A5037563840- Error Correcting Code Techniques
- Advanced Wireless Communication Techniques
- Wireless Communication Security Techniques
- DNA and Biological Computing
- Cooperative Communication and Network Coding
- Coding theory and cryptography
- Advanced MIMO Systems Optimization
- Advanced Data Storage Technologies
- Image Processing Techniques and Applications
- Peer-to-Peer Network Technologies
- Caching and Content Delivery
- Algorithms and Data Compression
- Advanced Wireless Network Optimization
- Wireless Communication Networks Research
- User Authentication and Security Systems
- Drilling and Well Engineering
- Chaos-based Image/Signal Encryption
- Neural Networks and Applications
- Gear and Bearing Dynamics Analysis
- Imbalanced Data Classification Techniques
- Autonomous Vehicle Technology and Safety
- Advanced Wireless Communication Technologies
- Semiconductor materials and devices
- Machine Learning and Data Classification
- Piezoelectric Actuators and Control
Samsung (South Korea)
2014-2025
Sungkyunkwan University
2010-2024
Pohang University of Science and Technology
2022
Dongguk University
2012
Dacom (Netherlands)
2003
The recent revolution in handheld computing with high-speed cellular network made mobile processors have multi-cores and powerful 3D graphic engines that support FHD (1920×1080) or even higher resolutions. Consequently, the memory bandwidth requirement has also been increasing, requiring a next-generation DRAM standard. In this paper, we present power-efficient LPDDR4 SDRAM operating at 3.2Gb/s/pin. Our offers 2× improved power efficiency over LPDDR3 SDRAM's, due to 2-channel architecture...
In this paper, we investigate the fundamentals of puncturing and shortening for polar codes, based on binary domination. For punctured shortened prove that partial order by domination completely determines both incapable bit patterns (by puncturing) fixed shortening). particular, give a necessary sufficient condition an encoder output to be additionally single input bit, as well made bit. We also identify all yielding given pattern. These results provide guidance design practical...
A new simplified structure of bit-interleaved coded modulation (BICM) for second generation digital video broadcasting (DVB) standards, such as DVB-T2, DVB-C2, and DVB-NGH is proposed. In the BICM DVB parity column-twist interleavers are employed in order to avoid possible performance degradation due structural weaknesses scheme. this paper, a method proposed finding permutation-equivalent low-density parity-check codes that eliminate without interleaver, thereby simplifying standards. The...
An integer-forcing (IF) linear multiple-input multiple-output (MIMO) receiver has recently been proposed, which is theoretically shown to achieve near capacity with almost the same complexity as that of conventional receivers. The key idea attempts directly decode integer-linear combinations codewords. To ensure this sum-decoding operation feasible, in previous works, lattice codes over <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">...
This paper presents density evolution (DE) techniques based on reciprocal channel approximation (RCA) for general bit-interleaved coded modulation (BICM) systems. The original RCA-based DE (RCA-DE) technique is implemented under the assumption of binary-input additive white Gaussian noise channels (BI-AWGNCs). In BICM systems, however, <inline-formula> <tex-math notation="LaTeX">$M$ </tex-math></inline-formula>-ary schemes are generally used, and they can be regarded as to a parallel...
We propose a method for constructing rate-adaptive low-density parity check (LDPC) codes with large girth by syndrome merging progressive-edge-growth (PEG) algorithm. Proposed scheme has different structure from LDPC accumulate (LDPCA) codes. As result, the new construction turns up each specific code, and eliminates error floor.
In the conventional successive cancellation (SC) decoder for polar codes, all future bits to be estimated later are treated as random variables. However, codes inevitably involve frozen bits, and their concatenated coding schemes also include parity (or dynamic bits) causally generated from past earlier. We refer located behind a target decoding bit its <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">future constraints (FCs)</i> . Although...
The belief propagation (BP) decoding of short low-density parity check codes suffers from cycles and trapping sets. A number perturbation schemes have been proposed to overcome the limitation. This letter presents a generalized framework for multi-round BP with input proposes an improved scheme. In particular, impulsive which is applied only few symbols proposed, along new space selection criterion. scheme performs better than existing at lower complexity supports parallel implementation.
In this letter, we consider binary low density parity check accumulate (LDPCA) codes with source revealing rate-adaptation for distributed coding (DSC) applications. We propose an effective algorithm selecting symbols to the revealing. Numerical results demonstrate that proposed scheme significantly outperforms conventional LDPCA in high compression rate region asymmetric DSC systems.
