Xiang‐Yang Li · Cambridge University Press eBooks · 2008
In Chapter 4, we basically studied how to assign time slots to links such that the simultaneous transmissions will be interference-free. In Chapter 5, we studied how to assign frequency channels to wireless terminals such that (1) they are interference-free; i.e., the spectrums assigned to nearby terminals will be disjoint; or (2) the links formed by the assigned channels will form a network with certain networking properties such as being connected. In this chapter, we study the channel assignment to wireless networks when the channels are defined by CDMA codes.
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Yihai Zhu · Figshare · 2019
CNN code for Winter Jujube Disease Recognition
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Yihai Zhu · Figshare · 2019
CNN code for Winter Jujube Disease Recognition
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Tan, Narciso L. (author) · University of Southern California Digital Library · 2015
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Fredrik Maimsten, Tony Ottosson, Erik G. Ström · 2007
this paper. New estimator proposal The output of the intermediate encoder, for one data bit, is regarded as a set of independent nuisance parameters but, it is actually based on one single bit. Thus, if also the memory of the code is taken into account, the estimator performance will improve
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Luyao Ma, Lijun Zhang · 2021
Both polar code and Low-Density Parity-Check (LDPC) code have been adopted in 3GPP eMBB scenario. Some scholars have proposed a serial concatenation structure combining these two codes. However, the inner code needs to add redundant bits to protect the redundant bits of the outer code in the serial concatenation. In this paper, we propose a parallel concatenation code combining polar code and LDPC code on the AWGN channel, which does not distinguish the inner code from the outer code. In the proposed concatenated structure, the BP algorithm is used to decode polar code, and the output soft information of BP decoder is logarithmically processed before LDPC decoding. According to the simulation results, compared with the serial concatenated code with the same code rate and code length, the parallel concatenated code has better BER(Bit-Error-Rate) performance.
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Burns, Helen · Zenodo (CERN European Organization for Nuclear Research) · 2019
The code for Diabatic Eddies in the Southern Ocean, H. Burns 2018 Thesis Contains: MITgcm Setup Python Tools for MITgcm data Python analysis Documentation: [See GitHub Wiki]
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신경대학교 인터넷정보통신학과, Ju-Yong Park, Jeong-Su Kim et al. · The Journal of The Institute of Internet Broadcasting and Communication · 2015
This paper presents 3-User NOR switching channel based on interference decoding with receiver in succession to Jong Nang channel code I, II. The Jeju Jong Nang code is considered as one of the earliest human binary coded communication (HBCC) in the world with a definite 1 or 0 binary symbolic analysis of switching circuits. In this paper, we introduce a practical example of interference decoding with receiver cooperation based on the three user Jong Nang NOR switching channel. The proposed system models are the three user Jong Nang (TUJN) NOR logic switching on-off, three-user injective deterministic NOR switching channel and Gaussian interference channel (GIC) with receiver cooperation. Therefore, this model is well matched to Shannon binary symmetric and erasure channel capacity. We show the applications of three-user Gaussian interference decoding to obtain deterministic channels which means each receiver cooperation helps to adjacent others in order to increase degree of freedom. Thus, the optimal sum rate of interference mitigation through adjacent receiver cooperation achieves 7 bits.
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Burns, Helen · Figshare · 2019
The code for Diabatic Eddies in the Southern Ocean, H. Burns 2018 Thesis Contains: MITgcm Setup Python Tools for MITgcm data Python analysis Documentation: [See GitHub Wiki]
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Martin Weise · Zenodo (CERN European Organization for Nuclear Research) · 2021
Benchmark results of the QR-Code Optical Covert Channel existing in the reference implementation of a open-source secure data infrastructure and processes.
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Martin Weise · Zenodo (CERN European Organization for Nuclear Research) · 2021
Benchmark results of the QR-Code Optical Covert Channel existing in the reference implementation of a open-source secure data infrastructure and processes.
