High-speed seamless capture pulse power statistics measuring method

A technology of statistical measurement and pulse power, applied in the field of measurement, can solve the problems of low data extraction rate, inability to achieve long-term data sampling and analysis without data loss, and limited data volume, and achieve the effect of fast sampling rate

Active Publication Date: 2014-03-19
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: due to the influence of memory capacity, the amount of data stored in this method is limited, and it cannot achieve long-term data sampling and analysis without data loss
Its disadvantages are: this method can realize long-term data sampling and analysis, but due to its low data extraction rate, only 1Ms / s, the time interval between two sampling data is 1us, and the pulse modulation width less than 1us Signals may be missed, no omission-free statistical measurements are guaranteed

Method used

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Embodiment 1

[0029] The circuit of the present invention mainly includes wave detection and front-end processing unit N1, A / D (analog / digital) converter N2, FPGA (programmable logic device) N3, DSP (digital signal processor) N4, CPU (central processing unit) N5 .

[0030] In the detection and front-end processing unit N1, the microwave signal is detected to obtain the envelope signal of the microwave signal. After the detected envelope signal is logarithmically amplified and linearly adjusted, the detection voltage is adjusted to meet the requirements of the A / D converter N2 input range. N2 is a 14-bit, 100Ms / s A / D converter, which converts the detection voltage into ADC data, and sends the ADC data to FPGA N3.

[0031] Due to the influence of DSP and CPU processing speed, statistical measurement without data loss cannot be completed at a rate of 100Ms / s, so the present invention performs slow-down processing on seamlessly captured statistical measurement. The speed reduction process is ...

Embodiment 2

[0047] On the basis of the foregoing embodiments, further, as Figure 1-Figure 2 As shown, a high-speed seamless capture pulse power statistical measurement method, which includes the following steps:

[0048] Step 1: In the detection and front-end processing unit, the microwave signal is detected to obtain the envelope signal of the microwave signal. After the envelope signal is logarithmically amplified and linearly adjusted, the detection voltage is adjusted to meet the requirements of the A / D converter. The input range, and then convert the detection voltage to ADC data, and send the ADC data to the FPGA;

[0049] Step 2: Perform speed reduction processing, which is completed by the 1:10 data extraction unit inside the FPGA. The extraction rate is 10Ms / s, and the ADC rate after extraction is 10Ms / s;

[0050] Step 3: The frequency response compensation of the power measurement is completed in the FPGA. The DSP first writes the frequency response data into the frequency res...

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Abstract

The invention provides a high-speed seamless capture pulse power statistics measuring method. The method comprises: in a demodulation and front-end processing unit N1, performing demodulation on microwave signals to obtain envelope signals of the microwave signals, after logarithmic amplification and linear conditioning are performed on the envelope signals after demodulation, adjusting demodulation voltages to the input scope of an A/D converter N2, the N2 being a 14-digit A/D converter with a rate of 100 Ms/s, converting the demodulation voltages into ADC data, and sending the ADC data into an FPGA N3. By using the scheme, the sampling rate can be as fast as 10 Ms/s so that modulation signals with pulse widths greater than 100 ns are not missed, and the statistics measuring demands of pulse power such as radar, guidance, wireless communication and the like can be basically satisfied.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a high-speed seamless capture pulse power statistical measurement method. Background technique [0002] In radar, guidance, and wireless communication, digital modulation methods integrate amplitude modulation and phase modulation into a multi-level organizational structure to represent bits of a data stream, such as CDMA (Code Division Multiple Access) and other communication methods. The peak-to-average power ratio of a pulse-modulated signal is a complex function of the transmitted data, not just the amplitude of the pulse-modulated signal. The previous method of determining the output power of a transmitter or amplifier based on pulse modulation depth and pulse modulation index is no longer applicable. The most accurate method for testing the output power of a transmitter or amplifier is to perform long-term statistical measurement of the output pulse power. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R21/133
Inventor 李金山徐达旺冷朋李强
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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