CN204559545U - A kind of automatic correction system of wideband vector signal - Google Patents
A kind of automatic correction system of wideband vector signal Download PDFInfo
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- CN204559545U CN204559545U CN201520236535.9U CN201520236535U CN204559545U CN 204559545 U CN204559545 U CN 204559545U CN 201520236535 U CN201520236535 U CN 201520236535U CN 204559545 U CN204559545 U CN 204559545U
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Abstract
The utility model relates to signal processing technology field, a kind of automatic correction system of wideband vector signal is disclosed, comprise wideband vector signal maker, high-Speed Data-Acquisition Module, signal-corecting module, described wideband vector signal maker is connected and composed by baseband signal generator and vector signal modulator by controlling host computer, the output of vector signal modulator is connected with high-Speed Data-Acquisition Module by cable, the output of high-Speed Data-Acquisition Module is connected with signal-corecting module by PCI-Ex8 data-interface, the output of signal-corecting module passes through RS-232 interface, USB interface or LAN are connected with the control host computer of wideband vector signal generator.The utility model can complete test and the correction signal generation of wideband vector signal generator automatically.More traditional corrective system is simple and clear, can save a large amount of time and manpower, reduce human error, improves and corrects efficiency and correction accuracy.
Description
Technical field
The utility model relates to signal processing technology field, particularly relates to a kind of automatic correction system of wideband vector signal.
Background technology
Wideband vector signal generator can generate the vector modulation signal of high stable, broadband, rapid jumping and random waveform, has been widely used in the fields such as radar, communication, electronic measurements.Relative to the proprietary hardware development signal generator of traditional employing, build based on general test instrument that the mode configuration of signal generator is simple, reliable and stable, the R&D cycle is short, highly versatile, one of main implementation becoming contemporary broadband vector signal generator gradually.Its general principle is exactly, the instruments such as Matlab are utilized to generate digital signal waveform data, then Wave data is downloaded in the internal memory of baseband signal generator, baseband signal generator is utilized to generate I/Q two-way base-band analog signal, and by vector signal generator, quadrature carrier modulation is carried out to I/Q two paths of signals, realize radiofrequency signal and export.Wherein, realize the orthogonal phase shift of the critical component I/Q modulator of vector modulation signal, quality that mixing performance directly determines vector modulation signal.Because the mixting circuit of I/Q modulator can not reach desirable poised state, also can there is phase deviation in orthogonal movement on different frequencies, and especially when bandwidth is very large, error can be larger.Therefore, in order to ensure that the quality outputed signal meets application demand, must correct in advance wideband vector signal generator.Fig. 1 is the schematic diagram of existing wideband vector signal bearing calibration.First, the error model of wideband vector signal is derived based on the modulation principle of wideband vector signal; Then, under different input signal conditions, utilize frequency spectrograph to carry out power measurement to the output signal of wideband vector signal generator, solve except the parameters in error model, thus set up the predistortion correction compensating network of I/Q input; Finally, generate digital signal waveform according to error model, and download in baseband signal generator, to realize the error correction of wideband vector signal.
But the weak point of this method is, need the artificial measuring instruments such as frequency spectrograph that use to measure, automaticity is not high, and easily introduces manual operation error; Meanwhile, error model generally all more complicated, solves difficulty comparatively large, easily introduces the error of calculation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of automatic correction system of wideband vector signal, can improve automaticity and the precision of wideband vector signal correction.
For achieving the above object, the utility model adopts following technical scheme:
A kind of automatic correction system of wideband vector signal, comprise wideband vector signal maker, high-Speed Data-Acquisition Module, signal-corecting module, described wideband vector signal maker is connected and composed by baseband signal generator and vector signal modulator by controlling host computer, the output of vector signal modulator is connected with high-Speed Data-Acquisition Module by cable, the output of high-Speed Data-Acquisition Module is connected with signal-corecting module by PCI-Ex8 data-interface, the output of signal-corecting module passes through RS-232 interface, USB interface or LAN are connected with the control host computer of wideband vector signal generator.
A kind of automatic correction system of wideband vector signal, described high-Speed Data-Acquisition Module is the synchronous PCIe data collecting card of binary channels, there is the PCI-Ex8 high-speed interface supporting 1GBytes/S high speed bandwidth, and carry out with data collecting card holding wire the interface adaptation board that mates; Resolution is 14, and sample rate is 2GS/S.
An automatic correction system for wideband vector signal, described signal-corecting module is microprocessor.
An automatic correction system for wideband vector signal, the output of described high-Speed Data-Acquisition Module or replace with RS-232 interface, USB interface or local network LAN.
