Vector signal analysis device and method

Abstract

The invention provides a vector signal analysis device. The vector signal analysis device is characterized in that an ADC (analog to digital converter) module performs A / D quantification on a received intermediate frequency signal, an I / Q (in-phase / quadrature) convertor performs I / Q conversion on a digital signal output by the ADC module so as to obtain base band I / Q data, an integer extraction module receives an I / Q signal output by the I / Q convertor, and extracts the I / Q signal after down conversion by integral multiples, a decimal fraction extraction module converts data velocity of I / Q data output by the integer extraction module into code element velocity which is an integral multiple of the data velocity, and further can perform decimal fraction multiple data velocity extraction conversion on an I / Q data file, and a vector demodulation analysis module performs subsequent vector demodulation analysis on I / Q data output by the decimal fraction extraction module. The vector signal analysis device can perform the flexible and complete vector demodulation analysis on digital modulation signals, uses the fixed velocity to perform A / D sampling, performs the I / Q conversion and integral multiple sampling rate conversion in a programmable device, and reduces design difficulty of A / D sampling of an existing vector signal analyzer and programmable hardware.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a vector signal analysis device, and also to a vector signal analysis method. Background technique [0002] Digitally modulated signals have the advantages of large information capacity, anti-interference and good confidentiality, and are widely used in communication systems such as satellite communication, radio and television, and communication countermeasures. Accurately measuring the symbol information and modulation quality of digitally modulated signals is an important prerequisite for the application of digital communication systems. The system provides testing guarantee. [0003] After completing the frequency conversion processing of the signal, the vector signal analyzer needs programmable hardware equipment and resident software to complete the vector demodulation analysis of various modulation formats and digital modulation signals with different symbol rates. Exist...

AI Technical Summary

Problems solved by technology

[0007] In the first implementation method above, the data obtained by the resident software of the vector signal analyzer is the result of vector demodulation, and the time-frequency domain information of the original sampling data is discarded, and the utilization rate of the data information is not high, resulting in an insufficient analysis angle. ; moreover, it is very difficult to implement with a variable high sampling rate A / D

[0008] In the second implementation method, the decimal multiple extraction process is performed in programmable devices, and the programming complexity is high; and the resident software lacks the decimal multiple sampling rate conversion function, and can only realize the demodulation of integer multiple sampling rate I / Q data Analysis, unable to play back and analyze the I / Q data of non-integer multiple symbol rates saved by other systems, poor software compatibility, and large use limitations

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