Now showing items 533-552 of 1136

    • LDPC Code-Design for the Relay Channel 

      Chakrabarti, Arnab; de Baynast, Alexandre; Sabharwal, Ashutosh; Aazhang, Behnaam (2006-06-01)
      We propose LDPC code designs for the half-duplex relay channel. Our designs are derived from the information theoretic random coding scheme for decode-and-forward relaying. An important advantage of our scheme is that it ...
    • Learning minimum volume sets with support vector machines 

      Davenport, Mark A.; Baraniuk, Richard G.; Scott, Clayton D. (2006-09-01)
      Given a probability law P on d-dimensional Euclidean space, the minimum volume set (MV-set) with mass beta , 0 < beta < 1, is the set with smallest volume enclosing a probability mass of at least beta. We examine the use ...
    • Lifting Construction of Non-Linear Wavelet Transforms 

      Claypoole, Roger L.; Baraniuk, Richard G.; Nowak, Robert David (1998-10-01)
      This paper analyzes non-linear wavelet transforms using the lifting construction. The lifting construction exploits a spatial-domain, prediction-error interpretation of the wavelet transform and provides a powerful framework ...
    • A Limitation of the Kernel Method for Joint Distributions of Arbitrary Variables 

      Baraniuk, Richard G. (1996-02-01)
      Recently, Cohen has proposed a construction for joint distributions of arbitrary physical quantities, in direct generalization of joint time-frequency representations. Actually this method encompasses two approaches, one ...
    • The Limiting Density of a Nonlinear System 

      Papantoni-Kazakos, P.; Kazakos, D. (1974-10-20)
      The RC filter-hard limiter-RC filter nonlinear system shown in Fig. 1 is the subject of this paper. Because of computational difficulties implicated in the analysis of the above system, only its response to the zero mean ...
    • Limits of population coding 

      Johnson, Don (2003-07-20)
      To understand whether the population response expresses information better than the aggregate of the individual responses, the sum of the individual contributions is frequently used as a baseline against which to assess ...
    • Linear finite memory-length multiuser detectors 

      Juntti, Markku J.; Aazhang, Behnaam (1995-10-20)
      Decorrelating, LMMSE, and the noise-whitening multiuser detectors for code division multiple access (CDMA) are ideally infinite memory length (IIR) detectors. To obtain more practical and robust systems linear finite ...
    • LM-g SPLINES 

      de Figueiredo, Rui J.P. (1975-07-20)
      As an extension of the notion of an <em>L-g</em> spline, three mathematical structures called <em>LM-g</em> splines of types, I, II and II are introduced. (partial abstract)
    • Locating Available Bandwidth Bottlenecks 

      Ribeiro, Vinay Joseph; Riedi, Rudolf H.; Baraniuk, Richard G. (2004-09-01)
      The Spatio-temporal Available Bandwidth estimator (STAB), a new edge-based probing tool, locates thin links --- those links with less available bandwidth than all links preceeding them --- on end-to-end network paths. By ...
    • Long-Range Dependence: Now you see it now you don't! 

      Karagiannis , Thomas; Faloutsos , Michalis; Riedi, Rudolf H. (2002-11-20)
      Over the last few years, the network community has started to rely heavily on the use of novel concepts such as self-similarity and Long-Range Dependence (LRD). Despite their wide use, there is still much confusion regarding ...
    • A low complexity and low power SoC design architecture for adaptive MAI suppression in CDMA systems 

      Guo, Yuanbin; Cavallaro, Joseph R. (2005-05-01)
      In this paper, we propose a reduced complexity and power efficient System-on-Chip (SoC) architecture for adaptive interference suppression in CDMA systems. The adaptive Parallel-Residue-Compensation architecture leads to ...
    • Low Complexity Iterative Multiuser Detection and Decoding for Real-Time Applications 

      Das, Suman; Erkip, Elza; Cavallaro, Joseph R.; Aazhang, Behnaam (2005-07-01)
      This paper presents a low-complexity multiuser decoding technique that can be implemented in real time for a convolutionally coded direct sequence code division multiple access (DS-CDMA) system. The main contribution, ...
    • Low complexity MMSE based interference cancellation for LTE uplink MIMO receiver 

      Yin, Bei; Cavallaro, Joseph R. (2011-12-01)
      In this paper, we propose a novel low complexity minimum mean square error (MMSE) interference cancellation (IC) to minimize the residual inter-symbol and inter-antenna interference in LTE/LTE-Advanced uplink. In the ...
    • Low Complexity Opportunistic Decoder for Network Coding 

      Yin, Bei; Wu, Michael; Wang, Guohui; Cavallaro, Joseph R. (2012-12-01)
      In this paper, we propose a novel opportunistic decoding scheme for network coding decoder which significantly reduces the decoder complexity and increases the throughput. Network coding was proposed to improve the ...
    • Low complexity scalable MIMO sphere detection through antenna detection reordering 

      Wu, Michael; Dick, Chris; Sun, Yang; Cavallaro, Joseph R. (2012-07-01)
      This paper describes a novel low complexity scalable multiple-input multiple-output (MIMO) detector that does not require preprocessing and the optimal squared l2-norm computations to achieve good bit error (BER) performance. ...
    • Low Complexity System-On-Chip Architectures Of Optimal Parallel-Residue-Compensation In CDMA Systems 

      Guo, Yuanbin; McCain, Dennis; Cavallaro, Joseph R. (2004-05-01)
      In this paper, we propose a novel multi-stage Parallel-Residue-Compensation (PRC) receiver architecture for enhanced suppression of the MAI in CDMA systems. We extract the commonality to avoid the direct Interference ...
    • Low Power VLSI Architecture for Adaptive MAI Suppression in CDMA Using Multi-stage Convergence Masking Vector 

      Guo, Yuanbin; McCain, Dennis; Cavallaro, Joseph R. (2005-09-01)
      In this paper, we propose a novel low power and low complexity multi-stage Parallel-Residue-Compensation (PRC) architecture for enhanced MAI suppression in the CDMA systems. The accuracy of the interference cancellation ...
    • Low Rank Estimation of Higher Order Statistics 

      Nowak, Robert David; Van Veen, Barry D. (1995-12-01)
      Low rank estimators for higher order statistics are considered in this paper. Rank reduction methods offer a general principle for trading estimator bias for reduced estimator variance. The bias-variance tradeoff is analyzed ...
    • LOW-COMPLEXITY AND HIGH-PERFORMANCE SOFT MIMO DETECTION BASED ON DISTRIBUTED M-ALGORITHM THROUGH TRELLIS-DIAGRAM 

      Sun, Yang; Cavallaro, Joseph R. (2010-03-01)
      This paper presents a novel low-complexity multiple-input multipleoutput (MIMO) detection scheme using a distributed M-algorithm (DM) to achieve high performance soft MIMO detection. To reduce the searching complexity, ...
    • Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 μm Spectral Range 

      Patimisco, Pietro; Sampaolo, Angelo; Mihai, Laura; Giglio, Marilena; Kriesel, Jason; Sporea, Dan; Scamarcio, Gaetano; Tittel, Frank K.; Spagnolo, Vincenzo (2016)
      We demonstrated low-loss and single-mode laser beam delivery through hollow-core waveguides (HCWs) operating in the 3.7–7.6 μm spectral range. The employed HCWs have a circular cross section with a bore diameter of 200 μm ...