2014 Information Theory and Applications Workshop (ITA)最新文献

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On code design for simultaneous energy and information transfer 能量与信息同时传递的代码设计
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804257
Anshoo Tandon, M. Motani, L. Varshney
{"title":"On code design for simultaneous energy and information transfer","authors":"Anshoo Tandon, M. Motani, L. Varshney","doi":"10.1109/ITA.2014.6804257","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804257","url":null,"abstract":"We consider the problem of binary code design for simultaneous energy and information transfer where the receiver completely relies on the received signal for fulfilling its real-time power requirements. The receiver, in this scenario, would need a certain amount of energy (derived from the received signal) within a sliding time window for its continuous operation. In order to meet this energy requirement at the receiver, the transmitter should use only those codewords which carry sufficient energy. In this paper, we assume that the transmitter uses on-off keying where bit one corresponds to transmission of a high energy signal. The transmitter uses only those codewords which have at least d ones in a sliding window of W = d + 1 bits. We show that with this constraint, the noiseless code capacity is achieved by sequences generated from a finite state Markov machine. We also investigate achievable rates when such constrained codes are used on noisy communication channels. Although a few of these results are well known for run-length limited codes used for data storage, they do not seem to appear in literature in the form presented here.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114014567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
Low complexity encoding algorithm of RS-based QC-LDPC codes 基于rs的QC-LDPC码低复杂度编码算法
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804249
Mu Zhang, Li Tang, Qin Huang, Zulin Wang
{"title":"Low complexity encoding algorithm of RS-based QC-LDPC codes","authors":"Mu Zhang, Li Tang, Qin Huang, Zulin Wang","doi":"10.1109/ITA.2014.6804249","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804249","url":null,"abstract":"This paper presents a novel encoding algorithm for QC-LDPC codes constructed from Reed-Solomon codes. The encoding is performed in the transform domain via Galois Fourier transformation. Message bits are encoded in sections corresponding to sub-matrices of the parity-check matrix in the transform domain. Because of the structure of the parity-check matrices of these LDPC codes, the encoding can be easily implemented with some linear-feedback shift registers, thus efficiently reduces the hardware cost.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116028294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
An asymptotic approximation of the ISI channel capacity ISI信道容量的渐近逼近
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804211
G. Taricco, J. Boutros
{"title":"An asymptotic approximation of the ISI channel capacity","authors":"G. Taricco, J. Boutros","doi":"10.1109/ITA.2014.6804211","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804211","url":null,"abstract":"An asymptotic method to calculate the information rate of an ISI channel is presented in this work. The method is based on an integral representation of the mutual information, which is then calculated by using a saddlepoint approximation along with an asymptotic expansion stemming from the Hubbard-Stratonovich transform. This asymptotic result is evaluated repeatedly to generate a large number of samples required for the Monte-Carlo approximation of the final result. The proposed method has the advantage of being manageable even when the channel memory becomes very large since the complexity grows with polynomial order in the memory length.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116245252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
On the capacity of HetNets 关于HetNets的容量
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804260
S. Hanly, P. Whiting
{"title":"On the capacity of HetNets","authors":"S. Hanly, P. Whiting","doi":"10.1109/ITA.2014.6804260","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804260","url":null,"abstract":"Heterogeneous wireless networks provide a means to increase network capacity by introducing small cells and adopting a layered architecture. These networks allocate resources flexibly through a combination of time sharing and cell range expansion/contraction allowing a wide range of possible schedulers. In this paper we define capacity of such networks in terms of the maximum number of downloads per second which can be achieved for a given offered traffic density. In a simplified model we show that this capacity is determined via the solution to a continuous linear program (LP). If the solution is smaller than 1 then we show that there is a scheduler such that the number of mobiles in the network has ergodic properties with finite limiting moments. On the other hand if the solution is greater than 1 then we show that no such scheduler exists.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128767461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Low complexity power and scheduling policies for wireless networks to provide quality of service 低复杂度的功率和调度策略为无线网络提供高质量的服务
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804250
V. Kumar, V. Sharma
{"title":"Low complexity power and scheduling policies for wireless networks to provide quality of service","authors":"V. Kumar, V. Sharma","doi":"10.1109/ITA.2014.6804250","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804250","url":null,"abstract":"We consider optimal power allocation policies for a single server, multiuser system. The power is consumed in transmission of data only. The transmission channel may experience multipath fading. We obtain very efficient, low computational complexity algorithms which minimize power and ensure stability of the data queues. We also obtain policies when the users may have mean delay constraints. If the power required is a linear function of rate then we exploit linearity and obtain linear programs with low complexity.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132283487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Zeta functions of finite-type-Dyck shifts are N-algebraic 有限型dyck位移的Zeta函数是n代数的
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804286
Marie-Pierre Béal, Michel Blockelet, C. Dima
