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The fitting of an ellipse to the iris contour is usually performed using five unknown parameters. In this study, we divide the continuous gaze estimation of a head-mounted eye camera into two phases. One phase, known as the calibration phase, is used to estimate the eyeball center position in relation to the coordinate system of the head-mounted eye camera. The other phase is used to fit the iris...
Combining precoding and orthogonal space-time block codes (OSTBCs) can obtain full-diversity order and provide additional array gain. This paper proposes optimal linear precoding and quantization for OSTBCs with erroneous feedback. Lloyd algorithm is used for designing codebooks with noisy quantized feedback in general case. In two extreme cases, the transmitter can obtain perfect CSI and no CSI available,...
In this paper, a novel sequence detection method based on codebook with channel correlation information (CCI) for the reliable feedback of CQI (channel quality information) in the uplink fast feedback channel is proposed, which utilizes the codebook based maximum likelihood detection method. Using the relatively less training frames, we can get an accurate approximation of the statistical CCI for...
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