CN209120191U - A kind of arbitrary waveform generator based on modelling - Google Patents
A kind of arbitrary waveform generator based on modelling Download PDFInfo
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- CN209120191U CN209120191U CN201822270069.2U CN201822270069U CN209120191U CN 209120191 U CN209120191 U CN 209120191U CN 201822270069 U CN201822270069 U CN 201822270069U CN 209120191 U CN209120191 U CN 209120191U
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Abstract
The utility model discloses a kind of arbitrary waveform generator based on modelling, including more than two up-conversion passages and waveform combiner, it further include Bram read address module identical with the quantity of the up-conversion passage, each Bram read address module connects a up-conversion passage, baseband signal is entered in the up-conversion passage after the Bram module and is modulated, and gained modulating wave concentration is input to the waveform combiner.The present embodiment, which is based on modelling, can make designer without being familiar with hardware description language, it can complete system by building for visualization model and fast implement, and integration is realized in system emulation, shorten the development cycle, development cost is saved, the design cycle of system is simplified.
Description
Technical field
The utility model relates to a kind of arbitrary waveform generator, more particularly, to a kind of based on any of modelling
Waveform generator.
Background technique
Arbitrary waveform generator is that communication equipment tests a kind of common technological means, the normal operation ring of analog machine
Border generates the input signal of a customized type, waveform and frequency, uses for tester as data source.
Traditional optional waveform generator be switched on and generated simultaneously using the signal source of multiple equipment in kind one kind or
Multiple types signal, and it is combined addition, this just needs more signal source equipments, undoubtedly increases testing cost, and operate
Complexity, flexibility are poor.Test signal, which is exported, with separate unit signal source is far from satisfying test request again.
Utility model content
To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of, and the random waveform based on modelling is sent out
Raw device realizes the modularized processing of the baseband signal of multicarrier, multichannel, spirit by visual module fast construction system
It is active strong.
The technical solution adopted by the utility model to solve the problem is as follows:
A kind of arbitrary waveform generator based on modelling, including more than two up-conversion passages and waveform combining
Device further includes Bram read address module identical with the quantity of the up-conversion passage, each Bram read address module connection one
A up-conversion passage, baseband signal are entered in the up-conversion passage after the Bram module and are modulated, gained tune
Wave concentration processed is input to the waveform combiner.
Further, the up-conversion passage includes the parameter configuration module of data, filtering interpolation module and is used to input
Baseband signal carry out frequency spectrum shift orthogonal frequency mixing module, the parameter configuration module include dds frequency control word module, increase
Beneficial coefficient module, the road base band data I and the road baseband signal Q, the dds frequency control word module are connected to the orthogonal mixing mould
The input terminal of block, the road the base band data I and the road baseband signal Q are connected to the orthogonal mixing by the filtering interpolation module
The output end of module is mixed, and gained mixing results are exported with the gain coefficient module.
It further, further include gain control module for adjusting output signal amplitude, mixing results and the gain system
The output end of digital-to-analogue block is all connected to the input terminal of the gain control module.
Further, the Bram read address module connects external Bram and is connected to the road the base band data I and base band letter
Number road Q, passes to the road the base band data I and the road baseband signal Q for the baseband signal obtained from Bram and parameter.
Further, the filtering interpolation module is the interpolation filter of two-way input and two-way output, two-way input difference
The road the base band data I and the road baseband signal Q are connected, two-way exports the interpolation baseband signal for exporting the road I and the road Q respectively described in
Orthogonal frequency mixing module.
Further, the orthogonal frequency mixing module includes Direct Digital signal frequency synthesizer, the road I is mixed combiner, the road Q is mixed
Frequency combiner and end combiner, the Direct Digital signal frequency synthesizer are connect with the parameter configuration module, described straight
Connecing digital signal frequency synthesizer includes a cosine output end and sine output end, and the cosine output end is inserted with described
The road the I output of value filtering module enters the road I and is mixed combiner, the Q of the sine output end and the filtering interpolation module
Road output enters the road Q and is mixed combiner, and the road the I mixing combiner and the road Q mixing combiner are input to the end
Combiner.
