CN208939955U - The circuit structure of local oscillator driving function is realized based on extensive MIMO technique - Google Patents
The circuit structure of local oscillator driving function is realized based on extensive MIMO technique Download PDFInfo
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Abstract
The utility model relates to a kind of circuit structures that local oscillator driving function is realized based on extensive MIMO technique, including local oscillator module, for generating high-power RF signal；First driving circuit, the input terminal of first driving circuit are connected with the output end of the local oscillator module, for the signal constant amplitude of the local oscillator module to be mutually divided into together eight road signals；Second driving circuit group, including 8 identical second driving circuits, the input terminal of 8 second driving circuits is connected with the output end of eight tunnel output signals of first driving circuit respectively, for by the signal constant amplitude of first driving circuit with phase branch.Using the system and method, solve Massive mimo channel simulator local oscillator how assignment problem, local oscillator driving power size issue, local oscillator input phase consistency problem, keep the planning of local oscillation signal and structure distribution reasonable, it is designed with good structure, and cost is effectively controlled, there is extensive prospect of the application.
Description
Technical field
The utility model relates to instrument fields, more particularly to extensive multiple-input and multiple-output instrument field, specifically
Refer to a kind of circuit structure that local oscillator driving function is realized based on extensive MIMO technique.
Background technique
With the development of communication technology, data volume caused by people's daily life increasingly increases, smart home, artificial intelligence
The technologies such as energy and virtual reality have entered into or will enter into our life, it is followed by that data traffic requirement
Sharp increase.Existing 4G mobile communication will be unable to meet so huge data traffic transmission demand, therefore study a new generation
5G technology will be at key to solve this problem.
The key technology of 5G mobile communication mainly has the Radio Transmission Technology and high-density wireless network technology of ultra high performance.
Mainly there are Massive MIMO (extensive multiple-input and multiple-output) technology, full duplex technology and millimeter in terms of Radio Transmission Technology
Communication techniques；Mainly there are super-intensive heterogeneous network technologies, software definition wireless network in terms of radio network technique and from group
Knit network technology.
As the effective means for improving the availability of frequency spectrum and transmission reliability, MIMO technology has been used to LTE and WIFI etc.
Various wireless communication system.In general, the antenna number of transceiver assembly is more, and spectrum efficiency and channel reliability just might as well.
Base station is made multiple signals carry out in-phase stacking in receiving end, is connect to reach raising by the phase of separately adjustable every antenna
Receive the purpose of signal strength.
Massive MIMO technology is not only can promotion nothing at double by increasing the quantity of antenna in base station
The communication performance of line communication, this technology are that the system spectrum that can be improved that one kind is novel in mobile cellular net wireless communication system provides
The network design framework of source utilization rate and capacity usage ratio.
Massive mimo channel simulator is a kind of instrument as simulation Massive MIMO technology, can be simulated true
Multipath fading, delay extension, Doppler's decline in the real space etc. influence the characteristic of communication quality, to study and simulating
Massive MIMO technology provides good channel model.
It is based on a kind of 5G Massive mimo channel simulator herein, this channel simulator is 128 × 8 matrix channel moulds
Quasi- device, has 136 transceiver channels, that is, needs 136 local oscillators to drive each channel, how to give in 136 channels local oscillators are provided
Signal becomes the solution main points of this paper.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of using the combination of multichannel centimetre
Form has interpolation amplifier, realizes local oscillator driving function based on extensive MIMO technique with symmetric form
Circuit structure.
To achieve the goals above, the utility model based on extensive MIMO technique realize local oscillator drive function
The circuit structure of energy is as follows:
This realizes the circuit structure of local oscillator driving function based on extensive MIMO technique, is mainly characterized by,
The system includes local oscillator module, the first driving circuit and the second driving circuit group, the input of first driving circuit
End is connected with the output end of the local oscillator module, and the second driving circuit group includes 8 identical second driving circuits, described
The input terminals of 8 the second driving circuits be connected respectively with the output end of eight tunnel output signals of first driving circuit
It connects.
Preferably, the local oscillator module includes numerical-control attenuator, it is connected with first driving circuit.
