Method for accurately measuring narrow pulse modulation parameter

Abstract

The invention relates to a method for accurately measuring a narrow pulse modulation parameter. According to the method, a narrow pulse modulation signal RF passes through a double-diode detector, a logarithmic amplifier and a channel operational amplifier unit in sequence and is divided into two paths of signals, one path of signal is fed into a high-speed analog-to-digital converter (ADC) module for analog-to-digital (A/D) conversion by a bandwidth control unit, the other path of signal is fed into a high-speed trigger circuit, the high-speed ADC module triggers A/D conversion according to a pulse signal generated by the high-speed trigger circuit, and effective ADC data is acquired, fed into a field programmable gate array (FPGA) and stored in the FPGA according to a trigger signal generated by the high-speed trigger circuit; and a digital signal processor (DSP) unit reads the effective ADC data from the FPGA, processes the data and stores an operation result in a high capacity random access memory (RAM). By the method for accurately measuring the narrow pulse modulation parameter, the narrow pulse modulation parameter with the minimal pulse width of 30ns and the dynamic range of -27 to +20dBm can be measured, and both the time parameter and the amplitude parameter of the narrow pulse modulation signal can be measured.

Description

technical field [0001] The invention relates to the measurement of narrow pulse modulation signals, in particular to a method for accurately measuring narrow pulse modulation parameters. Background technique [0002] Pulse modulation can be widely used in radar and communication fields. For the measurement of narrow pulse modulation signals, there are mainly the following two methods: [0003] 1. Spectrum analysis and measurement method: a broadband spectrum analyzer can be used to measure narrow pulse modulation signals. Through the frequency spectrum analysis of the pulse modulation signal, information such as the pulse width, pulse period and pulse amplitude of the pulse modulation signal can be obtained. [0004] Using the spectrum analysis measurement method has the advantage of a wide dynamic range, but the disadvantage is that it can only measure the pulse width, pulse period and pulse amplitude information of the narrow pulse modulation signal, but cannot measure th...

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Problems solved by technology

However, due to the limitation of the sensitivity of the oscilloscope, the measurement dynamic range is small and the sensitivity is poor; and because the pulse signal is measured by the oscilloscope after passing through the dete

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