CN108494502A - A kind of TD-SCDMA signal downlinks Self-excitation Detection method and system - Google Patents
A kind of TD-SCDMA signal downlinks Self-excitation Detection method and system Download PDFInfo
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- CN108494502A CN108494502A CN201810262031.2A CN201810262031A CN108494502A CN 108494502 A CN108494502 A CN 108494502A CN 201810262031 A CN201810262031 A CN 201810262031A CN 108494502 A CN108494502 A CN 108494502A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
- H04B17/19—Self-testing arrangements
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Abstract
The invention discloses a kind of TD SCDMA signal downlinks Self-excitation Detection method and system, method includes the following steps：The first TD SCDMA downlink signals that downlink radio frequency module is transmitted to the first RF switch are obtained, and first voltage analog signal is exported according to the first TD SCDMA downlink signals；The minimum power of the first TD SCDMA downlink signals obtained according to the first voltage analog signal is compared with predetermined power threshold value, to export control signal；When the control signal is closing control signal, the switch module of control connection power circuit disconnects, to close the power supply of the downlink radio frequency module, the Self-excitation Detection of circuit can be carried out automatically, and it is reacted in time after self-excitation phenomena occurs, circuit is cut off, avoids impacting surrounding communication and equipment of itself.
Description
Technical field
The present invention relates to circuit detection field more particularly to a kind of TD-SCDMA signal downlinks Self-excitation Detection method and it is
System.
Background technology
With quickly propelling for urbanization process, the swift and violent development at full speed of present mobile communication, people are to mobile radio communication
The requirement of network quality and data transmission is higher and higher.In the occasions such as building low layer, market place builet below the ground, underground parking, shape
At the blind area and shadow region of mobile communication.In conference and exhibition center, the places such as large-scale stadium, due to crowded, telephone traffic
Height, will not only solve signal covering problem, also need to solve capacity problem.Therefore room can not be solved only by outdoor base station covering
Interior signal problem, it is necessary to which problems could be solved by indoor covering system.Signal expires lattice treasured, and as solving, system chambers are interior to be believed
One of the mode of number covering, have many advantages, such as it is simple in structure, cheap, quick for installation, be easy to safeguard and be widely used.
It is signal coverage enhancement equipment that signal, which expires lattice treasured, can support a mould or the multimode signal in 2G/3G/4G, is effectively solved
Certainly indoor weak covering problem is suitable for the scenes such as the underground space, bottom commerce, residential households, office, elevator, have it is at low cost,
The advantages such as deployment fast, reliable in quality, signal stabilization.
Signal expires the input of lattice treasured, output is same frequency equipment, alms giver and retransmitting antenna isolation it is bad, will result in and be
It unites self-excitation, simplicity of explanation is exactly, and the donor antenna that signal expire lattice treasured has received the signal of retransmitting antenna using signal to expire lattice precious
Amplification, is exported by retransmitting antenna, and such vicious circle, consequence is equipment damage, is with the phenomenon that mobile phone test, receives letter
It is number good, do not show phone.Former net is caused to seriously affect from goading into action if signal expires lattice treasured, the receiving for influencing neighbouring base station is sensitive
Degree, the coverage area of base station will greatly reduce.It, can be big by the destruction of interference since the work antenna that signal expires lattice treasured is higher
Area expands.
The self-excitation test that the prior art expires lattice treasured for signal is mainly conversed in project installation and commissioning with mobile phone test
Quality checks that mobile phone receives power, or tests frequency spectrum with frequency spectrograph, if in-site installation has self-excitation phenomena, field adjustable alms giver
The direction and isolation etc of antenna and retransmitting antenna.
During implementing the embodiment of the present invention, inventor has found：The prior art is only carried out in project installation and commissioning
Self-excitation Detection, but equipment have in actual use the uncertain factors such as some weather, artificial change antenna direction,
Occurring some failures inside isolation and equipment causes equipment self-excitation phenomena occur, and at this moment engineering staff cannot rush to existing in time
, it can affect to the communication of surrounding, or even the equipment for damaging itself circuit.
Invention content
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of TD-SCDMA signal downlinks Self-excitation Detection method and being
System, can carry out the Self-excitation Detection of circuit, and reacted in time after self-excitation phenomena occurs automatically, cut off circuit, avoid to surrounding
Communication and equipment of itself impact.
In a first aspect, an embodiment of the present invention provides a kind of TD-SCDMA signal downlinks Self-excitation Detection method, including it is following
Step：
Obtain the first TD-SCDMA downlink signals that are transmitted to the first RF switch of downlink radio frequency module, and according to described the
One TD-SCDMA downlink signals export first voltage analog signal；
By the minimum power of the first TD-SCDMA downlink signals obtained according to the first voltage analog signal with
Predetermined power threshold value is compared, to export control signal；
When the control signal is closing control signal, the switch module of control connection power circuit disconnects, to close
The power supply of the downlink radio frequency module.