Preferably, first driving circuit include one point of eight power divider, and one point of eight power divider with
The local oscillator module is connected.
Preferably, second driving circuit includes:
First amplifier, the input terminal of first amplifier are connected with the output end of first driving circuit
It connects；
One point of nine wideband power distributor, the input terminal of one point of nine wideband power distributor are put with described first
The output end of big device is connected；
Second amplifier group, including 9 the second amplifiers, the input terminal of 9 second amplifiers respectively with it is described
The output end of nine tunnel output signals of one point of nine wideband power distributor be connected；
One-to-two power divider group, including 9 one-to-two power dividers, 9 one-to-two power dividers
Input terminal be connected respectively with the output end of 9 second amplifiers.
Preferably, one point of nine wideband power distributor includes that two-stage one divides three unequal power distributors, with
The output end of first amplifier is connected.
Preferably, one point of three unequal power distributor uses symmetric form, and this point three not equal part power
The microstrip line form of three road signals of distributor is essentially identical.
Preferably, first driving circuit and the second driving circuit group passes through second order quarter-wave microstrip line
Connection.
Preferably, the microstrip line carries out two-stage impedance transformation by the changeover portion of narrow road microstrip line.
Preferably, the output signal of the local oscillator module is transmitted to first driving circuit by radio-frequency cable,
The output signal of first driving circuit is transmitted to the second driving circuit group by radio-frequency cable.
The circuit structure for realizing local oscillator driving function based on extensive MIMO technique using this, by base
Stand place increase antenna quantity can at double promotion wireless communication communication performance, be mobile cellular net wireless communication system
The novel network design framework that can be improved system spectral resources utilization rate and capacity usage ratio of middle one kind.Massive MIMO
Channel simulator needs 136 local oscillators to drive each transceiver channel, and 144 tunnel local oscillator of the technical program drives transceiver channel,
Solve Massive mimo channel simulator local oscillator how assignment problem, solve Massive mimo channel simulator local oscillator
Driving power size issue solves Massive mimo channel simulator local oscillator input phase consistency problem, believes local oscillator
Number and structure planning distribution rationally, have good structure design, and effectively control cost, make the technical program applicability
It is bigger, there is extensive prospect of the application.
Detailed description of the invention
Fig. 1 is the circuit structure that local oscillator driving function is realized based on extensive MIMO technique of the utility model
Schematic diagram.
Fig. 2 is the circuit structure that local oscillator driving function is realized based on extensive MIMO technique of the utility model
Circuit block diagram.
Fig. 3 is the circuit structure that local oscillator driving function is realized based on extensive MIMO technique of the utility model
The first driving circuit one point of eight power divider circuits figure.
Fig. 4 is the circuit structure that local oscillator driving function is realized based on extensive MIMO technique of the utility model
The second driving circuit one point of 18 power divider integrated circuit figure.
Fig. 5 is the circuit structure that local oscillator driving function is realized based on extensive MIMO technique of the utility model
One point of nine power divider one of the second driving circuit divide three not equal part circuit diagrams.
Fig. 6 is the circuit structure that local oscillator driving function is realized based on extensive MIMO technique of the utility model
The second driving circuit one point of nine power divider not equal part detail impedance matching portion schematic diagram.
Specific embodiment
In order to more clearly describe the technology contents of the utility model, carry out combined with specific embodiments below into one
The description of step.
This realizes circuit structure of local oscillator driving function based on extensive MIMO technique, wherein described is
System include local oscillator module, the first driving circuit and the second driving circuit group, the input terminal of first driving circuit with it is described
The output end of local oscillator module be connected, the second driving circuit group includes 8 identical second driving circuits, described 8 the
The input terminal of two driving circuits is connected with the output end of eight tunnel output signals of first driving circuit respectively.
In preferred embodiments of the present invention, the local oscillator module includes numerical-control attenuator, with described
One drive circuit is connected.
In preferred embodiments of the present invention, first driving circuit includes one point of eight power divider,
And one point of eight power divider is connected with the local oscillator module.
