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This paper presents a solution to the coherent change detection (CCD) problem using multi-polarization synthetic aperture radar (SAR) imagery. The multi-polarization SAR imagery (i.e., the day-1 reference and day-2 test images) are modeled as jointly correlated complex Gaussian vectors with unknown correlation, rho = gammaejPhi . Maximum likelihood estimates of the unknown phase and coherence parameters...
For a set of T independent N-variate Gaussian training samples (T < N), we derive maximum the likelihood (ML) estimate of its time-varying autoregressive model of order m, TVAR(m), and method to estimate the order of an autoregressive (AR) model, regardless of its stationary or time-varying nature. For the estimated order m, we then use the TVAR(m) model parameters to calculate the ML time-frequency...
A hybrid model integrates a family of local representations to create a global description of a system operating in a heterogeneous environment. The common hybrid models have been developed for aerial applications and are not well suited for ground motions restricted to a road grid. This paper extends the work presented at last year's conference and presents a provisional version of the Gaussian wavelet...
In this paper, we derive the probability density function of the mutual information between transmitted and received complex signals of spatially correlated multiple-input multiple-output (MIMO) communication systems. Using this density we study the most important information-theoretic measures, the so-called delay-limited capacity, outage capacity, ergodic capacity and capacity variance of spatially...
We consider transmission of a continuous amplitude source over a quasi-static Rayleigh fading channel. We analyze three different source and channel coding strategies in terms of overall expected distortion (ED). Our goal is to maximize the distortion exponent (Delta), which is the exponential decay rate of ED with increasing SNR. In each case, by adjusting the system parameters we find the best Delta...
We study the vector version of the Gaussian CEO problem. We present a lower bound on the sum-rate of any class of distributed quantizers that meet the quadratic distortion constraint, and show that it is tight in various situations including the symmetric one
In the paper we consider the case of covariance feedback in MIMO communications, where the channel matrix is modelled as a Gaussian random matrix with zero mean and a non-white covariance matrix available at the transmitter through receiver feedback. Although the structure of the optimal input covariance matrix that achieves the ergodic capacity is known, a closed form expression for its eigenvalues...
Visual information from lip contour has been successfully shown to improve the robustness of automatic speech recognition especially in noisy environments. In this paper, a novel method for lip reading is presented. In the method, hue information of input images is used for lip area detection. Then, a set of morphological operations is applied to detect lip contour. Polynomial fitting is designed...
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