The beneficial effects of the utility model are: the utility model is based on modelling, pass through multiple up-conversion passages
A combining output end is constructed, exports a variety of different baseband signal waveforms to emulate arbitrary waveform generator, it can not only be real
The multicarrier band-wise processing of existing base band data, flexibility ratio is high, and the design method based on model can be such that designer is not necessarily to
It is familiar with hardware description language, but can completes system by building for visualization model and fast implement, and system emulation is real
Existing integration, shortens the development cycle, saves development cost, simplifies the design cycle of system.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the overall schematic of the utility model embodiment；
Fig. 2 is the specific module diagram of the up-conversion passage of the utility model embodiment.
Specific embodiment
Referring to Fig.1-2, one embodiment of the utility model provides a kind of random waveform generation based on modelling
Device, including more than two up-conversion passages 100 and waveform combiner 200 further include the quantity with the up-conversion passage 100
Identical Bram read address module 400, each Bram read address module 400 connect a up-conversion passage 100, base band letter
It number enters in the up-conversion passage 100 and to modulate after the Bram module, gained modulating wave concentration is input to the wave
Shape combiner 200.
The utility model is based on System Generator for dsp system modeling tool and builds, System
Generator is a kind of design tool that Xilinx company carries out Digital Signal Processing exploitation, has patterned interface and Pang
Big module library, and it is connectable to such as MATLAB mathematical tool or external interface, developer is without using tradition
Programming language realize that module is built, directly realized and emulated on graphic interface.The present embodiment is adapted to arbitrarily
Waveform generator builds a plurality of up-conversion passage 100, every up-conversion in System Generator for dsp system
Channel 100 connects the Bram read address module 400 all to obtain baseband waveform and control parameter, thus realize modulation,
Last modulation result is output to the waveform combiner 200, therefore developer adjusts the baseband waveform of various parameters and input,
A variety of different modulating waves can be directly obtained, to be easily accomplished exploitation.
Preferably, the random waveform that another embodiment provides for a kind of based on modelling of the utility model occurs
Device, the up-conversion passage 100 include parameter configuration module 110, filtering interpolation module 120 and the base for will input of data
Band signal carry out frequency spectrum shift orthogonal frequency mixing module 130, the parameter configuration module 110 include dds frequency control word module,
Gain coefficient module, the road base band data I and the road baseband signal Q, the dds frequency control word module are connected to the orthogonal mixing
The input terminal of module 130, the road the base band data I and the road baseband signal Q are connected to described by the filtering interpolation module 120
The output end of orthogonal frequency mixing module 130 is mixed, and gained mixing results are exported with the gain coefficient module.
The utility model shows in particular the composition of the up-conversion passage 100, wherein the parameter configuration module 110 is negative
Duty reads the data in the Bram read address module 400, configures relevant parameter, the filtering interpolation module 120 is for receiving
Baseband signal go forward side by side row interpolation filtering, the orthogonal frequency mixing module 130 according to parameter configuration generate corresponding frequencies sine and cosine carry
Wave signal is multiplied with the baseband signal of the IQ two-way of input, completes frequency spectrum shift；Wherein in the parameter configuration module 110
Parameter in the dds frequency control word module can be inputted by external equipment, can also be provided by inside, parameter is input to
In the orthogonal frequency mixing module 130；It is clear any this gives the specific structure of the single up-conversion passage 100
The overall structure of waveform generator.
Preferably, the random waveform that another embodiment provides for a kind of based on modelling of the utility model occurs
Device further includes the gain control module for adjusting output signal amplitude, the output of mixing results and the gain coefficient module
End is all connected to the input terminal of the gain control module.
Based on the above embodiment, the Bram read address module 400 connects external Bram and is connected to the base band data I
Road and the road baseband signal Q, pass to the road the base band data I and baseband signal for the baseband signal obtained from Bram and parameter
The road Q.
Parameter storage is carried out using the Bram in System Generator for dsp system in the present embodiment, it is described
Bram read address module 400 is used to read the data in Bram, sends it to the road the base band data I and the road baseband signal Q,
Sending data includes baseband waveform and control parameter.
Preferably, the random waveform that another embodiment provides for a kind of based on modelling of the utility model occurs
Device, the filtering interpolation module 120 are the interpolation filter of two-way input and two-way output, and two-way input is separately connected the base
The band road data I and the road baseband signal Q, two-way output export the interpolation baseband signal on the road I and the road Q to the orthogonal mixing mould respectively
Block 130.Mainly the clearly described filtering interpolation module 120 is FIR interpolation filter to the present embodiment.
