Timing recovery device and method

Abstract

The invention discloses a timing sequence recovery device which is used for compensation of sampling frequency offset of an input signal. The timing sequence recovery device comprises a timing sequence error corrector, a gain controller, a timing sequence error detector and a correction signal generator, wherein the timing sequence error corrector is used for generating an output signal according to a correction signal and the input signal, the gain controller is used for adjusting at least one of a signal edge low-frequency error component of the output signal and a signal edge high-frequency error component of the output signal and outputting a signal obtained after adjustment, the timing sequence error detector is used for generating an error signal according to the signal obtained after adjustment, and the correction signal generator is connected with the timing sequence error detector and the timing sequence error corrector in a coupling mode and used for generating the correction signal according to the error signal and outputting the correction signal to the timing sequence error corrector so that compensation of the sampling frequency offset of the input signal can be achieved.

Description

technical field [0001] The present invention relates to a timing recovery device and a timing recovery method, in particular to a timing recovery device and a timing recovery method for recovering timing through gain adjustment. Background technique [0002] In a communication system, when the sampling rates of the transmitting end and the receiving end do not match, a sampling frequency offset (SFO) will occur at the receiving end. If the sampling frequency offset is not compensated, it will cause an error in the sampling point, and the error will continue to accumulate over time, which will seriously affect the system performance. Therefore, the general communication system will be equipped with a timing recovery device to compensate The problem of sampling frequency offset. The design of the timing recovery device can be divided into data-aided (Data-aided) design and non-data-aided (Non-data-aided) design (or called blind (Blind) design). The data-assisted design uses ...

AI Technical Summary

Problems solved by technology

Due to the popularity of mobile devices, there is often relative motion between the transmitting end and the receiving end. This relative motion will cause changes in the transmission path and distance, causing the frequency of the signal received by the receiving end to drift. This phenomenon is called the Doppler effect. (DopplerEffect), and when the speed of the relative movement is faster, the Doppler effect will become more obvious. At this time, the known timing recovery technology cannot maintain a stable sampling point, which will cause bit error rate or packet loss in the communication system. error rate rises

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