In the first realization method of first aspect, it is described will according to the first voltage analog signal obtain described in
The minimum power of first TD-SCDMA downlink signals is compared with predetermined power threshold value, to export control signal, is specifically included：
The power of the first TD-SCDMA downlink signals is sampled according to the first voltage analog signal of reception；Its
In, the sampling interval is set as T, T ＜ 37.5 μ s, sampling time 5ms；
Obtain the minimum power in the power of the first TD-SCDMA downlink signals of sampling；
When the difference of the minimum power and predetermined power threshold value is more than 0, closing control signal is exported.
According to the first realization method of first aspect, in second of realization method of first aspect, the default work(
The setting of rate threshold value includes：
Expire lattice Bao'an in signal and fill and debug success, and when ensuring that speech quality is normal：
The 2nd TD-SCDMA downlink signals that downlink radio frequency module is transmitted to first RF switch are obtained, and according to institute
State the 2nd TD-SCDMA downlink signals output second voltage analog signal；
The power of the 2nd TD-SCDMA downlink signals is sampled according to the second voltage analog signal of reception；Its
In, the sampling interval is set as T, T ＜ 37.5 μ s, sampling time 5ms；
Set the maximum power in the power of the 2nd TD-SCDMA downlink signals of sampling to predetermined power threshold value.
Further include in the third realization method of first aspect according to the first realization method of first aspect：
The downlink switching signal of receiving modem transmission, and penetrated according to downlink switching signal switching described first
Frequency switch and the second RF switch, to be switched to the downlink radio frequency module；
The 3rd TD-SCDMA downlink signals transmitted by second RF switch are obtained, are penetrated by the downlink
Frequency module carries out radiofrequency signal processing to the 3rd TD-SCDMA downlink signals, is believed with generating the first TD-SCDMA downlinks
Number.
Further include in the 4th kind of realization method of first aspect according to the third realization method of first aspect：
Receive the uplink switching signal of modem transmission, and according to uplink switching signal switching described the
One RF switch and second RF switch, to be switched to upstream radio-frequency module；
The first TD-SCDMA uplink signals transmitted by first RF switch are obtained, upstream radio-frequency module pair is passed through
The first TD-SCDMA uplink signals carry out radiofrequency signal processing, to generate the 2nd TD-SCDMA uplink signals；
The 2nd TD-SCDMA uplink signals are sent to the second RF switch by the upstream radio-frequency module；
Then described when the control signal is closing control signal, the switch module of control connection power circuit disconnects,
To close the power supply of the downlink radio frequency module, specially：
When the control signal is closing control signal, the switch module of control connection power circuit disconnects, to close
The power supply of the downlink radio frequency module and the upstream radio-frequency module.
It is described to open in the 5th kind of realization method of first aspect according to any of the above realization method of first aspect
Pass module is power MOS field effect transistor.
According to the 5th of first aspect the kind of realization method, in the 6th kind of realization method of first aspect, the power supply electricity
Road includes switching power circuit, voltage-stabilized power supply circuit, stabilized current supply circuit, power power-supply circuit, inverter power circuit, DC-DC
Any one in power circuit and protection power source circuit.
An embodiment of the present invention provides a kind of TD-SCDMA signal downlinks Self-excitation Detection system, including power detector, under
Row radio-frequency module, the first RF switch, central processing unit, power circuit and switch module；
The power detector, for obtaining under the first TD-SCDMA that downlink radio frequency module is transmitted to the first RF switch
Row signal, and first voltage analog signal is exported to the central processing unit according to the first TD-SCDMA downlink signals；
The central processing unit, for will be under the first TD-SCDMA that be obtained according to the first voltage analog signal
The minimum power of row signal is compared with predetermined power threshold value, to export control signal to the switch module；When the control
When signal processed is closing control signal, the switch module that control connects the power circuit disconnects；
The switch module, for being disconnected according to the closing control signal, to close the electricity of the downlink radio frequency module
Source.
Further include modem and the second RF switch in the first realization method of second aspect；
The central processing unit is additionally operable to receive the downlink switching signal of the modem transmission, and according to described
Downlink switching signal switches first RF switch and second RF switch, to be switched to the downlink radio frequency module；
The downlink radio frequency module, for obtaining under the 3rd TD-SCDMA transmitted by second RF switch
Row signal carries out radiofrequency signal processing, to generate the first TD-SCDMA downlinks to the 3rd TD-SCDMA downlink signals
The first TD-SCDMA downlink signals are transferred to first RF switch and the power detector by signal.
In second of realization method of second aspect further include uplink according to the first realization method of second aspect
Radio-frequency module；
The central processing unit is additionally operable to receive the uplink switching signal of the modem transmission, and according to described
Uplink switching signal switches first RF switch and second RF switch, to be switched to the upstream radio-frequency module；
The upstream radio-frequency module, for obtaining the first TD-SCDMA uplinks letter transmitted by first RF switch
Number, radiofrequency signal processing is carried out to the first TD-SCDMA uplink signals, to generate the 2nd TD-SCDMA uplink signals, by institute
It states the 2nd TD-SCDMA uplink signals and is sent to the second RF switch；
The switch module is specifically used for being disconnected according to the closing control signal, to close the downlink radio frequency module
And the power supply of the upstream radio-frequency module.
