框架去噪在A/D转换中的应用

Application in A/D Changes of Frame Gone Chirp

在信号传输的过程中 ,原始模拟信号首先要转换成数字信号 (A/ D) ,这就要对信号进行采样、量化。为了信号接受不失真 ,从硬件实现来看增加采样速率比增加量化精度更容易实现。在采样速率大于采样定理所要求的速率时 ,信号值之间的冗余度也增加了。从整体来看 ,对信号的量化误差接近于白噪声。而框架去噪就利用框架对过采样的信号进行变换重构 ,从而达到去噪的目的。

In the course of the transmission at the signal, originally imitates the signal firstly will change into the numeral signal(A/D), this will carry on sampling and quantification to the signal For the signal is accepted not lacking fidelity, from hardware realize to see that increasing sampling speed is realized more easily than increasing the quantification precision Superfluoussurplus degree has also increased between the signal value when sampling speed is more than the speed that the sampling theorem asked See that the quantification error to the signal is close to in the white noise from whole And that the chirp uses the signal of sampling of frame opposite to vary heavily constructing is gone that by the frame, thus achieves the purpose of chirp