A receiving data alignment method and system based on multi-channel acquisition

Abstract

The invention discloses a method and system for aligning received data based on multi-channel acquisition, which belongs to the field of signal processing. The method includes: receiving test data and an associated clock sent by a multi-channel ADC in a test mode, and sequentially performing serial-to-parallel conversion and recombination, Obtain the corresponding reorganized data; shift the data bits inconsistent with the corresponding test data in each reorganized data to make the two consistent, record the first shift value and shift data bit corresponding to each channel; The associated clock is delayed or advanced, so that the associated clock of each channel has the same frequency and phase, and the reorganized data after each shift is reorganized; the data after the reorganization is inconsistent with the multi-channel test data The data points are shifted so that the data after the secondary recombination is consistent with the multi-channel test data, and the channel and the second shift value of the inconsistent data points are recorded. The alignment and correct reorganization of multi-channel sampling data can be realized.

Description

technical field [0001] The invention belongs to the field of signal processing, and more specifically relates to a method and system for aligning received data based on multi-channel acquisition. Background technique [0002] With the increasing application of high-speed signal interconnection and broadband channel, in the process of data transmission, the amount of data is getting larger and the rate is getting higher and higher. Low-Voltage Differential Signaling (LVDS) technology has become the The preferred interface standard for acquisition systems. Limited by the sampling rate of a single analog-to-digital converter (Analog-to-Digital Converter, ADC), usually multiple ADCs are used to increase the sampling rate of the acquisition system in a time-interleaved sampling manner, so multiple LVDS channels are required to convert from analog to digital The sampling data at the end is transmitted to the data receiving end, such as a Field Programmable Gate Array (Field Progr...

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Problems solved by technology

In addition, when the values ​​of adjacent sampling points are close, the same value may be obtained due to insufficient ADC resolution and sampling rate. If this situation is not handled, misjudgment may occur during data reception, or the sampling time point may be delayed. Inaccurate, when processing data at the data receiving end, the delay of the receiving pin is too large or too small, which will also lead to misjudgment when receiving data

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