The effect of imperfect channel state information (CSI) on rate adaptation in time-varying multi-antenna fading channels is studied. In the presence feedback delay and estimation error, we analyze outage probability (OP), defined as average that achievable current lower than data scheduled based outdated feedback, for maximum ratio combining receivers single-input multiple-output zero-forcing (ZF) multiple-input (MIMO) channels. particular, temporally correlated MIMO channels, conditional...
In this paper, a new non-orthogonal multiple-access scheme, trellis tone modulation (TTMMA), is proposed for peer discovery of distributed device-to-device (D2D) communication. The range and capacity are important performance metrics in discovery. uses single-tone transmission achieves long due to its low Peak-to-Average Power Ratio (PAPR). TTMMA also exploits resource assignment increase the capacity. For multi-user detection superposed signals, message-passing algorithm with supplementary...
In blind detection, the user equipment attempts to decode a set of candidate groups find its own control information. False alarm (FA) refers an event in which decoding is successful even though signal not transmitted, and one several critical issues occurring detection problem. For CRC-aided polar code, with limited number CRC bits, FA occurs when check passes there no signal. this paper, we propose technique efficiently reduce events using two metrics are specially suited low rate high...
Concatenated polar codes under successive cancellation list (SCL) decoding have excellent error-correction performance. However, their expected error-detection capability becomes degraded, when we increase the size of SCL decoder in order to improve In this paper, propose a configuration design scheme for and post-decoding validation check provide better tradeoff between Firstly, is designed its own error detection capability. Specifically, part dynamic frozen bits (also called parity-check...
Shaped polar codes were recently proposed to improve the spectral efficiency of coded modulation, based on probabilistic shaping. The key principle for them is adjust probability occurrence 1's in each codeword by introducing shaping bits, which makes distribution modulated symbols close Gaussian distribution. But, they have a serious problem from practical viewpoint, since additional decoding required determine bits. In this paper, we investigate an algebraic approach design structurally...
The application of polar coding to rate-adaptive asymmetric Slepian-Wolf is considered. encoder transmits the syndrome set which includes high entropy bits decoder achieve optimal compression. It means that must know correlation between two sources and varies according this correlation. In paper, we propose source scheme with construction designed by density evolution for target range crossover probabilities from 0.01 0.25. This proposed performs closely theoretical Slepian Wolf bound can be...
In this paper, we propose a new Distributed Source Coding (DSC) scheme based on Low-Density Parity-Check (LDPC) codes with source revealing rate-adaptation. This consists of LDPC which are well designed at their respective operating rates. The member do not need to be any rate-adaptation criterion. Instead, when decoding fails, method is used. Numerical results show that the proposed performs within average 5.6% Slepian-Wolf bound over entire compression rate region. complexity also...
In this paper, we introduce new attributes of low-density parity-check graphs, degree-set and degree-sum, which explains the connectivity a check node with more detail. Then, consider specified ensembles defined by degree-set/sum distribution graph than one degree distribution. As set/sum varies, tradeoff between performance at waterfall that error-floor is observed. The trade-off point can be managed controlling
First, the diversity analysis method based on Boolean approximation is proposed when a polar-codeword transmitted over multiple fading blocks. Using tool, decoding order for polar codes and channel mapping can be evaluated block bit allocation optimized. Then we propose novel interleaving that achieves full at rate 0.5 two-fading-block case. The outperforms conventional interleavers including triangular interleaver of 5G new radio in terms rate.
Advanced Packaging Tool (APT) is a package manager used in Debian Linux distributions. By default, APT configured to use the official central repository, but it also allows users modify and add alternative repositories easily. Since using geographically closer servers can boost download speed, many adopt mirror sites their country instead of default repository. However, often challenging for select an appropriate site. First, have change repository URL manually with insufficient information...
In this paper, we analyze the effects of imperfect channel state information (CSI) on outage performance linear zero-forcing (ZF) receiver in time-varying multiple-input multiple-output (MIMO) fading channels. Accurate CSI is an essential condition to improve overall rate-adaptive MIMO system. However, acquiring perfect at transceivers impossible due feedback delay and estimation error. To investigate environments, therefore, probability approximated by deriving density function output...