In preferred embodiments of the present invention, second driving circuit includes:
First amplifier, the input terminal of first amplifier are connected with the output end of first driving circuit
It connects；
One point of nine wideband power distributor, the input terminal of one point of nine wideband power distributor are put with described first
The output end of big device is connected；
Second amplifier group, including 9 the second amplifiers, the input terminal of 9 second amplifiers respectively with it is described
The output end of nine tunnel output signals of one point of nine wideband power distributor be connected；
One-to-two power divider group, including 9 one-to-two power dividers, 9 one-to-two power dividers
Input terminal be connected respectively with the output end of 9 second amplifiers.
In preferred embodiments of the present invention, one point of nine wideband power distributor includes that two-stage one is divided
Three unequal power distributors are connected with the output end of first amplifier.
In preferred embodiments of the present invention, one point of three unequal power distributor uses symmetric figure
Formula, and the microstrip line form of three road signals of one point of three unequal power distributor is essentially identical.
In preferred embodiments of the present invention, first driving circuit and the second driving circuit group pass through
The connection of second order quarter-wave microstrip line.
Wherein, the microstrip line carries out two-stage impedance transformation by the changeover portion of narrow road microstrip line.
In preferred embodiments of the present invention, the output signal of the local oscillator module is transmitted by radio-frequency cable
To first driving circuit, the output signal of first driving circuit is transmitted to described second by radio-frequency cable
Driving circuit group.
In specific embodiment of the present utility model, it is based on a kind of 5G Massive mimo channel simulator herein, this letter
Road simulator is 128 × 8 matrix channel simulators, has 136 transceiver channels, that is, 136 local oscillators is needed to drive each channel,
136 channels provide the solution main points that local oscillation signal becomes this paper in how giving.
In the technical solution of the utility model, dBm is decibel milliwatt, and dB is decibel, and GHz is girz.
Massive mimo channel simulator needs 136 local oscillators to drive each transceiver channel, sees Fig. 1.In order to reasonable
Transceiver channel, is divided into 18 one group by the planning for distributing local oscillation signal and structure in structure, and totally 8 groups, so needing one one
Divide eight local oscillator driving circuits, 7 one point 18 local oscillator driving circuits and 1 one point of ten local oscillator driving, it is contemplated that cost and structure
Design etc., drives transceiver channel using one one point eight local oscillator driving circuits and 8 one point 18 local oscillator driving circuits, altogether
144 tunnel local oscillators drive transceiver channel.
The utility model provides the local oscillator driving circuit of Massive MIMO a kind of, including local oscillator module, driving circuit
1, driving circuit 2, the utility model circuit block diagram is shown in Fig. 2.
Local oscillator module generates pure broadband and high-power RF signal, and local oscillator module has numerical-control attenuator, can be to most
The different frequency signals power exported afterwards is adjusted.
The radiofrequency signal that local oscillator module generates inputs to driving circuit 1, and driving circuit 1 is that eight power distributions are divided in broadband one
The signal constant amplitude that local oscillator module inputs mutually is divided into eight road signals together, sees Fig. 3 by device, is the whole electricity of one point of eight power divider
Road figure and Local map.
Eight tunnel output signals of driving circuit 1 input 8 identical driving circuits 2 again respectively, and driving circuit 2 is one point ten
Eight wideband power distributors, and inside guarantees local oscillation power containing amplifier.Driving circuit 2 is by amplifier, one point of nine broadband
Power divider and one-to-two power divider composition, Fig. 4 are one point of 18 power divider integrated circuit figure, there is driving circuit
The local oscillation signal of 1 input first passes through level-one amplification and carries out one point of nine power distribution again and finally lead to then using first stage amplifier
One-to-two power etc. point is crossed to export signal to the transceiver module in each channel.
In the utility model driving circuit, signal constant amplitude is mutually divided into together by the signal of local oscillator output through overdrive circuit 1 and 2
144 road oscillating driving signals, amplifier ensure that local oscillation power size, and one point of nine power divider in driving circuit 2 is set
Meter ensure that the consistency of the signal phase of signal.
In Massive mimo channel simulator, 136 tunnel local oscillators is needed to drive, is used in the design of local oscillator driving circuit
The driving output of 144 tunnel local oscillators, the local oscillator of transceiver channel drive needs >=+15dBm, then the local oscillator driving circuit designed will guarantee often
All >=+15dBm in frequency range all the way.
