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Digital-predistortion-based sampled signal processing system

A sampling signal processing and digital predistortion technology, which is applied to digital variable/waveform display, parts of electrical measuring instruments, measuring devices, etc. Signal errors, compensation for performance degradation, effect of increasing input bandwidth

Inactive Publication Date: 2012-07-11
JIANGSU LVYANG ELECTRONICS INSTR GROUP
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Problems solved by technology

In order to minimize the inconsistency of the alternate sampling system, it is necessary to select an ADC (analog-to-digital converter) with good consistency and design a clock distributor so that it has as small a phase error and phase noise as possible. However, due to the large discreteness of the device, the effect of the above method is limited, so a new sampling signal processing system is needed to further reduce the performance degradation caused by inconsistency, and solve the problem of signal chain compensation technology in the prior art. The impact of real-time

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[0013] specific implementation plan

[0014] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.

[0015] All features disclosed in this specification, or steps in all disclosed methods or processes, except for mutually exclusive characteristics and / or steps, can be combined in any scheme, unless otherwise stated, can be used by other equivalent or similar Instead, each feature is intended to be replaced by alternative features, that is, each feature is only one embodiment of a series of equivalent or similar features unless stated otherwise.

[0016] Such as figure 1 As shown, a sampling signal processing system based on digital predistortion provided by the present invention includes a reference signal source, an analog front end, a digital-to-analog converter, a time domain equalizer, a filter and a signal chain compensation controller, and the reference signal The source, analog front end, di...

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Abstract

The invention discloses a digital-predistortion-based sampled signal processing system. The system comprises a reference signal source, an analog front end, digital-to-analog converters, time-domain equalizers, filters and a signal chain compensation controller which are connected through circuits to form a closed-loop circuit. A digital-predistortion-based signal chain compensation technology is applied to a digital signal processing system, so that the signal error can be remarkably reduced, the input bandwidth can be improved, and the problem about performance degradation caused by the inconsistency of circuits of a high-speed signal sampling system can be solved; and the problem that the signal chain compensation technology affects the real-time performance of an oscilloscope is solved due to the application of a high-speed signal processing technology.

Description

technical field [0001] The invention relates to a sampling signal processing system, in particular to a sampling signal processing system based on digital predistortion, and belongs to the technical field of signal testing and measurement. Background technique [0002] Signal chain compensation technology is a technical processing method in the field of electronic measuring instruments, but because of the real-time problems in the application of this technology in the field of oscilloscope high-frequency signals, it has not been used in domestic and foreign medium and high-end oscilloscope products. In order to minimize the inconsistency of the alternate sampling system, it is necessary to select an ADC (analog-to-digital converter) with good consistency and design a clock distributor so that it has as small a phase error and phase noise as possible. However, due to the large discreteness of the device, the effect of the above method is limited, so a new sampling signal proc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R13/00G01R1/30
Inventor 吕华平赵凯
Owner JIANGSU LVYANG ELECTRONICS INSTR GROUP
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