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Measurement method and device of power of microwave radiation source signal under interference of non-stable broadband

A technology of microwave radiation and power measurement, which is applied in the field of signal processing, can solve problems such as the inability to effectively measure useful signal power values, and achieve the effects of improving accuracy, robustness, and good adaptability

Active Publication Date: 2017-11-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, in a complex electromagnetic environment, due to factors such as non-stationary suppressed broadband interference and time-varying thermal noise of the power measurement equipment receiver, the received signal is a superposition of useful narrowband signals, time-varying broadband interference signals and thermal noise of the measurement equipment
At the same time, affected by the channel gain fluctuation of the measuring equipment, the power value of the useful signal cannot be effectively measured

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  • Measurement method and device of power of microwave radiation source signal under interference of non-stable broadband
  • Measurement method and device of power of microwave radiation source signal under interference of non-stable broadband
  • Measurement method and device of power of microwave radiation source signal under interference of non-stable broadband

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Embodiment Construction

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples of implementation. attached figure 1 and attached figure 2 The composition block diagram of the microwave radiation source signal power measurement device under the non-stationary broadband interference and the signal processing flow block diagram based on FPGA are described respectively. image 3 From the module point of view, it describes the composition of the device and the division of logic structure inside FPGA.

[0050] In this implementation example, it is assumed that the center frequency of the useful signal to be tested is 10.03GHz, and the bandwidth is 2MHz. The power range of the useful signal entering the receiving port of the power measurement device (receiving output of the receiving antenna) is -110dBm~-80dBm; the calibration signal ha...

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Abstract

The invention discloses a real-time measurement method and device of a power of a microwave radiation source signal under interference of a non-stable broadband that can effectively suppress the impact of the non-stable broadband interference on measurement of the power of a narrowband signal. According to the method, after a radiation signal of a target radiation source is received, a calibration signal generated locally is coupled to a received signal, and then analog down conversion and data sampling are performed; next, while a power of a sub-band in which to-be-tested useful signals are is calculated, a power of a signal in a cancellation sub-band is calculated; an average power measurement value of the cancellation sub-band is subtracted from an average power measurement value of the sub-band of the to-be-tested useful signals so as to obtain a power measurement value of useful signals containing no interference and noise; meanwhile, an average power measurement value of the calibration signal is calculated in real time; then the power measurement value of useful signals containing no interference and noise and the average power measurement value of the calibration signal are compared with a power nominal value Pc of the calibration signal, so as to obtain a power measurement value of a calibrated microwave radiation source signal.

Description

technical field [0001] The invention belongs to the field of signal processing, and relates to a measurement technology of microwave radiation source signal power, in particular to a real-time measurement method and a measurement device for microwave radiation source signal power under non-stationary broadband interference. Background technique [0002] Detecting and locating radio radiation sources is widely used in military and civilian fields such as law enforcement monitoring, disaster search and rescue, and electronic reconnaissance. There are two ways to locate radio radiation sources: active and passive. Among them, passive positioning is a relatively mature and effective positioning method at present by passively receiving electromagnetic signals and using one or more characteristics of the radiation source signal to realize radiation source positioning. The power of the microwave radiation source is a relatively basic and widely used characteristic quantity in the ...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04B17/318
CPCH04B1/109H04B17/318
Inventor 崔嵬沈清钱通侯建刚吴嗣亮
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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