{"title":"Network Intrusion Detection Using Flow Statistics","authors":"B. Atli, Y. Miché, Alexander Jung","doi":"10.1109/SSP.2018.8450709","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450709","url":null,"abstract":"The increasing use of network data within every aspect of human life, ranging from genetic databases to credit card payments, urges for efficient methods for detecting any attempts (intrusions) to compromise sensitive information. The problem of detecting such network intrusions is challenging, since the regular or normal network patterns are permanently changing. This paper discusses a novel intrusion detection system based on using histograms of network parameters as features which are then fed into an extreme learning machine for classifying network flows. We evaluate and compare the proposed method with existing approaches using the ISCX-IDS 2012 benchmark dataset. The numerical experiments indicate that the proposed method outperforms existing approaches by achieving an average detection rate of up to 99% while suffering a misclassification rate of only 2 %.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127132988","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}
S. Javed, Praneeth Narayanamurthy, T. Bouwmans, Namrata Vaswani
{"title":"Robust PCA and Robust Subspace Tracking: A Comparative Evaluation","authors":"S. Javed, Praneeth Narayanamurthy, T. Bouwmans, Namrata Vaswani","doi":"10.1109/SSP.2018.8450718","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450718","url":null,"abstract":"This paper provides a comparative theoretical and experimental evaluation of solutions for robust PCA and robust subspace tracking (dynamic RPCA) that rely on the sparse+lowrank matrix decomposition formulation. The emphasis is on simple and provably correct methods. Experimental comparisons are shown for video layering (separate a given video into foreground and background layer videos) which is a key first step in simplifying many video analytics and computer vision tasks, e.g., video denoising or activity recognition.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127408796","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}
{"title":"Sliding Window Based Linear Signal Detection Using 1-Bit Quantization and Oversampling for Large-Scale Multiple-Antenna Systems","authors":"Z. Shao, L. Landau, R. D. Lamare","doi":"10.1109/SSP.2018.8450809","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450809","url":null,"abstract":"Recent years, large-scale multiple-input multiple-output (MIMO) systems with low resolution analog-to-digital converters (ADCs) have been attracted much more attention. As one extreme case, 1-bit ADCs on each receive antenna can largely reduce the energy consumption and economical cost. In this work we study systems with 1-bit ADCs and oversampling at the receiver. The loss of information due to the coarse quantization can be partially recovered by the oversampled symbols. Moreover, unlike prior works we propose a sliding window based receiver, which has low computational cost but remains with high accuracy. We also present low-resolution aware zero forcing (LRA-ZF) and minimum mean square error (LRA-MMSE) receivers for the 1-bit oversampled signals. Simulation results show good performance of the system in terms of the symbol error rate.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122230467","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}
{"title":"Subspace Averaging for Source Enumeration in Large Arrays","authors":"I. Santamaría, D. Ramírez, L. Scharf","doi":"10.1109/SSP.2018.8450837","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450837","url":null,"abstract":"Subspace averaging is proposed and examined as a method of enumerating sources in large linear arrays, under conditions of low sample support. The key idea is to exploit shift invariance as a way of extracting many subspaces, which may then be approximated by a single extrinsic average. An automatic order determination rule for this extrinsic average is then the rule for determining the number of sources. Experimental results are presented for cases where the number of array snapshots is roughly half the number of array elements, and sources are well separated with respect to the Rayleigh limit.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132446407","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}
Sven Jacobsson, Yasaman Ettefagh, G. Durisi, Christoph Studer
{"title":"All-Digital Massive Mimo With a Fronthaul Constraint","authors":"Sven Jacobsson, Yasaman Ettefagh, G. Durisi, Christoph Studer","doi":"10.1109/SSP.2018.8450779","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450779","url":null,"abstract":"We analyze the uplink and downlink rates achievable in an all-digital massive multiple-input multiple-output system in which the base station (BS) is equipped with low-precision analog-to-digital and digital-to-analog converters, the size of the antenna array is limited, and there is a bandwidth constraint on the fronthaul link connecting the remote radio head to the digital baseband processing unit at the BS. Our results show that, at low SNR, it is better to use antenna arrays with many antenna elements, each one connected to low-precision converters, because this yields a beneficial array gain. On the contrary, at high SNR, it is better to reduce the number of active antenna elements, but increase the precision of the converters connected to them, because this allows one to separate more easily the data streams of the different users with simple linear baseband processing techniques.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"4 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131637579","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}
F. Giannetti, M. Moretti, R. Reggiannini, A. Petrolino, G. Bacci, E. Adirosi, L. Baldini, L. Facheris, S. Melani, A. Ortolani
