An Arbitrary Waveform Generating System and Method

Abstract

The invention discloses an arbitrary waveform generation system and method for variable-speed waveform data playback based on complex combined triggering. The system comprises a waveform data storage unit and a trigger mode based waveform editing and trigger playback unit; the trigger mode based waveform editing and trigger playback unit comprises a waveform reading address generation subunit and a complex wave synthesis subunit; the waveform reading address generation subunit comprises a pulse gating module, a trigger module, a trigger reset module, a waveform trigger module, a waveform trigger reset module, a waveform trigger buffer module, a sequence trigger module, a sequence trigger repeating module and a sequence trigger setting module. On the basis of real-time digital signal processing, complex combined trigger and variable-speed waveform data playback technologies, the system and method gives full play to the characteristics of all-digital waveform synthesis, high resolution, good signal stability, many signal styles, various modulation and the like, and has the advantages of quick switching, capability of changing length of signal cycles and the like.

Description

technical field [0001] The invention belongs to the field of arbitrary waveform generation, and in particular relates to an arbitrary waveform generation system for variable-rate playback of waveform data triggered by complex combinations, and an arbitrary waveform generation method for variable-rate playback of waveform data triggered by complex combinations. Background technique [0002] Arbitrary waveform generator is a multi-purpose signal excitation source, including FSK, MSK, QAM, PSK and other digital modulation functions, which can generate complex time-varying multi-channel signals and complex modulation signals. With the development of electronic technology, digital baseband modulation signal generation technology has been widely used in various fields such as communication, control, and measurement. Its role in the military is manifested in multiple levels of land, sea, air, and space, high deployment density, multiple spectrum, large time width, large bandwidth, ...

AI Technical Summary

Problems solved by technology

These two methods have their own advantages and disadvantages. Compared with the waveform playback method, the bandwidth realized by the real-time method is smaller, but the signal style can be changed in various ways; the waveform playback method can only generate the waveform existing in the memory. The local bus calls the hard disk data or calls the data of the external counting machine through the external interface, so the waveform download speed and the speed of the external interface are affected by the bandwidth and rate of the instrument's local bus

[0004] In existing instruments and equipment, such as Agilent's 33250, which uses single trigger and cyclic trigger, sequence trigger and combination trigger are not used, and it cannot output phase continuous multi-segment waveforms; R&S's AFQ100A / B only uses single trigger, cyclic trigger Trigger and combined trigger functions, the output signal styles are not diverse enough; Tek’s AWG7122C uses single trigger, cycle trigger, and burst trigger, but does not use sequence trigger, combined trigger, etc., and cannot output multi-segment waveforms with different time gaps

[0005] There are not many signal styles in the existing function generators and arbitrary waveform generators, such as half-cycle, full-cycle, quarter-cycle signals, arbitrary one-cycle signals, etc., there are few types of triggers, and in certain The sampling rate is not variable in triggering, etc.

Images