An embodiment of the present invention provides a kind of TD-SCDMA signal downlinks Self-excitation Detection method and system, have following beneficial
Effect：
The first TD-SCDMA downlink signals that downlink radio frequency module is transmitted to the first RF switch are obtained first, and according to institute
The first TD-SCDMA downlink signals output first voltage analog signal is stated, then will be obtained according to the first voltage analog signal
The minimum powers of the first TD-SCDMA downlink signals be compared with predetermined power threshold value, to export control signal, when
When the control signal is closing control signal, the switch module of control connection power circuit disconnects, and is penetrated with closing the downlink
The power supply of frequency module is detecting that central processing unit control is connect with the power circuit when downlink self-excitation phenomena occurs
The switch module disconnects, to stop power supply of the power circuit to entire TD-SCDMA signal downlinks Self-excitation Detection circuit,
The self-excitation link of timely pass hull closure avoids communicating the equipment for impacting, while being also beneficial to protection system to surrounding, extend
The service life of equipment saves equipment cost and human cost.
Description of the drawings
In order to illustrate more clearly of technical scheme of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is the flow diagram for the TD-SCDMA signal downlink Self-excitation Detection methods that first embodiment of the invention provides.
Fig. 2 is the schematic diagram of the time slot configuration for the TD-SCDMA signals that first embodiment of the invention provides.
Fig. 3 is the structural schematic diagram for the TD-SCDMA signal downlink Self-excitation Detection systems that fourth embodiment of the invention provides.
Fig. 4 is the schematic diagram for the downlink radio frequency module that fourth embodiment of the invention provides.
Fig. 5 is the schematic diagram for the upstream radio-frequency module that fourth embodiment of the invention provides.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 please be participate in, an embodiment of the present invention provides a kind of TD-SCDMA signal downlinks Self-excitation Detection method, including it is following
Step：
S11 obtains the first TD-SCDMA downlink signals that downlink radio frequency module is transmitted to the first RF switch, and according to institute
State the first TD-SCDMA downlink signals output first voltage analog signal.
In embodiments of the present invention, power detector is to receive radio-frequency input signals, output and input radio frequency signal power
The component of corresponding voltage；RF switch is used as radio signal transmission path reception/transmitting, Frequency Band Selection or antenna point
The switching of collection, while can ensure the isolation between reception/transmitting link.
In embodiments of the present invention, the power detector is used to execute step in S11, obtain downlink radio frequency module to
The first TD-SCDMA (TD SDMA) downlink signal of first RF switch transmission, then according to the first TD-
SCDMA downlink signals export first voltage analog signal, and by the first voltage analog signal transmission to central processing unit.
S12, by the least work of the first TD-SCDMA downlink signals obtained according to the first voltage analog signal
Rate is compared with predetermined power threshold value, to export control signal.
In embodiments of the present invention, referring to Fig. 2, TD-SCDMA (TD SDMA) uses wireless frame structure,
One radio frames (Radio Frame) long 10ms, spreading rate 1.28MChips, are divided into the subframe of 2 5ms, a subframe
(Subframe) long 5ms, spreading rate 6400Chips, including 7 regular time slots TS0~TS6,3 special time slot DwPTS
(descending pilot frequency time slot), GP, UpPTS (uplink pilot time slot), when RF switch is switched to downlink radio frequency circuit, determination passes through
The time slot of downlink radio frequency circuit has TS0, DwPTS and TS1, wherein TS0 to include the protection time slot of 12.5us, and DwPTS includes 25us
Protection time slot.Time slot where base station downlink signal is TS0 (the protection time slot for not including 12.5us),
12.5us in DwPTS (the protection time slot for not including 25us), TS0 (the protection time slot for not including 12.5us), TSO
Time slot is protected, is during this period of time no base station signal although the 25us in DwPTS protects time slot in descending time slot
Pass through, so the signal strength detected is made an uproar with equipment bottom (very low) as being, when there are self-excitation situations for equipment downlink
When, because self-excitation signal is continuous CW signals, the power of the signal strength and other descending time slots of two protection time slots
When it is equally high, the present invention using the two protection time slots performance number come judge equipment whether self-excitation.
In embodiments of the present invention, in the debugging rank for the equipment for running the TD-SCDMA signal downlinks Self-excitation Detection method
Section, the setting of the predetermined power threshold value include：Expire after lattice Bao'an fills and debug successfully in signal, with TD-SCDMA standard mobile phones
When making a phone call and confirming speech quality there is no problem：When the modem parsing TD-SCDMA signal uplink and downlink switching
Between, downlink switching signal is sent to the central processing unit, the central processing unit is cut according to the downlink switching signal received
First RF switch and second RF switch are changed, to be switched to the downlink radio frequency module, the second RF switch is logical
It crosses the ports BS and receives the 4th TD-SCDMA downlink signals of Base Transmitter, and the 4th TD-SCDMA downlink signals are transferred to
The downlink radio frequency module, then the 4th TD-SCDMA downlink signals after the downlink radio frequency resume module by exporting
2nd TD-SCDMA downlink signals, the power detector obtain second that downlink radio frequency module is transmitted to the first RF switch
TD-SCDMA downlink signals, and second voltage analog signal is exported according to the 2nd TD-SCDMA downlink signals, by described the
Two voltage analog signals are sent to the central processing unit, and central processing unit is adopted according to the second voltage analog signal of reception
The power of 2nd TD-SCDMA downlink signals described in sample, sampling interval are set as T, T ＜ 37.5 μ s, and sampling time 5ms will be sampled
The 2nd TD-SCDMA downlink signals power in maximum power be set as predetermined power threshold value, it should be noted that
The predetermined power threshold value is time slot signal power.
