Broadband burst signal spectrum analyzer and wideband burst signal analysis method

Abstract

The invention discloses a broadband burst signal spectrum analyzer and a broadband burst signal analysis method, belonging to the technical field of electronic measurement. The execution bandwidth of the technical solution of the present invention is greater than the signal analysis capability of the acquisition and analysis bandwidth of the instrument; the measurement efficiency of the technical solution of the present invention is high, and the technical solution of the present invention is suitable for burst signals whose occurrence time, frequency and duration of the signal are unknown. The ability to detect and intercept signals is superior to traditional technical solutions; in the patented solution of the present invention, the tuned local oscillator can be tuned according to the changing characteristics of the input signal, and the frequency spectrum of the signal of interest can be quickly obtained.

Description

technical field [0001] The invention belongs to the technical field of electronic measurement, and in particular relates to a broadband burst signal spectrum analyzer and a broadband burst signal analysis method. Background technique [0002] With the development of digital technology, various broadband signals and burst signals emerge in an endless stream. Being able to quickly search or measure these burst signals in an ultra-wide frequency range is an important sign of the technical level of radio receiving equipment. Searching or measuring radio signals in a wide frequency range is one of the important contents of radio surveying or monitoring work. Superheterodyne tuning receiving and processing equipment can tune and receive in an extremely wide frequency range, and has the advantages of wide frequency coverage, large dynamic range, high sensitivity and high cost performance, and is widely used. In order to improve the ability of the superheterodyne tuning receiving ...

AI Technical Summary

Problems solved by technology

[0011] In the second technical solution, increasing the analysis bandwidth will inevitably lead to an increase in the acquisition speed of the intermediate frequency. Due to the constraints of the current ADC device, the higher the ADC acquisition speed, the fewer the number of acquisition bits, and the lower the signal-to-noise ratio and dynamic range. Signaling interception capability; IF bandwidth B IF Increase, in order to achieve the required frequency resolution, it will inevitably lead to an increase in the number of acquisition points and the number of FFT points, the number of FFT points will increase by N times, and the amount of FFT calculation will increase by Nlog 2 N times, so processing speed will also be affected, possibly causing T P The increase of time, in addition, the number of FFT points is also limited by the maximum number of points

At the same time, in the second technical solution, the frequency switching time T is reduced F or T C The technical means used usually lead to a substantial increase in the difficulty of hardware design, increase in cost, or reduce the performance of the receiver such as phase noise

In addition, under the current technical conditions, Tf time often accounts for a large proportion, and the impact on speed cannot be ignored.

Therefore, when measuring broadband burst signals in a frequency span larger than the analysis bandwidth, the analysis ability of the second technical solution will be greatly reduced

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