{"title":"Zeta functions of finite-type-Dyck shifts are N-algebraic","authors":"Marie-Pierre Béal, Michel Blockelet, C. Dima","doi":"10.1109/ITA.2014.6804286","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804286","url":null,"abstract":"Constrained coding is a technique for converting unrestricted sequences of symbols into constrained sequences, i.e. sequences with a predefined set of properties. Regular constraints are described by finite-state automata and the set of bi-infinite constrained sequences are finite-type or sofic shifts. A larger class of constraints, described by sofic-Dyck automata, are the visibly pushdown constraints whose corresponding set of biinfinite sequences are the sofic-Dyck shifts. An algebraic formula for the zeta function, which counts the periodic sequences of these shifts, can be obtained for sofic-Dyck shifts having a right-resolving presentation. We extend the formula to all sofic-Dyck shifts. This proves that the zeta function of all sofic-Dyck shifts is a computable Z-algebraic series. We prove that the zeta function of a finite-type-Dyck shift is a computable N-algebraic series, i.e. is the generating series of some unambiguous context-free language. We conjecture that the result holds for all sofic-Dyck shifts.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129516072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Experiences building network-coding-based distributed storage systems 有构建基于网络编码的分布式存储系统的经验
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804234
P. Lee
{"title":"Experiences building network-coding-based distributed storage systems","authors":"P. Lee","doi":"10.1109/ITA.2014.6804234","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804234","url":null,"abstract":"Large-scale distributed storage systems are prone to node failures. To provide fault tolerance, data is often encoded to maintain data redundancy over multiple storage nodes. If a node fails, it can be repaired by downloading data from surviving nodes and regenerating the lost data in a new node. Network coding has recently been proposed (e.g., see [2]) to generate data redundancy. It is shown that network coding can minimize the amount of data being transferred for repair, while maintaining the same fault tolerance as in conventional erasure coding schemes. Its idea is to have storage nodes first encode their stored data and then send the encoded data for regeneration. On the other hand, the topic of network coding in storage systems is mostly investigated in theoretical studies. Its performance in real deployment remains an open issue. This motivates us to study the practicality of deploying network coding in real-world distributed storage systems. We highlight two of our implementation projects of network-coding-based storage systems at the Chinese University of Hong Kong, namely NCCloud and CORE. Both of them target different storage applications, while building on network coding to enable high availability and efficient recovery of storage systems.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114968422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Efficient homomorphic encryption on integer vectors and its applications 整数向量的高效同态加密及其应用
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804228
Hongchao Zhou, G. Wornell
{"title":"Efficient homomorphic encryption on integer vectors and its applications","authors":"Hongchao Zhou, G. Wornell","doi":"10.1109/ITA.2014.6804228","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804228","url":null,"abstract":"Homomorphic encryption, aimed at enabling computation in the encrypted domain, is becoming important to a wide and growing range of applications, from cloud computing to distributed sensing. In recent years, a number of approaches to fully (or nearly fully) homomorphic encryption have been proposed, but to date the space and time complexity of the associated schemes has precluded their use in practice. In this work, we demonstrate that more practical homomorphic encryption schemes are possible when we require that not all encrypted computations be supported, but rather only those of interest to the target application. More specifically, we develop a homomorphic encryption scheme operating directly on integer vectors that supports three operations of fundamental interest in signal processing applications: addition, linear transformation, and weighted inner products. Moreover, when used in combination, these primitives allow us to efficiently and securely compute arbitrary polynomials. Some practically relevant examples of the computations supported by this framework are described, including feature extraction, recognition, classification, and data aggregation.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115482515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 77
Parallel algorithms for addition in non-standard number systems 非标准数字系统中的并行加法算法
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804265
Christiane Frougny, P. Heller, E. Pelantová, Milena Svobodová
{"title":"Parallel algorithms for addition in non-standard number systems","authors":"Christiane Frougny, P. Heller, E. Pelantová, Milena Svobodová","doi":"10.1109/ITA.2014.6804265","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804265","url":null,"abstract":"In 1961 Avizienis proposed a parallel algorithm for addition in base 10 with digit set A = {-6, -5, ..., 5, 6}. Such an algorithm performs addition in constant time, independently of the length of the representation of the summands. In computer arithmetic parallel addition is used for speeding up multiplication and division algorithms. In this work we consider number systems where the base is a complex number β such that |β| > 1. We show that we can find a set of signed-digits on which addition is realizable by a parallel algorithm if and only if β is an algebraic number with no conjugate of modulus 1. We then address the question of the size of the digit set that permits parallel addition. We also investigate block parallel addition.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"387 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115990464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A continuum limit for non-dominated sorting 非支配排序的连续统极限
2014 Information Theory and Applications Workshop (ITA) Pub Date : 2014-04-24 DOI: 10.1109/ITA.2014.6804207
J. Calder, S. Esedoglu, A. Hero
{"title":"A continuum limit for non-dominated sorting","authors":"J. Calder, S. Esedoglu, A. Hero","doi":"10.1109/ITA.2014.6804207","DOIUrl":"https://doi.org/10.1109/ITA.2014.6804207","url":null,"abstract":"Non-dominated sorting is an important combinatorial problem in multi-objective optimization, which is ubiquitous in many fields of science and engineering. In this paper, we overview the results of some recent work by the authors on a continuum limit for non-dominated sorting. In particular, we have discovered that in the (random) large sample size limit, the non-dominated fronts converge almost surely to the level sets of a function that satisfies a Hamilton-Jacobi partial differential equation (PDE). We show how this PDE can be used to design a fast, potentially sublinear, approximate non-dominated sorting algorithm, and we show the results of applying the algorithm to real data from an anomaly detection problem.","PeriodicalId":338302,"journal":{"name":"2014 Information Theory and Applications Workshop (ITA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132642511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
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