noise shaping technique that can reshape the white quantization noise to an irregular spectrum, in which the noise in the data subcarrier band is almost transformed into the null
Fan Li, Zhibin Luo, Ke Bai, Mingzhu Yin, Dongdong Zou, Wei Wang, Xiaowu Wang, Wenqin Tan, Qi Sui, Zhaohui Li   +9 more
doaj   +1 more source

On the ASER performance of amplify-and-forward relaying MIMO/FSO systems using SC-QAM signals over log-normal and gamma-gamma atmospheric turbulence channels and pointing error impairments

Journal of Information and Telecommunication, 2020
In this work, we analyse pointing error effects on the performance of amplify-and-forward (AF) relaying multiple-input multiple-output (MIMO) free-space optical (FSO) communication system employing sub-carrier quadrature amplitude modulation (SC-QAM ...
Duong Huu Ai, Ha Duyen Trung, Do Trong Tuan   +2 more
doaj   +1 more source

Modulation Scheme Identification Based on Artificial Neural Network Algorithms for Optical Communication System

Journal of ICT Research and Applications, 2020
Higher-order modulation schemes in optical communication systems that suffer from several impairments can use artificial intelligence (AI) algorithms, among other possible techniques, to mitigate these issues.
Mustafa A. Jalil, Jenan Ayad, Hanan J. Abdulkareem   +2 more
doaj   +1 more source