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We study the optimization of analog joint source-channel coding schemes based on non-linear mappings for the transmission of independent Gaussian messages over the two user Gaussian Broadcast Channel (GBC). We focus on a low complexity, low delay, analog joint source channel coding communication system based on extensions of existing Nested Quantization techniques. A procedure to optimize the decoding...
This paper describes a robust and effective calibration algorithm for pipelined analog-to-digital converters, which compensates for large gain errors, without the requirement for a long startup time as required by the other dither-based algorithms presented in literature. The proposed technique, time-spreading self-calibration, operates the front-end sample-and-hold stage in half rate at startup and...
In this paper, an improved neural network is applied to CCD noise removal in digital image. According to the characteristics of the nonlinear response function in the CCD camera, the denoising scheme is based on the adaptive window sizes and parameter of the filter. The improved NN both approaches to CCD PTC (photon transfer curve) and classifies it in nonlinearity and assigns the optimum coefficient...
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