Preferably, the random waveform that another embodiment provides for a kind of based on modelling of the utility model occurs
Device, the orthogonal frequency mixing module 130 include Direct Digital signal frequency synthesizer 131, the road I mixing combiner 132, the mixing of the road Q
Combiner 133 and end combiner 134, the Direct Digital signal frequency synthesizer 131 connect with the parameter configuration module 110
It connects, the Direct Digital signal frequency synthesizer 131 includes a cosine output end and sine output end, and the cosine is defeated
Outlet is mixed combiner 132, the sine output end and institute into the road I with the output of the road I of the filtering interpolation module 120
The road the Q output for stating filtering interpolation module 120 enters the road Q and is mixed combiner 133, the road the I mixing combiner 132 and the road Q
Mixing combiner 133 is input to the end combiner 134.
This gives the modes of combining, since baseband waveform is divided into IQ in the parameter configuration module 110
Two-way, therefore frequency modulation is carried out respectively to IQ two paths of signals respectively in the next steps, then two-way FM signal is closed again
Road mixing.
Referring to Fig.1-2, one embodiment of the utility model provides a kind of random waveform generation based on modelling
Device, including more than two up-conversion passages 100, waveform combiner 200 and oscillograph 300 further include logical with the up-conversion
The identical Bram read address module 400 of the quantity in road 100, it is logical that each Bram read address module 400 connects the up-conversion
Road 100, baseband signal are entered in the up-conversion passage 100 after the Bram module and are modulated, and gained modulating wave is concentrated
It is input to the waveform combiner 200, the output of the waveform combiner 200 is connected to the oscillograph 300.
The up-conversion passage 100 includes the parameter configuration module 110 of data, filtering interpolation module 120, is used to input
The baseband signal orthogonal frequency mixing module 130 that carries out frequency spectrum shift and gain control module for adjusting output signal amplitude,
The parameter configuration module 110 includes dds frequency control word module, gain coefficient module, the road base band data I and baseband signal Q
Road, the filtering interpolation module 120 are the interpolation filter of two-way input and two-way output, and the orthogonal frequency mixing module 130 is wrapped
Direct Digital signal frequency synthesizer 131, the road I mixing combiner 132, the road Q mixing combiner 133 and end combiner 134 are included,
Wherein:
The dds frequency control word module is connected to the input terminal of the orthogonal frequency mixing module 130 so as to input control ginseng
Number, the road the base band data I connect the two-way input of the filtering interpolation module 120, the filtering interpolation with the road baseband signal Q
The two-way output of module 120 exports the road I respectively and the interpolation baseband signal on the road Q is mixed to the road I of the orthogonal frequency mixing module 130
Combiner 132 and the road Q mixing combiner 133 are mixed, and gained mixing results and the output end of the gain coefficient module are equal
It is connected to the input terminal of the gain control module, to export the modulated signal waveform of up-conversion.
Specifically, the Direct Digital signal frequency synthesizer 131 connects frequency-modulating process with the parameter configuration module 110
It connects, the Direct Digital signal frequency synthesizer 131 includes a cosine output end and sine output end, and the cosine is defeated
Outlet is mixed combiner 132, the sine output end and institute into the road I with the output of the road I of the filtering interpolation module 120
The road the Q output for stating filtering interpolation module 120 enters the road Q and is mixed combiner 133, the road the I mixing combiner 132 and the road Q
Mixing combiner 133 is input to the end combiner 134.
The Bram read address module 400 connects external Bram and is connected to the road the base band data I and baseband signal Q
The baseband signal obtained from Bram and parameter are passed to the road the base band data I and the road baseband signal Q by road.
The baseband waveform type selected in the present embodiment has single carrier, white noise, Barker code, linear FM signal, stepping
Frequency and M sequence etc., the filtering interpolation module 120 selects the interpolation FIR filter of 61 ranks, when the rate of baseband signal is
When 20M, the data transfer rate that the base band data after filtering interpolation is 200M, the parameter configuration module configures frequency control word to make
DDS generates the carrier wave of corresponding frequencies, and FPGA system clock is 200M in the present embodiment, and the DDS frequency control word of configuration is 0.35,
The DDS carrier frequency then generated are as follows:
System clock * frequency control word=200M*0.35=70M,
Baseband signal is multiplied with the carrier signal of the frequency of the 70M, the signal after obtaining orthogonal mixing.