In embodiments of the present invention, central processing unit (CPU) is one piece of ultra-large integrated circuit, includes mainly operation
Device (ALU, Arithmetic and Logic Unit) and two big component of controller (CU, Control Unit), in addition, also wrapping
It includes several registers and cache memory and realizes the bus of the data contacted between them, control and state.
In embodiments of the present invention, specifically, in actual use, described in the central processing unit (CPU) receives
The first voltage analog signal of power detector transmission samples described first according to the first voltage analog signal of reception
The power of TD-SCDMA downlink signals, sampling interval are set as T, and 37.5 μ s of T ＜, sampling time 5ms, the sampling time is a son
Then the length of frame obtains the minimum power in the power of the first TD-SCDMA downlink signals of sampling, when the minimum
When power and the difference of predetermined power threshold value are more than 0, i.e. protection interval power and the difference of time slot signal power is more than 0, if most
Small-power is Pmix, predetermined power threshold value is Pmax, the difference of the two is Pn, Pn＞ ＞ 0 show that self-excitation phenomena has occurred, described
Central processing unit exports closing control signal；If PnIt is unsatisfactory for Pn＞ ＞ 0, then the central processing unit repetition above step continuation
The voltage analog signal of the power detector transmission is sampled to be judged.
S13, when the control signal is closing control signal, the switch module of control connection power circuit disconnects, with
Close the power supply of the downlink radio frequency module.
In embodiments of the present invention, the central processing unit exports closing control signal, institute when detecting equipment self-excitation
Switch module is stated to be disconnected according to the closing control signal, to close the power supply of downlink radio frequency module and upstream radio-frequency module, from
And make entire TD-SCDMA signal downlinks Self-excitation Detection circuit out of service, avoid equipment self-excitation from damaging equipment；Institute
State switch module be power MOS field effect transistor, the power MOS field effect transistor be by metal, oxide (SiO2 or
SiN) and device made of three kinds of materials of semiconductor, it is larger to refer to that it can be exported for so-called power MOSFET (Power MOSFET)
Operating current (a few peace arrive dozens of Ann), is used for the device of power output stage, power MOS field effect transistor be mainly used for it is linear or
Switching Power Supply；The power circuit refers to the circuit design for the power unit for being supplied to electrical equipment supply of electric power, the electricity used
Road form and feature, it can be switching power circuit, regulated power supply electricity that existing AC power, which also has DC power supply, the power circuit,
It is arbitrary in road, stabilized current supply circuit, power power-supply circuit, inverter power circuit, DC-DC power source circuit and protection power source circuit
It is a kind of.
In conclusion first embodiment of the invention provides a kind of TD-SCDMA signal downlinks Self-excitation Detection method, first
The first TD-SCDMA downlink signals that downlink radio frequency module is transmitted to the first RF switch are obtained, and according to the first TD-
SCDMA downlink signals export first voltage analog signal, described the then will obtained according to the first voltage analog signal
The minimum power of one TD-SCDMA downlink signals is compared with predetermined power threshold value, to export control signal, when the control
When signal is closing control signal, the switch module of control connection power circuit disconnects, to close the downlink radio frequency module
Power supply, when equipment state is good, sampled signal expires the base station signal in the TD-SCDMA descending time slots in lattice treasured as one
12.5us in reference value, then TS0 when to work protects time slot, and the 25us protection time slot power values in DwPTS are as comparing
Value, by comparing value reference value between relationship judge equipment whether self-excitation, detect generation downlink self-excitation phenomena when, in
The switch module that central processor control is connect with the power circuit disconnects, to stop the power circuit to entire TD-
The power supply of SCDMA signal downlink Self-excitation Detection circuits, the self-excitation link of timely pass hull closure avoid causing shadow to surrounding communication
It rings, while the equipment for being also beneficial to protection system, extends the service life of equipment, save equipment cost and human cost.
In order to facilitate the understanding of the present invention, some currently preferred embodiments of the present invention will be done and will further be retouched below
It states.
Second embodiment of the invention：
On the basis of first embodiment of the invention, further include：
The downlink switching signal of receiving modem transmission, and penetrated according to downlink switching signal switching described first
Frequency switch and the second RF switch, to be switched to the downlink radio frequency module.
