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Information Sciences and Systems, 2008. CISS 2008. 42nd Annual Conference on

Date 19-21 March 2008

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Displaying Results 1 - 25 of 240
  • CISS 2008

    Publication Year: 2008, Page(s):i - ii
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  • [Copyright notice]

    Publication Year: 2008, Page(s): iii
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  • Compressive sensing

    Publication Year: 2008, Page(s):iv - v
    Cited by:  Papers (13)
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  • Economics and technology in the evolution of networks

    Publication Year: 2008, Page(s): vi
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  • Information theory of wireless networks

    Publication Year: 2008, Page(s): vii
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  • Author index

    Publication Year: 2008, Page(s):viii - xlvii
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  • Session index

    Publication Year: 2008, Page(s):xlviii - lxxii
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  • Noisy compressive sampling limits in linear and sublinear regimes

    Publication Year: 2008, Page(s):1 - 4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    The authors have recently established a set of results that characterize the number of measurements required to recover a sparse signal in CM with L non-zero coefficients from compressed samples in the presence of noise. These results indicate that for a number of different recovery criteria, O (L) (an asymptotically linear multiple of L) measurements are necessary and sufficient for si... View full abstract»

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  • Compressed channel sensing

    Publication Year: 2008, Page(s):5 - 10
    Cited by:  Papers (87)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB) | HTML iconHTML

    Reliable wireless communications often requires accurate knowledge of the underlying multipath channel. This typically involves probing of the channel with a known training waveform and linear processing of the input probe and channel output to estimate the impulse response. Many real-world channels of practical interest tend to exhibit impulse responses characterized by a relatively small number ... View full abstract»

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  • A fast reconstruction algorithm for deterministic compressive sensing using second order reed-muller codes

    Publication Year: 2008, Page(s):11 - 15
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (417 KB) | HTML iconHTML

    This paper proposes a deterministic compressed sensing matrix that comes by design with a very fast reconstruction algorithm, in the sense that its complexity depends only on the number of measurements n and not on the signal dimension N. The matrix construction is based on the second order Reed- Muller codes and associated functions. This matrix does not have RIP uniformly with respect to all k-s... View full abstract»

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  • 1-Bit compressive sensing

    Publication Year: 2008, Page(s):16 - 21
    Cited by:  Papers (100)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB) | HTML iconHTML

    Compressive sensing is a new signal acquisition technology with the potential to reduce the number of measurements required to acquire signals that are sparse or compressible in some basis. Rather than uniformly sampling the signal, compressive sensing computes inner products with a randomized dictionary of test functions. The signal is then recovered by a convex optimization that ensures the reco... View full abstract»

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  • The Dantzig selector and generalized thresholding

    Publication Year: 2008, Page(s):22 - 25
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB) | HTML iconHTML

    The Dantzig selector is a recently introduced technique for near-optimal estimation of sparse signals from a limited set of measurements. This paper offers an interpretation of the Dantzig selector as a generalized thresholding operator. This interpretation ties together two seemingly disparate phenomena: the fact that we can estimate sparse signal accurately, and the fact that we can compute this... View full abstract»

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  • Iteratively Re-weighted Least Squares minimization: Proof of faster than linear rate for sparse recovery

    Publication Year: 2008, Page(s):26 - 29
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (375 KB) | HTML iconHTML

    Given an mtimesN matrix Phi, with m<N, the system of equations Phix=y is typically underdetermined and has infinitely many solutions. Various forms of optimization can extract a "best" solution. One of the oldest is to select the one with minimal lscr2 norm. It has been shown that in many applications a better choice is the minimal lscr1 norm solution. This is the case in ... View full abstract»

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  • On wireless network scheduling with intersession network coding

    Publication Year: 2008, Page(s):30 - 35
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB) | HTML iconHTML

    Cross-layer optimization including congestion control, routing, and scheduling has shown dramatic throughput improvement over layered designs for wireless networks. In parallel, the paradigm-shifting network coding has empirically demonstrated substantial throughput improvement when coding operations are permitted at intermediate nodes and packets from different sessions are mixed. Designing netwo... View full abstract»

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  • Bandwidth-sharing in overloaded networks

    Publication Year: 2008, Page(s):36 - 41
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (369 KB) | HTML iconHTML

    Bandwidth-sharing networks as considered by Massoulie & Roberts provide a natural modeling framework for describing the dynamic flow-level interaction among elastic data transfers. Under mild assumptions, it has been established that a wide family of so-called alpha-fair bandwidth-sharing strategies achieve stability in such networks provided that no individual link is overloaded. In the prese... View full abstract»

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  • Modelling multi-path problems

    Publication Year: 2008, Page(s):42 - 45
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB) | HTML iconHTML

