CN107465635A - A kind of multipath channel simulation system and method - Google Patents
A kind of multipath channel simulation system and method Download PDFInfo
- Publication number
- CN107465635A CN107465635A CN201710565319.2A CN201710565319A CN107465635A CN 107465635 A CN107465635 A CN 107465635A CN 201710565319 A CN201710565319 A CN 201710565319A CN 107465635 A CN107465635 A CN 107465635A
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- China
- Prior art keywords
- signal
- multipath channel
- attenuator
- delay line
- channel simulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The present invention relates to a kind of multipath channel simulation system, including signal generation device (1), signal separator (2), signal propagation device and the multiple signal receiving devices (6) being sequentially connected, described signal propagation device includes n bars propagation path parallel with one another and independent, attenuator (3), phase shifter (4) and delay line (5) are equipped with per paths, described signal separator (2), attenuator (3), phase shifter (4), delay line (5) and corresponding signal receiving device (6) are sequentially connected.Compared with prior art, the emulation to the multipath channel of radio communication multipath can be achieved in the present invention, and can realize its influence to multipath effect from the angle of individual paths, has the advantages of structure is concise, simple to operate.
Description
Technical field
The present invention relates to a kind of wireless signal analogue system, more particularly, to a kind of multipath channel simulation system and method.
Background technology
Radio communication turns into the main flow to communicate now because it moves convenience.The quality and performance of wireless communication transmissions are straight
The quality for affecting the signal that user terminal is received is connect, influences satisfaction of users.In wireless communication transmissions, ambient
Body all affects the signal quality of radio communication to stop, absorption, reflection, scattering etc. caused by communication electromagnetism ripple.Due to reality
Communication scenes it is more complicated, signal that user terminal can receive is typically all to be transmitted by mulitpath.Together
One transmitting signal passes through different path transmissions, and receiving terminal is reached with the small time difference, and is interfered in receiving terminal, here it is
Multipath effect.In multipath effect, power attenuation, signal phase shift and the time delay of different path signals are general also different, cause
The random change of the reception resultant field of user terminal, makes transmission signal produce fast-fading, and this quick degree is depended on from more
The bandwidth of the intensity of footpath signal, relative time delay and transmitting signal.In wireless communications, multipath effect research has to signal transmission
Highly important meaning.
In channel estimation, signal measurement is first carried out in reality scene, then the signal of measurement is post-processed, carried
Multipath parameter information is taken, what this was completed is the measurement and estimation to multipath channel, without realizing the emulation to multipath channel.
In patent CN202172412U, the separation method between signal and noise that will be received is realized, then carries out signalling channel and noisy communication channel
Simulation process, do not refer to and channel simulator is carried out to multipath.The present invention is different, realizes to multipath channel simulation, can
To realize its influence to multipath effect from the angle of individual paths, the research to multipath effect have very big help and
Meaning.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is directed to multipath effect
Multipath channel simulation system and method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of multipath channel simulation system, including the signal generation device, signal separator, the signal that are sequentially connected are propagated
Device and multiple signal receiving devices, described signal propagation device include propagation path a plurality of parallel with one another and independent, often
Be equipped with attenuator, phase shifter and delay line on paths, described signal separator, attenuator, phase shifter, delay line and
Corresponding signal receiving device is sequentially connected.
Caused signal is carried out power coupling, identical signal of the integrated separation into multichannel by described signal separator.
Preferably, described attenuator is realized using active attenuator.The effect of attenuator is that the amplitude of control signal increases
Benefit.Active attenuator is a kind of attenuator for needing external power supply, and active attenuator and other adjustable resistance elements are combined into can
Become attenuator, be assemblied in the gain that can be realized in amplifier to signal, and be continuously adjustabe.
Preferably, described phase shifter is realized using transistor circuit.The effect of phase shifter is by the phase shift of signal
One angle.A control signal is added to realize the change of phase shift in the input of transistor circuit.
Preferably, described delay line is realized using lc circuit delay line.The effect of delay line is when realizing to signal
Between postpone.The inductance capacitance of continuously adjustabe is accessed in lc circuit, adjusts inductance and electric capacity, realizes different signal delays.
Preferably, described signal receiving device has single receiving channel for the signal in different paths, and in the future
Signal synthesis is carried out from the signal in different paths.
A kind of multipath channel simulation method, including：Signal generation device is by caused signal input signal separator, letter
Number separator carries out power coupling to signal, separates to more than 2 different paths, and process declines the signal on each path successively
Subtract device, phase shifter and delay line to be received by corresponding signal receiving device.
The parameter of described attenuator, phase shifter and delay line is customized parameter.
Compared with prior art, the emulation to the multipath channel of radio communication multipath can be achieved in the present invention, and can be real
Now its influence to multipath effect from the angle of individual paths, when observing influence of a certain paths to whole signal,
The parameter constant in other paths is kept, only individually adjusts the numerical value of attenuator on the paths, phase shifter and delay line,
The change of the signal of the middle synthesis of observation signal reception device, the influence that the paths change multipair signal is just embodied, is had
The advantages of structure is concise, simple to operate.
Brief description of the drawings
Fig. 1 is the structural representation of analogue system of the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
As shown in figure 1, a kind of multipath channel simulation system, including：
Signal generation device 1, produce signal.