The 3rd TD-SCDMA downlink signals transmitted by second RF switch are obtained, are penetrated by the downlink
Frequency module carries out radiofrequency signal processing to the 3rd TD-SCDMA downlink signals, is believed with generating the first TD-SCDMA downlinks
Number.
In embodiments of the present invention, the modem be on a kind of digital signal modulated to carrier wave to be transmitted or
It is defeated to be exactly converted into phone line by the device that digital signal is separated from carrier wave, so-called modulation for digital signal
Analog signal；Analog signal, i.e., be converted into digital signal, be collectively referred to as modem by demodulation.It will by modulating in transmitting terminal
Digital signal is converted to analog signal, converts analog signals into digital signal again by demodulation in receiving terminal, needs to illustrate
It is that the modem is TD-SCDMA standards.
In embodiments of the present invention, the modem couples TD-SCDMA downlink signals and parses uplink and downlink switching
Time, to output signal to central processing unit.
In embodiments of the present invention, the modem parses uplink and downlink switching time, defeated to the central processing unit
Go out downlink switching signal, the central processing unit receives the downlink switching signal of the modem transmission, and according to described
Downlink switching signal switches first RF switch and second RF switch, to be switched to the downlink radio frequency module,
It carries out TD-SCDMA downlink signal processing stages, the 3rd TD-SCDMA downlink signals that TD-SCDMA base station is sent pass through the ports BS
It is sent to second RF switch, then the 3rd TD-SCDMA downlink signals of transmission are transferred to by second RF switch
The downlink radio frequency module, the downlink radio frequency module obtain the 3rd TD- transmitted by second RF switch
SCDMA downlink signals carry out radiofrequency signal processing, to generate the first TD- to the 3rd TD-SCDMA downlink signals
Then the first TD-SCDMA downlink signals are transferred to first RF switch and the power by SCDMA downlink signals
Detector.
In embodiments of the present invention, the downlink radio frequency module includes the first low-noise amplifier, the first SAW filter
And the first RF power amplification pipe；The very low amplifier of low-noise amplifier, that is, noise coefficient is used as the height of all kinds of radio receivers
Frequency or intermediate-frequency preamplifier, and highly sensitive electron detection equipment amplifying circuit；SAW filter (SAW) is to utilize pressure
The input signal of electric wave is converted into machinery by the piezoelectric property of electric material using input with output transducer (Transducer)
Can, after treatment, then the signal of electricity is converted mechanical energy into, to reach the unnecessary signal of filtering and noise, promotes reception
The target of quality is widely used in various wireless telecommunication systems, television set, recorder and GPS and receives
LC resonance circuit is substituted on device, is used for interstage coupling and filtering.Main function is noise to filter, than traditional LC filters
Simpler, volume smaller is installed；RF power amplification pipe is also known as power amplifier (power amplifier), refers in given distortion
Under the conditions of rate, maximum power output can be generated to drive the amplifier of a certain load, radio-frequency power amplifier (RF PA) is various
The important component of wireless transmitter, in order to obtain sufficiently large radio frequency power output, it is necessary to radio-frequency power amplifier is used,
The key technical indexes of radio-frequency power amplifier is output power and efficiency, and in addition to this, the harmonic component in output is as far as possible
It is small, to avoid to other channels generate interference.
Third embodiment of the invention：
On the basis of second embodiment of the invention, further include：
Receive the uplink switching signal of modem transmission, and according to uplink switching signal switching described the
One RF switch and second RF switch, to be switched to upstream radio-frequency module.
The first TD-SCDMA uplink signals transmitted by first RF switch are obtained, upstream radio-frequency module pair is passed through
The first TD-SCDMA uplink signals carry out radiofrequency signal processing, to generate the 2nd TD-SCDMA uplink signals.
The 2nd TD-SCDMA uplink signals are sent to the second RF switch by the upstream radio-frequency module.
In embodiments of the present invention, the modem parses uplink and downlink switching time, defeated to the central processing unit
Go out uplink switching signal, the central processing unit receives the uplink switching signal of the modem transmission, and according to described
Uplink switching signal switches first RF switch and second RF switch, to be switched to the upstream radio-frequency module,
TD-SCDMA uplink signal processing stages are carried out, the first TD-SCDMA uplink signals of handset emissions pass through transmission by the ports MS
To first RF switch, then first RF switch by the first TD-SCDMA uplink signal transmissions of transmission to described
Upstream radio-frequency module, the upstream radio-frequency module obtain on the first TD-SCDMA transmitted by first RF switch
Row signal carries out radiofrequency signal processing to the first TD-SCDMA uplink signals, to generate the 2nd TD-SCDMA uplink signals,
Then the 2nd TD-SCDMA uplink signals are sent to the second RF switch, so that second RF switch passes through the ends BS
The 2nd TD-SCDMA uplink signals are sent to TD-SCDMA base station by mouth.
In embodiments of the present invention, the upstream radio-frequency module includes the second low-noise amplifier, the second SAW filter
And the second RF power amplification pipe.
Then the S13 is specially：
When the control signal is closing control signal, the switch module of control connection power circuit disconnects, to close
The power supply of the downlink radio frequency module and the upstream radio-frequency module.
