SYSTEMS AND METHODS FOR DERIVATIVE LEVEL-CROSSING SAMPLING

摘要

Systems and methods for level-crossing sampling and reconstruction technique are disclosed. The derivative of the input signal is level-crossing-sampled, and the resulting samples are transmitted. At the receiver, these samples are fed to a zero-order hold followed by an integrator, which results in piecewise-linear reconstruction. The disclosed systems and methods are further refined to reduce the number of samples generated per unit of time, compared to methods based on zero-order-hold reconstruction, for a given signal-to-error ratio, without significant hardware overhead.

主权项

1. A system for reconstructing an input signal comprising:
a first differentiator configured to receive the input signal and generate a first signal representing the first derivative of the input signal; a second differentiator configured to receive the first signal and generate a second signal representing the second derivative of the input signal; a controller configured to receive the second signal and generate a quantization step; a level-crossing sampling block configured to receive the first signal and the quantization step and generate level-crossed samples of the first signal; a zero-order holding block configured to receive the level-crossed samples and the quantization step and generate a quantized signal; and an integrator configured to receive the quantized signal and the quantization step and generate a third signal representing a reconstructed signal of the input signal.