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Differential Dual-Hop Relaying under User Mobility
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In this paper, differential m-PSK modulation and incoherent detection of double hop amplify and forward relay in time-varying Rayleigh fading channels are studied. The first-order time series model is used to characterize the time-varying characteristics of cascaded channels in the case of two symbol detection. Based on this model, the exact bit error rate (BER) expression is derived and verified by simulation results. The expression shows that BER is closely related to the autocorrelation characteristics of cascaded channels and bound error floors in the presence of high transmission power. In order to overcome the error level of fast fading, a near optimal & quot; multiple symbol & quot; differential sphere detection (msdsd) is also developed. The simulation results under different fading conditions show the error performance of msdsd.
anoop783457 1 0
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Detecting Cars Using Gaussian Mixture Models
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Detecting and counting cars can be used to analyze traffic patterns. Detection is also a first step prior to performing more sophisticated tasks such as tracking or categorization of vehicles by their type. This example shows how to use the foreground detector and blob analysis to detect and count cars in a video sequence. It assumes that the camera is stationary. The example focuses on detecting objects. To learn more about tracking objects, see the example titled Motion-Based Multiple Object Tracking.
anoop783457 0 0
1
Single-phase 9-level inverter
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This study proposes a single-phase, 9-level, cascade multilevel inverter topology. The multicarrier, phase disposition pulse width modulation scheme is employed to generate the gating signals for the power switches. Operational principles with switching functions are given. By controlling the modulation index, the desired number of levels: 3, 5, 7 and 9, of the inverter's output voltage can be achieved.
anoop783457 1 0
1
Cell Counting
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This example shows how to use a combination of basic morphological operators and blob analysis to extract information from a video stream. In this case, the example counts the number of E. Coli bacteria in each video frame. Note that the cells are of varying brightness, which makes the task of segmentation more challenging.
anoop783457 0 0
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