In embodiments of the present invention, power circuit gives the upstream radio-frequency module and the downlink radio frequency by switch module
Module for power supply, when circuit self-excitation occurs, the central processing unit controls the switch module and disconnects, and is penetrated with cutting off the uplink
The power supply of frequency module and the downlink radio frequency module, prevents circuit self-excitation from equipment of itself being caused to damage.
Referring to Fig. 3, fourth embodiment of the invention provides a kind of TD-SCDMA signal downlinks Self-excitation Detection system 10, packet
Include power detector 11, downlink radio frequency module 12, the first RF switch 13, central processing unit 14, power circuit 15 and switching molding
Block 16.
The power detector 11, the first TD- transmitted to the first RF switch 13 for obtaining downlink radio frequency module 12
SCDMA downlink signals, and first voltage mould is exported to the central processing unit 14 according to the first TD-SCDMA downlink signals
Quasi- signal.
The central processing unit 14, the first TD-SCDMA for will be obtained according to the first voltage analog signal
The minimum power of downlink signal is compared with predetermined power threshold value, to export control signal to the switch module 16；Work as institute
When to state control signal be closing control signal, the switch module 16 that control connects the power circuit 15 disconnects.
In embodiments of the present invention, actual use the stage, the central processing unit 14 according to reception it is described first electricity
Pressing mold intends the power of the first TD-SCDMA downlink signals described in signal sampling, and the sampling interval is set as T, 37.5 μ s of T ＜, sampling time
For 5ms, the minimum power in the power of the first TD-SCDMA downlink signals of sampling is then obtained.
The switch module 16, for being disconnected according to the closing control signal, to close the downlink radio frequency module 12
Power supply.
Further include modem 17 and the second RF switch 18 in the first realization method of fourth embodiment.
The central processing unit 14, is additionally operable to receive the downlink switching signal of the transmission of the modem 17, and according to
The downlink switching signal switches first RF switch 13 and second RF switch 18, is penetrated with being switched to the downlink
Frequency module 12.
The downlink radio frequency module 12, for obtaining under the 3rd TD-SCDMA transmitted by the second RF switch 18
Row signal carries out radiofrequency signal processing, to generate the first TD-SCDMA downlinks to the 3rd TD-SCDMA downlink signals
The first TD-SCDMA downlink signals are transferred to first RF switch 13 and the power detector 11 by signal.
Further include in second of realization method of fourth embodiment according to the first realization method of fourth embodiment
Upstream radio-frequency module 19.
The central processing unit 14, is additionally operable to receive the uplink switching signal of the transmission of the modem 17, and according to
The uplink switching signal switches first RF switch 13 and second RF switch 18, is penetrated with being switched to the uplink
Frequency module 19.
The upstream radio-frequency module 19, for obtaining the first TD-SCDMA transmitted by first RF switch 13
Row signal carries out radiofrequency signal processing to the first TD-SCDMA uplink signals, to generate the 2nd TD-SCDMA uplink signals,
The 2nd TD-SCDMA uplink signals are sent to the second RF switch 18.
The switch module 16 is specifically used for being disconnected according to the closing control signal, to close the downlink radio frequency mould
The power supply of block 12 and the upstream radio-frequency module 19.
In embodiments of the present invention, referring to Fig. 4, the downlink radio frequency module 12 include the first low-noise amplifier 121,
First SAW filter 122 and the first RF power amplification pipe 123；First low-noise amplifier 121, for amplifying described second
The TD-SCDMA downlink signals of amplification are transferred to the first sound table and filtered by the TD-SCDMA downlink signals that RF switch 18 transmits
Wave device 122；First SAW filter 122 will for the TD-SCDMA downlink signals of the amplification to be filtered
Amplification and filtered TD-SCDMA downlink signals are transferred to the first RF power amplification pipe 123；The first RF power amplification pipe
123, for the amplification and filtered TD-SCDMA downlink signals to be carried out radio-frequency power enhanced processing, with to described first
RF switch 13 transmits the TD-SCDMA downlink signals after radio frequency processing, by first low-noise amplifier 121, the first sound
The inhibition to noise in TD-SCDMA downlink signals is realized in the processing of table filter 122 and the first RF power amplification pipe 123, is eliminated
Interference problem.
In embodiments of the present invention, referring to Fig. 5, the upstream radio-frequency module 19 include the second low-noise amplifier 191,
Second SAW filter 192 and the second RF power amplification pipe 193；Second low-noise amplifier 191, for amplifying described first
The TD-SCDMA uplink signals that RF switch 13 transmits filter the TD-SCDMA uplink signal transmissions of amplification to the rising tone table
Wave device 192；Second SAW filter 192 will for the TD-SCDMA uplink signals of the amplification to be filtered
Amplification and filtered TD-SCDMA uplink signal transmissions give the second RF power amplification pipe 193；The second RF power amplification pipe
193, for the amplification and filtered TD-SCDMA uplink signals to be carried out radio-frequency power enhanced processing, with to described second
RF switch 18 transmits the TD-SCDMA uplink signals after radio frequency processing, by second low-noise amplifier 191, the rising tone
The inhibition to noise in TD-SCDMA uplink signals is realized in the processing of table filter 192 and the second RF power amplification pipe 193, is eliminated
Interference problem.
