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Modulating domain analyzing module based on A/D conversion

An analysis module and analog-to-digital conversion technology, which is applied in the field of communication measurement, can solve the problems of interpolation counting pulse system error, low test accuracy of slope interpolation method, and high precision requirements of analog circuits, etc., to achieve elimination of system error and simple and easy control line, the effect of frequency range extension

Inactive Publication Date: 2010-01-06
NO 50 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

The accuracy of this method is determined by the charge-discharge current ratio, which requires high accuracy of the analog circuit. Due to the influence of device leakage current and capacitance accuracy, especially the non-linearity of small current discharge, the test accuracy of the ramp interpolation method is relatively low.
[0006] Both the vernier interpolation method and the slope interpolation method have a systematic error of ±1 generated by the interpolation count pulse

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  • Modulating domain analyzing module based on A/D conversion
  • Modulating domain analyzing module based on A/D conversion
  • Modulating domain analyzing module based on A/D conversion

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Embodiment Construction

[0028] The modulation domain analysis module based on analog-to-digital conversion of the present invention can be combined with figure 2 , image 3 The description is as follows, where, figure 2 It is a functional block diagram of the modulation domain analysis module based on analog-to-digital conversion in the present invention; image 3 It is a signal processing flowchart of the module of the present invention.

[0029] After signal preprocessing, the measured signal FX is sent to the event counter in two zero waiting time (ZDT) counters for counting, and the other is sent to the time gate logic control unit; the time base signal CLK is sent to two zero waiting time (ZDT) counters all the way. The time base counter in the time (ZDT) counter counts, and the other way is sent to the time gate logic control unit. The time base signal CLK generates a gate signal through a frequency divider in the time gate logic control unit, which is called the original gate signal G. Af...

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Abstract

The invention discloses a analysis module in demodulation domain based on A / D conversion, which comprises: two timers for waiting time to continual count and generate counting value, a time gate logic control unit, an error impulse charge / discharge circuit to generate error impulse signal, a A / D converter to convert the impulse signal into digital value, and a high-speed buffer MDP unit to treat digital value and calculate instantaneous frequency or phase or impulse interval. This invention simplifies circuit, improves testing accuracy, and has wide application.

Description

technical field [0001] The invention relates to a communication measurement technology, in particular to a modulation domain analysis module based on analog-to-digital conversion. Background technique [0002] The modulation domain is a plane domain composed of signal frequency and time, which directly reflects the change of signal frequency or phase with time, can directly measure the modulation characteristics of complex signals, and can also be used to measure the pulse interval of signals. The block diagram of the modulation domain analysis principle in the prior art is as follows: figure 1 As shown, it includes two zero-latency (ZDT) counters, a time gate control unit, an error pulse measurement circuit—that is, an interpolation module (interpolator shown in the figure), and a cache memory and data processing unit. The performance of the modulation domain analysis mainly depends on the performance of the interpolation block that makes the measurement of the error pulse...

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Application Information

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IPC IPC(8): H04L29/14H04L69/40
Inventor 杨成李玉涛杨文举向浩
Owner NO 50 RES INST OF CHINA ELECTRONICS TECH GRP
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