Multiple up-conversion passages 100 are used in the present embodiment, all up-conversion passages 100 are concentrated all last
The waveform combiner 200, the present embodiment are based on modelling, construct a combining by multiple up-conversion passages 100
Output end exports a variety of different baseband signal waveforms to emulate arbitrary waveform generator, can not only realize base band data
Multicarrier band-wise processing, flexibility ratio is high, and the design method based on model can make designer without being familiar with hardware description
Language, but can complete system by building for visualization model and fast implement, and integration is realized in system emulation, shorten
Development cycle saves development cost, simplifies the design cycle of system.
The above, the only preferred embodiment of the utility model, the utility model are not limited to above-mentioned implementation
Mode, as long as its technical effect for reaching the utility model with identical means, all should belong to the protection scope of the utility model.
Claims (6)
1. a kind of arbitrary waveform generator based on modelling, it is characterised in that: including more than two up-conversion passages and
Waveform combiner further includes Bram read address module identical with the quantity of the up-conversion passage, each Bram read address mould
Block connects a up-conversion passage, and baseband signal is entered in the up-conversion passage after the Bram module and adjusted
System, gained modulating wave concentration are input to the waveform combiner.
2. a kind of arbitrary waveform generator based on modelling according to claim 1, it is characterised in that: the upper change
Frequency channel includes that the parameter configuration module of data, filtering interpolation module and the baseband signal for that will input carry out frequency spectrum shift
Orthogonal frequency mixing module, the parameter configuration module include dds frequency control word module, gain coefficient module, the road base band data I and
The road baseband signal Q, the dds frequency control word module are connected to the input terminal of the orthogonal frequency mixing module, the base band data I
Road and the road baseband signal Q are mixed by the output end that the filtering interpolation module is connected to the orthogonal frequency mixing module, institute
Mixing results are obtained to be exported with the gain coefficient module.
3. a kind of arbitrary waveform generator based on modelling according to claim 2, it is characterised in that: further include using
In the gain control module for adjusting output signal amplitude, the output end of mixing results and the gain coefficient module is all connected to institute
State the input terminal of gain control module.
4. a kind of arbitrary waveform generator based on modelling according to claim 2, it is characterised in that: the Bram
Read address module connects external Bram and is connected to the road the base band data I and the road baseband signal Q, the base that will be obtained from Bram
Band signal and parameter pass to the road the base band data I and the road baseband signal Q.
5. a kind of arbitrary waveform generator based on modelling according to claim 2, it is characterised in that: the interpolation
Filter module is the interpolation filter of two-way input and two-way output, and two-way input is separately connected the road the base band data I and base
The road band signal Q, two-way output export the interpolation baseband signal on the road I and the road Q to the orthogonal frequency mixing module respectively.
6. a kind of arbitrary waveform generator based on modelling according to claim 2, it is characterised in that: described orthogonal
Frequency mixing module includes Direct Digital signal frequency synthesizer, the road I mixing combiner, the road Q mixing combiner and end combiner, institute
It states Direct Digital signal frequency synthesizer to connect with the parameter configuration module, the Direct Digital signal frequency synthesizer includes
The road I of one cosine output end and sine output end, the cosine output end and the filtering interpolation module, which exports, to be entered
The road I is mixed combiner, and the sine output end is mixed conjunction into the road Q with the output of the road Q of the filtering interpolation module
Road device, the road the I mixing combiner and the road Q mixing combiner are input to the end combiner.
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| CN201822270069.2U CN209120191U (en) | 2018-12-29 | 2018-12-29 | A kind of arbitrary waveform generator based on modelling |
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| CN201822270069.2U CN209120191U (en) | 2018-12-29 | 2018-12-29 | A kind of arbitrary waveform generator based on modelling |
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Address after: 211135 floor 1-3, auxiliary building, building 6, artificial intelligence Industrial Park, Nanjing City, Jiangsu Province Patentee after: Zhongke Nanjing mobile communication and computing Innovation Research Institute Address before: 211135 3rd floor, building 6, no.266 Chuangyan Road, Qilin high tech Zone, Nanjing City, Jiangsu Province Patentee before: INSTITUTE OF COMPUTING TECHNOLOGY, CHINESE ACADEMY OF SCIENCES, NANJING INSTITUTE OF MOBILE COMMUNICATIONS AND COMPUTING INNOVATION |
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