As shown in Fig. 2, local oscillator module by high stable crystal oscillator generate 7.5GHz~13.5GHz local oscillation signal, harmonic wave better than-
40dBc, power >=+14dBm, power can be adjusted by numerical-control attenuator therein, and attenuator range is 0~15dB.Local oscillator
The broadband signal of module output is connected to the input port of driving circuit 1 by radio-frequency cable, passes through one point of eight function of driving circuit
Signal constant amplitude is mutually divided into together eight road signals, power >=-1dBm of output by rate distributor.Driving circuit 1 export signal again by
Radio-frequency cable is input in driving circuit 2, and in input circuit 2, signal first passes through first stage amplifier, then passes through one point of nine power
Distributor is finally exported by one-to-two power divider, final output signal >=+15dBm using first stage amplifier.
As shown in figure 3, being one point of eight power divider of driving circuit 1, having a size of 32.8mm × 328.6mm, this power
Distributor uses Rogers4350B substrate, carries out impedance transformation using second order quarter-wave microstrip line, thus needed for realizing
7.5GHz~13.5GHz bandwidth.It is designed according to the structure of Massive mimo channel simulator, power divider output end
Mouth spacing is 44.5mm.Insertion Loss≤15dB of driving circuit 1, as signal power >=+14dBm of local oscillator module input, driving
Signal power >=-1dBm that circuit 1 exports.
As shown in figure 4, being the integrated circuit figure of driving circuit 2, having a size of 66.8mm × 382.5mm, wherein including amplification
Device, one point of nine power divider and one-to-two power divider.Power divider substrate equally uses Rogers4350B substrate,
And impedance transformation is carried out using second order quarter-wave microstrip line, guarantee signal bandwidth.According to Massive mimo channel mould
The transceiver channel spacing of quasi- device, one point of nine power divider input port spacing are 43mm, one-to-two power divider output end
Mouth spacing is 17.5mm.
Due to 2 output port of driving circuit be 18 tunnels output, not for 2 Nth power (N is integer), so that power
It must include odd number power distribution in the design of distributor, one point of nine power divider just be devised in this way, wherein containing two
One point of three unequal power distributor of grade, as shown in figure 5, being the part of one point of three unequal power distributor.It is supplied to transmitting-receiving
The local oscillation signal in channel needs the same phase of constant amplitude, so symmetric mode is used in one point of three unequal power distributor, i.e., three
The microstrip line form on road is essentially identical, this ensure that on this three paths signal being consistent property of phase.
In one point of nine power divider, due to wherein containing one point of three unequal power distributor, in power distribution
When micro-strip line width can be inconsistent, lead to have all the way that microstrip line can be very narrow, as shown in fig. 6, will cause the mismatch of impedance, institute in this way
To have carried out two-stage impedance transformation in narrow road the microstrip line to the end transition of microstrip line, microstrip line is broadened by narrow, so that impedance
There is good matching.
In driving circuit 2, the gain of first order amplifier is 18dB, one point of nine power divider Insertion Loss≤16dB, the
Two-stage amplifier gain is 18dB, one-to-two power divider Insertion Loss≤4dB, as the power >=-1dBm inputted by driving circuit 1
When, power >=+15dBm that driving circuit 2 finally exports ensure that the local oscillator driving of transceiver module.Meanwhile 7.5GHz~
The gain and Insertion Loss meeting difference of 13.5GHz signal output in varied situations, can pass through the numerical control for controlling local oscillator module at this time
Attenuator adjusts last output power, so that signal power is within claimed range.
Massive mimo channel simulator needs 136 local oscillators to drive each transceiver channel, 144 tunnel of the technical program
Local oscillator drives transceiver channel, solve Massive mimo channel simulator local oscillator how assignment problem, solve Massive
Mimo channel simulator local oscillator driving power size issue solves Massive mimo channel simulator local oscillator input phase one
Cause property problem makes the planning of local oscillation signal and structure distribution rationally, has the design of good structure, and effectively control cost,
Keep the technical program applicability bigger, there is extensive prospect of the application.