    In this paper we consider the behaviour of both primal and dual multi-path algorithms for a simple network of three resources. We examine the equilibrium behaviour of our models as well as their transient response to the effect of a resource failing. The timescales over which the multi-path algorithms respond to changes in the network conditions are seen to be closely related to the round trip tim... View full abstract»

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  • Optimal traffic engineering via Newton's method

    Publication Year: 2008, Page(s):46 - 51
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (274 KB) | HTML iconHTML

    Recently, it has been proven that the minimum-cost multicommodity flow can be realized by a link-state routing protocol, PEFT, using uneven traffic splitting (D. Xu et al., 2008). The achievement is due to solving a new convex optimization problem, network entropy maximization (NEM), by a gradient descent algorithm. However, gradient descent algorithms are notorious for slow convergence to optimal... View full abstract»

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  • Game theory for heterogeneous flow control

    Publication Year: 2008, Page(s):52 - 56
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (275 KB) | HTML iconHTML

    A general framework is developed for networks with flows that use all available congestion signals to regulate their rates. It is conceptually a generalization of the existing network utility maximization (NUM) theory for homogeneous congestion control. Instead of a convex optimization characterization in NUM, a game with multiple convex optimizations is formulated to characterize equilibria in su... View full abstract»

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  • A simulation study of antenna selection for compact MIMO arrays

    Publication Year: 2008, Page(s):57 - 61
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (327 KB) | HTML iconHTML

    We consider a compact multiple-input multiple-output (MIMO) system where antenna elements are placed linearly and side by side in a limited size array. Inevitably, both mutual coupling and spatial correlation effects have a strong presence in such system. We then investigate the performance of both hard and soft antenna selection in such conditions using Monte Carlo simulations. Our results indica... View full abstract»

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  • On the degrees-of-freedom of the MIMO interference channel

    Publication Year: 2008, Page(s):62 - 67
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (238 KB) | HTML iconHTML

    The high signal-to-noise ratio capacity of the symmetric MIMO interference channel is characterized as a function of the interference-to-noise ratio. This work is a multiple antenna extension of the degrees of freedom expressions derived by Etkin et al. for the single antenna case. This characterization considers the case where the number of receive antennas is greater than or equal to the number ... View full abstract»

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  • Energy-efficient adaptive MIMO systems leveraging dynamic spare capacity

    Publication Year: 2008, Page(s):68 - 73
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    In this paper, we propose an adaptive technique exploiting transmission mode switching between multiple input multiple output (MIMO) and single input multiple output (SIMO) with antenna selection to conserve mobile terminals' energy. We focus on saving uplink RF transmission energy in cellular systems supporting dynamic best effort (file transfer) traffic loads. The key idea is to judiciously slow... View full abstract»

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  • Optimizing the rate of a correlated MIMO link jointly over channel estimation and data transmission parameters

    Publication Year: 2008, Page(s):74 - 79
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (538 KB) | HTML iconHTML

    We consider a single-user correlated MIMO channel with block fading, where each block is divided into training and data transmission phases. The receiver has a noisy CSI that it obtains through a channel estimation process, while the transmitter has partial CSI in the form of covariance feedback. We optimize the achievable rate jointly over the parameters of the training and data transmission phas... View full abstract»

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  • Low complexity multiuser MIMO scheduling with chordal distance

    Publication Year: 2008, Page(s):80 - 84
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1127 KB) | HTML iconHTML

    In multiuser MIMO systems, block diagonalization (BD) eliminates inter-user interference with perfect CSI since the transmitter decomposes a multiuser MIMO channel into multiple parallel independent single-user MIMO channels. For a large number of users, the transmitter selects a subset of users who have good channels to maximize the system throughput. In this paper, a new low complexity schedulin... View full abstract»

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  • Distributed antenna system: Performance analysis in multi-user scenario

    Publication Year: 2008, Page(s):85 - 89
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1319 KB) | HTML iconHTML

    This paper provides a comparative study of the distributed antenna system (DAS) and the conventional co-located antenna system (CAS) in the multi-user scenario. It is demonstrated that thanks to the decrease of the maximum minimum access distance, a tremendous transmission power gain can be achieved by DASs. Besides, the DAS has great potentials to outperform the CAS in terms of multi-user capacit... View full abstract»

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  • Optimum channel estimation pilot design for CDD-OFDM with application to DVB

    Publication Year: 2008, Page(s):90 - 94
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (499 KB) | HTML iconHTML

    Cyclic delay diversity (CDD) is a low-complexity standard-conformable transmit diversity technique for coded orthogonal frequency division multiplexing (OFDM) systems. However, it makes channel estimation more challenging due to the increased frequency-selectivity of the channel. In this paper, we propose a novel pilot-aided channel estimation scheme for CDD-OFDM. By alternating and optimizing the... View full abstract»

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