Owing to adopting technical scheme as above, superiority of the present utility model is:
The utility model can complete the parameter testing of wideband vector signal generator automatically, correction parameter calculates and correction signal generates.More traditional corrective system automaticity is high, can save a large amount of time and manpower, greatly improves and corrects efficiency, meet the direction of future development; Decrease the manual operation in conventional correction, also reduce human error, improve correction accuracy; Trimming process is simple and clear, is easy to realize.
Accompanying drawing explanation
Fig. 1 is existing wideband vector signal corrective system schematic diagram;
Fig. 2 is wideband vector signal corrective system theory diagram of the present utility model.
Embodiment
Below embodiment of the present utility model is described, so that those skilled in the art understands the present invention better.Requiring particular attention is that, in the following description, when perhaps the detailed description of known function and design can desalinate the utility model content, these are described in and will be left in the basket here.
As shown in Figure 2, a kind of automatic correction system of wideband vector signal, comprise wideband vector signal maker, high-Speed Data-Acquisition Module, signal-corecting module, described wideband vector signal maker is connected and composed by baseband signal generator and vector signal modulator by controlling host computer, the output of vector signal modulator is connected with high-Speed Data-Acquisition Module by cable, the output of high-Speed Data-Acquisition Module is connected with signal-corecting module by PCI-Ex8 data-interface, the output of signal-corecting module passes through RS-232 interface, USB interface or LAN are connected with the control host computer of wideband vector signal generator.
Described high-Speed Data-Acquisition Module is the synchronous PCIe data collecting card of binary channels, resolution is 14, sample rate is 2GS/S, there is the PCI-Ex8 high-speed interface supporting 1GBytes/S high speed bandwidth, and carry out with data collecting card holding wire the interface adaptation board that mates, for providing signal measurement interface for wideband vector signal maker.
Described high-Speed Data-Acquisition Module is used for intermediate frequency/radiofrequency signal that Real-time Collection wideband vector signal maker exports.
Described signal-corecting module is microprocessor, for the wideband vector signal that Real-time Obtaining is gathered by high-Speed Data-Acquisition Module, for amplitude-frequency characteristic and the calculating signal correction parameter of measuring-signal.And by signal correction parameter transmission to the control host computer of wideband vector signal generator, control host computer according to the signal model after correction, namely can generate the signal waveform after correction, complete the automatic calibration of wideband vector signal.
Although be described the illustrative embodiment of the utility model above; so that those skilled in the art understand the utility model; but should be clear; the utility model is not limited to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present utility model determined in appended claim; these changes are apparent, and all innovation and creation utilizing the utility model to conceive are all at the row of protection.
Claims (4)
1. the automatic correction system of a wideband vector signal, it is characterized in that: comprise wideband vector signal maker, high-Speed Data-Acquisition Module, signal-corecting module, described wideband vector signal maker is connected and composed by baseband signal generator and vector signal modulator by controlling host computer, the output of vector signal modulator is connected with high-Speed Data-Acquisition Module by cable, the output of high-Speed Data-Acquisition Module is connected with signal-corecting module by PCI-Ex8 data-interface, the output of signal-corecting module passes through RS-232 interface, USB interface or LAN are connected with the control host computer of wideband vector signal generator.
2. the automatic correction system of a kind of wideband vector signal as claimed in claim 1, it is characterized in that: described high-Speed Data-Acquisition Module is the synchronous PCIe data collecting card of binary channels, there is the PCI-Ex8 high-speed interface supporting 1GBytes/S high speed bandwidth, and carry out with data collecting card holding wire the interface adaptation board that mates; Resolution is 14, and sample rate is 2GS/S.
3. the automatic correction system of a kind of wideband vector signal as claimed in claim 1, is characterized in that: described signal-corecting module is microprocessor.
4. the automatic correction system of a kind of wideband vector signal as claimed in claim 1, is characterized in that: the output of described high-Speed Data-Acquisition Module or replace with RS-232 interface, USB interface or local network LAN.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520236535.9U CN204559545U (en) | 2015-04-20 | 2015-04-20 | A kind of automatic correction system of wideband vector signal |
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| CN201520236535.9U CN204559545U (en) | 2015-04-20 | 2015-04-20 | A kind of automatic correction system of wideband vector signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819533A (en) * | 2017-11-16 | 2018-03-20 | 中国人民解放军63892部队 | The signal creation method and system that a kind of no limit waveform can arbitrarily change |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819533A (en) * | 2017-11-16 | 2018-03-20 | 中国人民解放军63892部队 | The signal creation method and system that a kind of no limit waveform can arbitrarily change |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20160420 |