Results 91 to 100 of about 41,621 (188)
IET Image Processing, Volume 20, Issue 1, January/December 2026.This paper presents a robust reversible watermarking algorithm based on Chebyshev moments, employing a two‐stage embedding mechanism. The proposed method leverages image block partitioning to embed the copyright watermark and the reversible watermark into non‐overlapping regions located inside and outside the inscribed circle of the image, respectively.
Wenjing Sun, Ling Zhang, Hongjun Zhang
wiley +1 more source
Feedback Approach for the Relay Channel with Noisy Feedback and Its Security Analysis
EntropyRelay channels capture the essence of several important communication scenarios such as sensor network and satellite communication. In this paper, first, we propose an efficient coding scheme for an additive white Gaussian noise (AWGN) relay channel in ...
Rong Hu, Haonan Zhang, Huan Yang
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AN IMPROVED PREDICTION OF DCT-BASED IMAGE FILTERS EFFICIENCY USING REGRESSION ANALYSIS
Information and Telecommunication Sciences, 2014 Efficiency of DCT-based filters for a wide-class of images is investigated. The study is carried out for additive white Gaussian noise (AWGN) case with several intensity levels. Local DCT-based filter is used as basic denoising technique.
Oleksii S. Rubel, Volodymyr V. Lukin
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Decision-Feedback Detection Strategy for Nonlinear Frequency-Division Multiplexing
, 2018 By exploiting a causality property of the nonlinear Fourier transform, a novel decision-feedback detection strategy for nonlinear frequency-division multiplexing (NFDM) systems is introduced.
Civelli, Stella +2 more
core +1 more source
On the AWGN MAC With Imperfect Feedback [PDF]
IEEE Transactions on Information Theory, 2010 New achievable rate regions are derived for the two-user additive white Gaussian multiple-access channel with noisy feedback. The regions exhibit the following two properties. Irrespective of the (finite) Gaussian feedback-noise variances, the regions include rate points that lie outside the no-feedback capacity region, and when the feedback-noise ...
Amos Lapidoth, Michèle Wigger
openaire +1 more source
Modified CC-PEG Algorithm for Protograph-Based QC-LDPC Codes Over Non-Uniform Channel
IEEE AccessIn this paper, we propose the modified cycle-concentrating progressive-edge-growth (CC-PEG) algorithm for lifting protograph-based quasi-cyclic low-density parity-check (QC-LDPC) codes over the non-uniform additive white Gaussian noise (AWGN) channel. By
Hyeon-Bhin Lee, Jae-Won Kim
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Anti-frequency-shift packet detection for D2D power-saving communications over Wi-Fi network
Tongxin xuebao, 2016 An efficient packet detection scheme based on Wi-Fi interface was proposed.It was implemented by employing a novel normalized factor as a denominator in OFDM symbol synchronization-timing metric.Compared to the old-tradition schemes,the proposed scheme ...
Fan YANG, Xi LIANG, Ke-yu LONG, Li JIANG
doaj +2 more sources
Analisa Kinerja Pengkodean Kanal Type Reed Solomon Coding pada Kualitas Transmisi Citra
Jurnal Nasional Teknik Elektro, 2018 In the telecommunication systems, the data like audio, image, and video are transmitted to a receiver through a communication channel. However, the presence of noise and fading in the channel will degrade its performance. The degradation may cause error
Baharuddin Abbas
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On the designand performance of nonbinary LDPC codes on burst errorchannels
Tongxin xuebao, 2013 Taking structured Q -ary irregular repeat-accumulate (S-QIRA) codes as an example, the burst-error-correcting capability of QLDPC codes was analyzed preliminarily by comparison with the burst-error-correcting capability of binary LDPC codes (BLDPC)and ...
Bo ZHANG +3 more
doaj +2 more sources
Guangtongxin yanjiu, 2007 文章首先介绍了跳时超宽带（TH-UWB）信号,推导了在加性高斯白噪声（AWGN）信道条件和多径条件（MP）下,基于重叠和正交脉冲信号的系统误码率公式,并给出了仿真结果。仿真结果表明,在AWGN信道条件下,基于重叠脉冲信号的跳时二进制脉位调制（TH-BPPM）系统的性能优于基于正交脉冲信号的系统。多径条件下的正交TH-BPPM系统的性能优于AWGN信道条件下的系统性能。
王树立, 周杰, 姚克友, 王鹏
doaj