In this description, the utility model is described with reference to its specific embodiment.But it is clear that still can be with
The spirit and scope that various modification can be adapted and converts without departing from the utility model.Therefore, the description and the appended drawings should be considered as
It is illustrative and not restrictive.
Claims (9)
1. a kind of circuit structure for realizing local oscillator driving function based on extensive MIMO technique, which is characterized in that institute
The circuit structure stated includes local oscillator module, the first driving circuit and the second driving circuit group, first driving circuit it is defeated
Enter end to be connected with the output end of the local oscillator module, the second driving circuit group includes 8 identical second driving circuits, institute
The input terminal for 8 the second driving circuits stated is connected with the output end of eight tunnel output signals of first driving circuit respectively
It connects.
2. the circuit knot according to claim 1 for realizing local oscillator driving function based on extensive MIMO technique
Structure, which is characterized in that the local oscillator module includes numerical-control attenuator, is connected with first driving circuit.
3. the circuit knot according to claim 1 for realizing local oscillator driving function based on extensive MIMO technique
Structure, which is characterized in that first driving circuit includes one point of eight power divider, and one point of eight power divider and institute
The local oscillator module stated is connected.
4. the circuit knot according to claim 1 for realizing local oscillator driving function based on extensive MIMO technique
Structure, which is characterized in that second driving circuit includes:
First amplifier, the input terminal of first amplifier are connected with the output end of first driving circuit；
One point of nine wideband power distributor, the input terminal of one point of nine wideband power distributor and first amplifier
Output end be connected；
Second amplifier group, including 9 the second amplifiers, the input terminal of 9 second amplifiers is respectively with described one
The output end of nine tunnel output signals of nine wideband power distributors is divided to be connected；
One-to-two power divider group, including 9 one-to-two power dividers, 9 one-to-two power dividers it is defeated
Enter end to be connected with the output end of 9 second amplifiers respectively.
5. the circuit knot according to claim 4 for realizing local oscillator driving function based on extensive MIMO technique
Structure, which is characterized in that one point of nine wideband power distributor includes that two-stage one divides three unequal power distributors, with institute
The output end for the first amplifier stated is connected.
6. the circuit knot according to claim 5 for realizing local oscillator driving function based on extensive MIMO technique
Structure, which is characterized in that one point of three unequal power distributor uses symmetric form, and this point three not equal part power point
The microstrip line form of three road signals of orchestration is identical.
7. the circuit knot according to claim 1 for realizing local oscillator driving function based on extensive MIMO technique
Structure, which is characterized in that first driving circuit and the second driving circuit group passes through second order quarter-wave microstrip line
Connection.
8. according to any one of claim 1 to 7 realize that local oscillator drives function based on extensive MIMO technique
The circuit structure of energy, which is characterized in that the microstrip line carries out two-stage impedance transformation by the changeover portion of narrow road microstrip line.
9. according to any one of claim 1 to 7 realize that local oscillator drives function based on extensive MIMO technique
The circuit structure of energy, which is characterized in that the output signal of the local oscillator module is transmitted to described first by radio-frequency cable
The output signal of driving circuit, first driving circuit is transmitted to the second driving circuit group by radio-frequency cable.
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| CN201821823623.9U CN208939955U (en) | 2018-11-07 | 2018-11-07 | The circuit structure of local oscillator driving function is realized based on extensive MIMO technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120318A (en) * | 2018-11-07 | 2019-01-01 | 上海创远仪器技术股份有限公司 | The circuit structure of local oscillator driving function is realized based on extensive MIMO technique |
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2018
- 2018-11-07 CN CN201821823623.9U patent/CN208939955U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120318A (en) * | 2018-11-07 | 2019-01-01 | 上海创远仪器技术股份有限公司 | The circuit structure of local oscillator driving function is realized based on extensive MIMO technique |
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Address after: Block C, No. 7, Lane 205, Gaoji Road, Songjiang District, Shanghai, 201601 Patentee after: Chuangyuan Xinke (Shanghai) Technology Co.,Ltd. Address before: 201601 building 6, 351 sizhuan Road, Sijing Town, Songjiang District, Shanghai Patentee before: TRANSCOM INSTRUMENTS Co.,Ltd. |