Arbitrary waveform synthesis method based on sampling rate conversion technology

Abstract

The invention discloses an arbitrary waveform synthesis method based on a sampling rate conversion technology, which comprises the following steps of: calculating waveform data at a variable sampling rate, storing the waveform data into a memory, and in the storage process, when a memory read-write control module receives a control command, executing write operation and then executing read operation; and then dividing the read data into multiple parallel paths, wherein each path of data is independently subjected to sampling rate conversion, the validity of each path of data and the arrangement relation of each path of data are controlled through a parameter of sampling rate conversion multiple, and the valid data are re-spliced to obtain output data under a fixed sampling rate. The mode facilitates effective filtering of output signal mirror image frequency components, stray is reduced, and meanwhile the sampling rate index of the arbitrary waveform generator is improved.

Description

technical field [0001] The invention belongs to the technical field of waveform generators, and more specifically relates to an arbitrary waveform synthesis method based on sampling rate conversion technology. Background technique [0002] Arbitrary waveform generator is a signal source widely used in electronic equipment, equipment development, production and maintenance guarantee, which can solve the problems that the real signal scene is difficult to reproduce or the risk is extremely high. For example, the whole machine debugging and performance appraisal of the radar use real targets (such as aircraft) to provide test signals to the radar, which not only consumes a lot of manpower and material resources, but also affects the development progress, and even cannot be realized in some cases (such as bad weather). A high-speed low-spur arbitrary waveform generator is an ideal tool to solve this problem. With the rapid development of modern communications, aerospace detecti...

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of the highest sampling rate of the system, the design of the anti-aliasing analog filter at the back end of DDWS technology is complicated, which may easily cause incomplete filtering and lead to large output spurs

To sum up, both DDWS technology and DDFS technology cannot meet the requirements of high sampling rate, high bandwidth and low spurious arbitrary waveform synthesis due to the defects of their respective structures.

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