In embodiments of the present invention, the power circuit 15, for being penetrated for the downlink radio frequency module 12 and the uplink
Frequency module 19 provides power supply.
In embodiments of the present invention, the modem 17 couples TD-SCDMA downlink signals, upper and lower for parsing
Row switching time exports uplink switching signal or downlink switching signal and gives central processing unit 14 (CPU), so that central processing unit
14 (CPU) switch the first RF switch 13 and the second RF switch 18 according to signal makes RF switch so that TD-SCDMA signals
Downlink Self-excitation Detection system is switched to upstream radio-frequency module 19 or downlink radio frequency module 12.
In embodiments of the present invention, first RF switch 13, for receiving the transmission of downlink radio frequency module 12
TD-SCDMA downlink signals and by MS port transmissions to mobile phone；And receive TD-SCDMA uplink of the mobile phone by MS port transmissions
Signal gives the TD-SCDMA uplink signal transmissions to the upstream radio-frequency module 19.
In embodiments of the present invention, second RF switch 18, for receiving the transmission of upstream radio-frequency module 19
TD-SCDMA uplink signals and by BS port transmissions to base station；And receive TD-SCDMA downlink of the base station by BS port transmissions
The TD-SCDMA downlink signals are transferred to the downlink radio frequency module 12 by signal.
In embodiments of the present invention, specifically, the modem 17 couples TD-SCDMA down link signals and solves
Uplink and downlink switching time is analysed, central processing unit 14 (CPU) is outputed signal to, so that central processing unit 14 (CPU) is cut according to signal
Changing the first RF switch 13 and the second RF switch 18 makes RF switch so that TD-SCDMA signal downlink Self-excitation Detection systems are cut
Upstream radio-frequency module 19 or downlink radio frequency module 12 are changed to, the TD-SCDMA downlink signals of TD-SCDMA base station transmitting pass through the ends BS
Mouth enters second RF switch 18, then enters the downlink radio frequency module 12, warp by second RF switch 18
It crosses after the operations such as radiofrequency signal amplification, the frequency-selecting of the downlink radio frequency module 12 into the first RF switch 13, then passes through
The ports MS enter mobile phone terminal, and the power detector 11 couples the letter of the TD-SCDMA downlinks in the downlink radio frequency module 12
Number, after handling the TD-SCDMA downlink signals, the input of 11 output voltage analog signal of the power detector
The central processing unit 14 (CPU), the power circuit 15 give the downlink radio frequency by the power MOS field effect transistor
Module 12 and the upstream radio-frequency module 19 power supply, the central processing unit 14 (CPU) control power MOS field effect transistor are beaten
On or off is closed；The TD-SCDMA uplink signals of mobile phone terminal transmitting enter first RF switch 13 by the ports MS, then
Enter the upstream radio-frequency module 19 by first RF switch 13, by the radiofrequency signal of the upstream radio-frequency module 19
Enter second RF switch 18 after the operations such as amplification, frequency-selecting, then enters base station by the ports BS.
It should be noted that the apparatus embodiments described above are merely exemplary, wherein described be used as separating component
The unit of explanation may or may not be physically separated, and the component shown as unit can be or can also
It is not physical unit, you can be located at a place, or may be distributed over multiple network units.It can be according to actual
It needs that some or all of module therein is selected to achieve the purpose of the solution of this embodiment.In addition, device provided by the invention
In embodiment attached drawing, the connection relation between module indicates there is communication connection between them, specifically can be implemented as one or
A plurality of communication bus or signal wire.Those of ordinary skill in the art are without creative efforts, you can to understand
And implement.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of TD-SCDMA signal downlinks Self-excitation Detection method, which is characterized in that include the following steps：
The first TD-SCDMA downlink signals that downlink radio frequency module is transmitted to the first RF switch are obtained, and according to described first
TD-SCDMA downlink signals export first voltage analog signal；
By the minimum power of the first TD-SCDMA downlink signals obtained according to the first voltage analog signal and preset
Power threshold is compared, to export control signal；
When the control signal is closing control signal, the switch module of control connection power circuit disconnects, described in closing
The power supply of downlink radio frequency module.
2. TD-SCDMA signal downlinks Self-excitation Detection method according to claim 1, which is characterized in that it is described will be according to institute
The minimum power and predetermined power threshold value for stating the first TD-SCDMA downlink signals of first voltage analog signal acquisition carry out
Compare, to export control signal, specifically includes：
The power of the first TD-SCDMA downlink signals is sampled according to the first voltage analog signal of reception；Wherein, it adopts
Sample interval is set as T, T ＜ 37.5 μ s, sampling time 5ms；
Obtain the minimum power in the power of the first TD-SCDMA downlink signals of sampling；
When the difference of the minimum power and predetermined power threshold value is more than 0, closing control signal is exported.