{"title":"The Potential of Smartlnb Networks for Rainfall Estimation","authors":"F. Giannetti, M. Moretti, R. Reggiannini, A. Petrolino, G. Bacci, E. Adirosi, L. Baldini, L. Facheris, S. Melani, A. Ortolani","doi":"10.1109/SSP.2018.8450692","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450692","url":null,"abstract":"NEFOCAST is a research project that aims at retrieving rainfall fields from channel attenuation measurements on satellite links. Rainfall estimation algorithms rely on the deviation of the measured Es/N0 from the clear-sky conditions. Unfortunately, clear-sky measurements exhibit signal fluctuations (due to a variety of causes) which could generate false rain detections and reduce estimation accuracy. In this paper we first review the main causes of random amplitude fluctuations in the received Es/N0, and then we present an adaptive tracking algorithm based on two Kalman filters: one that tracks slow changes in Es/N0 due to external causes and another which tracks fast Es/N0 variations due to rain. A comparison of the outputs of the two filters confirms the reliability of the rainfall rate estimate.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"645 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122957763","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}
{"title":"Distributed Particle Metropolis-Hastings Schemes","authors":"Luca Martino, V. Elvira, Gustau Camps-Valls","doi":"10.1109/SSP.2018.8450763","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450763","url":null,"abstract":"We introduce a Particle Metropolis-Hastings algorithm driven by several parallel particle filters. The communication with the central node requires the transmission of only a set of weighted samples, one per filter. Furthermore, the marginal version of the previous scheme, called Distributed Particle Marginal Metropolis-Hastings (DPMMH) method, is also presented. DPMMH can be used for making inference on both a dynamical and static variable of interest. The ergodicity is guaranteed, and numerical simulations show the advantages of the novel schemes.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127862954","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}
Sutanoy Dasgupta, D. Pati, Ian H. Jermyn, Anuj Srivastava
{"title":"Shape-Constrained and Unconstrained Density Estimation Using Geometric Exploration","authors":"Sutanoy Dasgupta, D. Pati, Ian H. Jermyn, Anuj Srivastava","doi":"10.1109/SSP.2018.8450768","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450768","url":null,"abstract":"The problem of nonparametrically estimating probability density functions (pdfs) from observed data requires posing and solving optimization problems on the space of pdfs. We take a geometric approach and explore this space for optimization using actions of a time-warping group. One action, termed area preserving, is transitive and is applicable to the case of unconstrained density estimation. In this case, we take a two-step approach that involves obtaining any initial estimate of the pdf and then transforming it via this warping action to reach the final estimate by maximizing the log-likelihood function. Another action, termed mode-preserving, is useful in situations where the pdf is constrained in shape, i.e. the number of its modes is known. As earlier, we initialize the estimation with an arbitrary element of the correct shape class, and then search over all time warpings to reach the optimal pdf within that shape class. Optimization over warping functions is performed numerically using the geometry of the group of warping functions. These methods are illustrated using a number of simulated examples.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121184177","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}
Santiago Segarra, A. Marques, Mohak Goyal, Samuel Rey-Escudero
{"title":"Network Topology Inference From Input-Output Diffusion Pairs","authors":"Santiago Segarra, A. Marques, Mohak Goyal, Samuel Rey-Escudero","doi":"10.1109/SSP.2018.8450838","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450838","url":null,"abstract":"We consider a scenario where a steady network state (output graph signal) has been generated by an initial network state (input graph signal) locally diffused through the edges of the network according to an auto-regressive and/or moving average dynamics of order one. The input graph signal can represent, for example, an initial opinion profile and the output the consensus opinion formed after individuals exchange their views with their friends. For that scenario, we analyze how a set of input-output pairs (each corresponding to a different opinion cascade) can be used to infer the topology of the underlying graph. The problem is formulated as a least squares minimization augmented with topological constraints, which include sparsity on the graph edges. While the original network recovery problem is non-convex, suitable convex relaxations along with theoretical recovery guarantees are presented. We first look at the case where all input-output pairs have been generated with the same graph but the diffusion coefficients for each observation are different. We then discuss the case where the graphs are related but not exactly the same. Numerical tests showcase the effectiveness of the proposed algorithms in recovering different types of networks with synthetic signals.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128715597","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}
{"title":"Adaptive Period Estimation For Sparse Point Processes","authors":"Hans-Peter Bernhard, A. Springer","doi":"10.1109/SSP.2018.8450856","DOIUrl":"https://doi.org/10.1109/SSP.2018.8450856","url":null,"abstract":"In this paper, adaptive period estimation for time varying sparse point processes is addressed. Sparsity results from signal loss, which reduces the number of samples available for period estimation. We discuss bounds and minima of the mean square error of fundamental period estimation suitable in these situations. A ruleset is derived to determine the optimum memory length which achieves the minimum estimation error. The used low complex adaptive algorithm operates with variable memory length N to fit optimally for the recorded time varying process. The algorithm is of complexity $3mathcal {O}(N)$, in addition to that the overall complexity is reduced to $3mathcal {O}(1)$, if a recursive implementation is applied. This algorithm is the optimal implementation candidate to keep synchronicity in industrial wireless sensor networks operating in harsh and time varying environments.","PeriodicalId":330528,"journal":{"name":"2018 IEEE Statistical Signal Processing Workshop (SSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128761366","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}