Signal separator 2, the signal launched is handled, isolate the signal in a plurality of different paths, at least divide
Separate out the signal in two different paths.
Multiple signals attenuator 3, adjustable attenuation is carried out to multiple signals.
Multiple signals phase shifter 4, phase shifting control is carried out to multiple signals.
Multiple signals delay line 5, delays time to control is carried out to multiple signals.
Signal receiving device 6, receive the signal to come by multipath transmisstion.
Signal generation device 1 enters in caused signal input signal separator 2 through signal separator 2 to signal
Row power couples, and integrated separation at least isolates the signal in two different paths, these are different into the signal in multiple different paths
The signal in path is transferred in the phantom channel in each path, successively by adjustable attenuator 3, shifting in the phantom channel in each path
Phase device 4, delay line 5, finally received by multiple signal receiving devices 6.It is by adjusting each outlet openings in simulation process
In attenuator, phase shifter, the value of delay line realize multipath channel simulation, the result of emulation regulation each time is all by body
In signal received by present signal receiving device 6, the signal received from signal receiving device 6 can estimate this road
Influence of the footpath signal to multipath effect.When observing influence of a certain paths to whole signal, the parameter in other paths is kept
It is constant, the numerical value of attenuator on the paths, phase shifter and delay line is only individually adjusted, observation signal reception device
The change of the signal of middle synthesis, just embody the influence that the paths change multipair signal.
Claims (8)
1. a kind of multipath channel simulation system, it is characterised in that including signal generation device (1), the Signal separator being sequentially connected
Device (2), signal propagation device and multiple signal receiving devices (6), described signal propagation device include a plurality of parallel with one another
And independent propagation path, attenuator (3), phase shifter (4) and delay line (5), described signal point are often equipped with paths
It is sequentially connected from device (2), attenuator (3), phase shifter (4), delay line (5) and corresponding signal receiving device (6).
2. a kind of multipath channel simulation system according to claim 1, it is characterised in that described signal separator will
Caused signal carries out power coupling, identical signal of the integrated separation into multichannel.
3. a kind of multipath channel simulation system according to claim 1, it is characterised in that described attenuator (3) uses
Active attenuator is realized.
4. a kind of multipath channel simulation system according to claim 1, it is characterised in that described phase shifter (4) uses
Transistor circuit is realized.
5. a kind of multipath channel simulation system according to claim 1, it is characterised in that described delay line (5) uses
Lc circuit delay line is realized.
A kind of 6. multipath channel simulation system according to claim 1, it is characterised in that described signal receiving device
(6) signal for different paths has single receiving channel, and the signal from different paths is carried out into signal synthesis.
A kind of 7. multipath channel simulation method, it is characterised in that including：Caused signal is passed to letter by signal generation device (1)
Number separator (2), signal separator (2) carry out power coupling to signal, separated to more than 2 different paths, each road
Signal on footpath is received by attenuator (3), phase shifter (4) and delay line (5) by corresponding signal receiving device (6) successively.
8. a kind of multipath channel simulation method according to claim 6, it is characterised in that described attenuator (3), phase shift
The parameter of device (4) and delay line (5) is customized parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710565319.2A CN107465635A (en) | 2017-07-12 | 2017-07-12 | A kind of multipath channel simulation system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710565319.2A CN107465635A (en) | 2017-07-12 | 2017-07-12 | A kind of multipath channel simulation system and method |
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| Publication Number | Publication Date |
|---|---|
| CN107465635A true CN107465635A (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710565319.2A Pending CN107465635A (en) | 2017-07-12 | 2017-07-12 | A kind of multipath channel simulation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130670A (en) * | 2020-01-15 | 2020-05-08 | 西安电子科技大学 | Signal path signal transmission system, method and device for wireless channel experiment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI223510B (en) * | 2003-08-12 | 2004-11-01 | Accton Technology Corp | System and method for multi-path simulation |
| US20050085223A1 (en) * | 2003-10-20 | 2005-04-21 | Accton Technology Corporation | System and method for multi-path simulation |
| CN1702986A (en) * | 2005-07-15 | 2005-11-30 | 清华大学 | Baseband multi-path fading channel simulator |
| CN201207650Y (en) * | 2008-04-15 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Multi-path simulation system |
-
2017
- 2017-07-12 CN CN201710565319.2A patent/CN107465635A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI223510B (en) * | 2003-08-12 | 2004-11-01 | Accton Technology Corp | System and method for multi-path simulation |
| US20050085223A1 (en) * | 2003-10-20 | 2005-04-21 | Accton Technology Corporation | System and method for multi-path simulation |
| CN1702986A (en) * | 2005-07-15 | 2005-11-30 | 清华大学 | Baseband multi-path fading channel simulator |
| CN201207650Y (en) * | 2008-04-15 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Multi-path simulation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130670A (en) * | 2020-01-15 | 2020-05-08 | 西安电子科技大学 | Signal path signal transmission system, method and device for wireless channel experiment |
| CN111130670B (en) * | 2020-01-15 | 2024-05-14 | 西安电子科技大学 | Signal path signal transmission system and method for wireless channel experiment |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171212 |
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| RJ01 | Rejection of invention patent application after publication |