2009 43rd Annual Conference on Information Sciences and Systems最新文献

Molecular recognition as an information channel: The role of conformational changes 分子识别作为信息通道:构象变化的作用

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2010-07-26 DOI: 10.1109/CISS.2009.5054833

Y. Savir, Tsvi Tlusty

{"title":"Molecular recognition as an information channel: The role of conformational changes","authors":"Y. Savir, Tsvi Tlusty","doi":"10.1109/CISS.2009.5054833","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054833","url":null,"abstract":"Molecular recognition, which is essential in processing information in biological systems, takes place in a crowded noisy biochemical environment and requires the recognition of a specific target within a background of various similar competing molecules. We consider molecular recognition as a transmission of information via a noisy channel and use this analogy to gain insights on the optimal, or fittest, molecular recognizer. We focus on the optimal structural properties of the molecules such as flexibility and conformation. We show that conformational changes upon binding, which often occur during molecular recognition, may optimize the detection performance of the recognizer. We thus suggest a generic design principle termed ‘conformational proofreading’ in which deformation enhances detection. We evaluate the optimal flexibility of the molecular recognizer, which is analogous to the stochasticity in a decision unit. In some scenarios, a flexible recognizer, i.e., a stochastic decision unit, performs better than a rigid, deterministic one. As a biological example, we discuss conformational changes during homologous recombination, the process of genetic exchange between two DNA strands.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134234853","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

Extrinsic tree decoding 外在树解码

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-06-02 DOI: 10.1109/CISS.2009.5054754

E. Psota, L. C. Pérez

引用次数: 4

Measurement clustering criteria for localization of multiple transmitters 多发射机定位的测量聚类准则

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054742

Ahmed O. Nasif, B. L. Mark

{"title":"Measurement clustering criteria for localization of multiple transmitters","authors":"Ahmed O. Nasif, B. L. Mark","doi":"10.1109/CISS.2009.5054742","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054742","url":null,"abstract":"We consider the problem of localizing multiple cochannel transmitters belonging to a licensed or primary network using signal strength measurements taken by a group of unlicensed or secondary nodes. Traditional localization techniques can be applied to multiple transmitter localization, provided that: (1) the total number of cochannel transmitters in the system is known, and (2) an appropriate set of clustered measurements is available. In this paper, we present two criteria to determine the total number of cochannel transmitters in the primary system. The first criterion is called the net MMSE criterion, which uses the Cramér-Rao lower bound on localization accuracy. The second criterion is the information theoretic criterion, minimum description length. Both of these criteria lead to measurement clustering algorithms in a natural way. Although we consider only signal strength measurements, the approach can be generalized to include other types of observations (e.g., time and angle information) with independent measurements in additive noise. Our numerical results demonstrate the effectiveness of the proposed approach to measurement clustering.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127118584","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: 19

Wireless device identification in MIMO channels MIMO信道中的无线设备识别

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054783

Ming-Wei Liu, J. Doherty

引用次数: 6

The physical language of molecular codes: A rate-distortion approach to the evolution and emergence of biological codes 分子密码的物理语言:生物密码进化和出现的速率扭曲方法

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054834

Tsvi Tlusty

{"title":"The physical language of molecular codes: A rate-distortion approach to the evolution and emergence of biological codes","authors":"Tsvi Tlusty","doi":"10.1109/CISS.2009.5054834","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054834","url":null,"abstract":"The function of the organism hinges on the performance of its information-processing networks, which convey information via molecular recognition. Many paths within these networks utilize molecular codebooks, such as the genetic code, to translate information written in one class of molecules into another molecular “language”. The present paper examines the emergence and evolution of molecular codes in terms of ratedistortion theory and reviews recent results of this approach. We discuss how the biological problem of maximizing the fitness of an organism by optimizing its molecular coding machinery is equivalent to the communication engineering problem of designing an optimal information channel. The fitness of a molecular code takes into account the interplay between the quality of the channel and the cost of resources which the organism needs to invest in its construction and maintenance. We analyze the dynamics of a population of organisms that compete according to the fitness of their codes. The model suggests a generic mechanism for the emergence of molecular codes as a phase transition in an information channel. This mechanism is put into biological context and demonstrated in a simple example.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122736808","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: 1

Computation step-size study in digital post-compensation of fiber optic communication systems 光纤通信系统数字后补偿计算步长研究

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054849

Qun Zhang, C. Menyuk, M. I. Hayee, C. Tavva, H.-W. Huang, R. Nair, M. Khaliq

引用次数: 3

Cooperative sensing of primary users in cognitive radio networks based on message passing 基于消息传递的认知无线网络主用户协同感知

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054784

J. Lei, R. Yates, P. Spasojevic, L. Greenstein

{"title":"Cooperative sensing of primary users in cognitive radio networks based on message passing","authors":"J. Lei, R. Yates, P. Spasojevic, L. Greenstein","doi":"10.1109/CISS.2009.5054784","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054784","url":null,"abstract":"Opportunistic access to temporarily unused licensed frequency bands has been recognized as a cost-effective solution to mitigate the scarcity of radio spectrum incurred by the proliferation and evolution of wireless devices. In order to accomplish a more efficient spectrum utilization across time, space and frequency. the functionality of spectral awareness is expected to be incorporated into transceivers of cognitive radios (CR) in the foreseeable future. However, the agility requirements imposed on an individual CR might be very stringent since the spectrum has to be monitored on a continuous basis and the spectral holes must be detected reliably in the presence of channel fading and/or hardware failure, especially in a broadband wireless network with multiple primary users. To remedy this problem, light-weight collaboration among CRs becomes attractive since distributed signal processing can exploit the spatial diversity through network cooperation to improve the sensing reliability. To this end, we extend the classical framework for distributed detection of a single user to the case of multiuser detection, and introduce a Tanner graph description of the network topology. We designate the transmission pattern of primaries by a binary space-frequency signature sequence and view all possible patterns collectively as a low-density parity check (LDPC) codebook. Then, we invoke belief propagation message passing algorithm across the entire CR network to infer the unknown pattern iteratively from the noisy observations of all spectrum sensors. Based on the pattern inferred, the fusion centers can determine the spectral and spatial access pattern of secondary users, without interfering with the normal functioning of incumbent primaries.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128595792","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

Anonymous networking with localized eavesdroppers: A game-theoretic approach 具有局部窃听者的匿名网络:一种博弈论方法

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054731

P. Venkitasubramaniam, L. Tong

引用次数: 0

The Emergence of biological coding theory as a mathematical framework for modeling, monitoring, and modulating biomolecular systems 生物编码理论作为建模、监测和调节生物分子系统的数学框架的出现

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054838

E. May

引用次数: 2

Baseband estimation and compensation of joint TX/RX I/Q imbalance in SC-FDE transceivers SC-FDE收发器联合收发I/Q不平衡的基带估计与补偿

2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054781

S. Narayanan, B. Narasimhan, N. Al-Dhahir

引用次数: 13