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В. В. Макаров · Measurement Techniques · 2011
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Arnab Chakrabarti · Rice Digital Scholarship Archive (Rice University) · 2007
The design of wireless communication networks is based on the premise that networks are collections of reliable point-to-point links between communicating nodes. Such a communication model, although simple, is inefficient because wireless propagation is not point-to-point in nature. It is more efficient for nodes to share their resources by cooperating at the symbol level to forward each other's physical layer packets collectively to the destination. The improved paradigm is known as cooperative communication. My work develops practical coding techniques that approach the theoretical limits of cooperation predicted by information theory.\nCooperative strategies, often called relay protocols, describe the processing performed by the information forwarding (relaying) nodes. My research proposes implementable schemes for two relay protocols - decode-and-forward and estimate-and-forward. In each case, the starting point is an optimal but non-constructive information theoretic random coding scheme, which motivates a practical code construction. Novel code design princi ples and some surprising insights emerge from this work of research. The performance of the each scheme developed here is found to approach theoretical limits.\nFor decode-and-forward relaying, we propose dual-rate low-density parity-check (LDPC) codes. In our designs, the source transmission is decoded with the help of side information in the form of additional parity bits from the relay. The key challenge is to discover codes that simultaneously perform well for the source-relay and the source-destination links. The asymptotic noise thresholds of the discovered relay code profiles are a fraction of a decibel away from the achievable lower bound for decode-and-forward relaying. With random component LDPC codes, the overall relay coding scheme performs within 1.2 dB of the theoretical limit.\nIn estimate-and-forward relaying, the key challenge is to form a quantized estimate of the source transmission from the received signal at the relay. We illustrate with an example that the existing approach of distortion minimization at the relay is suboptimal. We derive an improved quantizer design criterion based on rate-constrained mutual information maximization between the source transmission and the quantizer output, using which, we obtain performance less than 0.9 dB from the achievable rate at a BER of 10-4.
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Moon Ho Lee, Md. Hashem Ali Khan, Ju Yong Park · Journal of the Institute of Electronics and Information Engineers · 2012
"제주 정낭 Code I"에서는 배경과 역사 그리고 물리적 의미에 대해 알아보았고, 본 논문에서는 디지털 휴먼 이진 코드인 한국의 제주도 전통에서 나무문으로 쓰인 정낭 정보통신의 뿌리를 소개하면서 AWGN 모델과 비슷한 정낭 결정 채널 모델을 조사하고, 채널 용량 분석에 접근하는 결정적 모델을 찾는 것을 목표로 한다. 또한 이 분석은 AWGN 모델의 용량에 대한 이해를 제공한다. 정낭 정보통신은 가족의 행방을 전달 위해 세 구멍으로 두 수직 돌에 3개의 서까래를 놓은 것으로 결정적인 신호이다. 따라서 정낭 채널 코드는 이동통신 기지국간 Backhaul에 사용됨을 보인다. We had introduced the backgrounds, history and physical meanings of Jong Nang in "Jeju Jong Nang Channel Code I". In this paper, we introduce practical the root of digital human binary coded Jong Nang communications as the wooden gate in Korea Jeju Island custom. We investigate Jong Nang gatemodels as an approximation of the AWGN model. The objective is to find a deterministic model, which is accessible to capacity analysis. Furthermore, this analysis should provide insights on the capacity of the AWGN model. Motivated by backhaul cooperation in cellular networks where cooperation is among base stations, we term the interference channel with conferencing transmitters. Jong Nang communicationsis normal 3 rafters placed on two vertical stones with three holes to convey the family's whereabouts that is deterministic signal, nowadays it is applied to backhaul in mobile base station and traffic signal.
