Signal sampling recovery method and device

Abstract

The invention discloses a signal sampling recovery method and device. The method comprises the steps that low speed sampling is performed on an original signal, and the sampling rate is 1 / M of the bitrate, wherein M>1; L times of up-sampling is performed on the signal obtained by low speed sampling, wherein L=M; and the signal obtained by up-sampling passes through a low-pass filter so as to recover the original signal. The original signal can be accurately recovered under the condition of low speed sampling so that the system hardware index requirement can be reduced, the feasibility of thescheme can be enhanced, and the problems that hardware implementation is quite difficult and the feasibility of the scheme is reduced because of the fact that the receiving end requires high samplingrate and processing speed to recover the original signal when the number K of overlapping of the systems like the OvTDM system is high can be solved.

Description

technical field [0001] The present application relates to the field of signal processing, and in particular to a signal sampling recovery method and device. Background technique [0002] In the OvTDM system, the receiver first samples the received analog signal to obtain a digital signal, and then performs subsequent processing on the digital signal, such as decoding. However, as the number of overlapping K increases, the bit rate becomes faster and faster, and OvTDM decoding requires high-speed sampling of the overlapping coded signal corresponding to each bit of the signal. From the A / D characteristics, the A / D sampling The rate is inversely proportional to the effective bit width, and the decoding of the OvTDM system signal has higher requirements on the bit width, so the sampling rate and the bit width form a pair of contradictions. However, it can be seen from the characteristics of OvTDM signals that the larger the K, the better the spectral efficiency, and the occupi...

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Problems solved by technology

However, as the number of overlaps K increases, the bit rate becomes faster and faster, and OvTDM decoding requires high-speed sampling of the overlapping coded signal corresponding to each bit of the signal. According to the A / D characteristics, the A / D sampling The rate is inversely proportional to the effective bit width, and the decoding of the OvTDM system signal requires a higher bit width, so the sampling rate and the bit width form a pair of contradictions

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