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Kamat, P. S. · CSUN ScholarWorks (California State University, Northridge) · 1985
This thesis develops the theory of linear multistate sequences using the theory of linear binary sequences.The correlation function of multistate sequences and some of its properties important to the generation of channel sounding signals are then constructed.These cor~elation properties are used to develop the power spectral density signals which have been encoded with multi-state sequences.The userfriendly computer program is then developed which allows the user to enter, generate and correlate up to nine 8-state sequences of periods up to 512.This program also has the flexibility of various mappings which control how correlation is computed.vi
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Minoru Kuribayashi · Lecture notes in computer science · 2010
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Moon Ho Lee · Journal of the Institute of Electronics and Information Engineers · 2012
디지털 통신의 기원인 정낭(입구대문(入口大門))이 1234년부터 제주도에서 사용되어왔다. 정낭은 집의 입구에 서까래 크기 나무 3개를 돌기둥에 삽입해 집안에 사람이 있는지 유무를 알리는 통신 방식이다. 본 논문에서는 정낭의 논리적 분석을 하고 정낭 채널에 오류를 분석한다. 정낭이 잘못 놓았을 때 오류를 분석하는데 통신 시스템이 이진 대칭 채널과 비교하고, NOR 채널에서 채널 용량이 샤논 이론에 접근하는 것을 보인다. In this paper, we look into a Jong Nang Channel which is the origin of digital communications and has been used in Jeju Island since AD 1234. It is one kind of communication ways which informs people of whether a house owner is in one's house or not using its own protocol. It is comprised of three timber and two stone pillars whose one side has three holes respectively. In this paper, we analyze the Jong-Nang Channel both in the light of logic and bit error probability. In addition, we compare it with a conventional binary erasure channel when some errors occur over them respectively. We also show that a capacity of NOR channel approaches Shannon limit.
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Martin Weise · Zenodo (CERN European Organization for Nuclear Research) · 2021
Benchmark results of the QR-Code Optical Covert Channel existing in the reference implementation of a open-source secure data infrastructure and processes.
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Alena Morávková · Digital Repository (National Repository of Grey Literature) · 2017
The aim of this thesis is to find out to what extent DVTV Internet TV speakers adhere to Literary Czech in each interview they perform and under which circumstances they do not. We also wanted to contribute to the answers to the question, whether it is appropriate to think about the transition from the current concept of Literary Czech to Standard Czech. During the interview analysis, we monitored the rate of occurrence of the non-standard elements, the influence of the speaker's role in the interview, and selected sociolinguistic factors which have influence on the choice of language code. We compared the results with the research of other journalistic interviews and with the corpus data from the Common Czech. The examined material consisted of 30 interviews from January to February 2016. We found out that some of the interviewed people tended to use Literary Czech, some were speaking non-standard Czech and there were also people whose speech was in terms of the occurrence of Literary and non-standard elements rather mixed. Nevertheless, in general, the character of the texts was rather literary. Based on a comparison of the results with other research, we came to the conclusion that the transition from Literary Czech to Standard Czech would be premature, as the speakers are able to comply with...
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Borui Yang, Wei Li, Liyao Xiang et al. · 2024
The expansion of the open source community and the rise of large language models have raised ethical and security concerns on the distribution of source code, such as misconduct on copyrighted code, distributions without proper licenses, or misuse of the code for malicious purposes. Hence it is important to track the ownership of source code, in which watermarking is a major technique. Yet, drastically different from natural languages, source code watermarking requires far stricter and more complicated rules to ensure the readability as well as the functionality of the source code. Hence we introduce SrcMarker, a watermarking system to unobtrusively encode ID bitstrings into source code, without affecting the usage and semantics of the code. To this end, SrcMarker performs transformations on an AST-based intermediate representation that enables unified transformations across different programming languages. The core of the system utilizes learning-based embedding and extraction modules to select rule-based transformations for watermarking. In addition, a novel feature-approximation technique is designed to tackle the inherent non-differentiability of rule selection, thus seamlessly integrating the rule-based transformations and learning-based networks into an interconnected system to enable end-to-end training. Extensive experiments demonstrate the superiority of SrcMarker over existing methods in various watermarking requirements.
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