3. TD-SCDMA signal downlinks Self-excitation Detection method according to claim 2, which is characterized in that the predetermined power
The setting of threshold value includes：
Expire lattice Bao'an in signal and fill and debug success, and when ensuring that speech quality is normal：
Obtain the 2nd TD-SCDMA downlink signals that are transmitted to first RF switch of downlink radio frequency module, and according to described the
Two TD-SCDMA downlink signals export second voltage analog signal；
The power of the 2nd TD-SCDMA downlink signals is sampled according to the second voltage analog signal of reception；Wherein, it adopts
Sample interval is set as T, T ＜ 37.5 μ s, sampling time 5ms；
Set the maximum power in the power of the 2nd TD-SCDMA downlink signals of sampling to predetermined power threshold value.
4. TD-SCDMA signal downlinks Self-excitation Detection method according to claim 2, which is characterized in that further include：
The downlink switching signal of receiving modem transmission, and first radio frequency is switched according to the downlink switching signal and is opened
Pass and the second RF switch, to be switched to the downlink radio frequency module；
The 3rd TD-SCDMA downlink signals transmitted by second RF switch are obtained, the downlink radio frequency mould is passed through
Block carries out radiofrequency signal processing to the 3rd TD-SCDMA downlink signals, to generate the first TD-SCDMA downlink signals.
5. TD-SCDMA signal downlinks Self-excitation Detection method according to claim 4, which is characterized in that further include：
The uplink switching signal of the modem transmission is received, and is penetrated according to uplink switching signal switching described first
Frequency switch and second RF switch, to be switched to upstream radio-frequency module；
The first TD-SCDMA uplink signals transmitted by first RF switch are obtained, by upstream radio-frequency module to described
First TD-SCDMA uplink signals carry out radiofrequency signal processing, to generate the 2nd TD-SCDMA uplink signals；
The 2nd TD-SCDMA uplink signals are sent to the second RF switch by the upstream radio-frequency module；
Then described when the control signal is closing control signal, the switch module of control connection power circuit disconnects, to close
The power supply of the downlink radio frequency module is closed, specially：
When the control signal is closing control signal, the switch module of control connection power circuit disconnects, described in closing
The power supply of downlink radio frequency module and the upstream radio-frequency module.
6. the TD-SCDMA signal downlink Self-excitation Detection methods according to claim 1 to 5 any one, which is characterized in that
The switch module is power MOS field effect transistor.
7. TD-SCDMA signal downlinks Self-excitation Detection method according to claim 6, which is characterized in that the power circuit
Including switching power circuit, voltage-stabilized power supply circuit, stabilized current supply circuit, power power-supply circuit, inverter power circuit, DC-DC electricity
Any one in source circuit and protection power source circuit.
8. a kind of TD-SCDMA signal downlinks Self-excitation Detection system, which is characterized in that including power detector, downlink radio frequency mould
Block, the first RF switch, central processing unit, power circuit and switch module；
The power detector, the first TD-SCDMA downlinks letter transmitted to the first RF switch for obtaining downlink radio frequency module
Number, and first voltage analog signal is exported to the central processing unit according to the first TD-SCDMA downlink signals；
The central processing unit, for believing the first TD-SCDMA downlinks obtained according to the first voltage analog signal
Number minimum power be compared with predetermined power threshold value, with to the switch module export control signal；When the control is believed
When number being closing control signal, the switch module that control connects the power circuit disconnects；
The switch module, for being disconnected according to the closing control signal, to close the power supply of the downlink radio frequency module.
9. TD-SCDMA signal downlinks Self-excitation Detection system according to claim 8, which is characterized in that further include modulatedemodulate
Adjust device and the second RF switch；
The central processing unit is additionally operable to receive the downlink switching signal of the modem transmission, and according to the downlink
Switching signal switches first RF switch and second RF switch, to be switched to the downlink radio frequency module；
The downlink radio frequency module, for obtaining the 3rd TD-SCDMA downlinks letter transmitted by second RF switch
Number, radiofrequency signal processing is carried out to the 3rd TD-SCDMA downlink signals, to generate the first TD-SCDMA downlink signals,
The first TD-SCDMA downlink signals are transferred to first RF switch and the power detector.
10. TD-SCDMA signal downlinks Self-excitation Detection system according to claim 9, which is characterized in that further include uplink
Radio-frequency module；
The central processing unit is additionally operable to receive the uplink switching signal of the modem transmission, and according to the uplink
Switching signal switches first RF switch and second RF switch, to be switched to the upstream radio-frequency module；
The upstream radio-frequency module, for obtaining the first TD-SCDMA uplink signals transmitted by first RF switch,
Radiofrequency signal processing is carried out to the first TD-SCDMA uplink signals, it, will be described to generate the 2nd TD-SCDMA uplink signals
2nd TD-SCDMA uplink signals are sent to the second RF switch；
The switch module is specifically used for being disconnected according to the closing control signal, to close the downlink radio frequency module and institute
State the power supply of upstream radio-frequency module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810262031.2A CN108494502A (en) | 2018-03-27 | 2018-03-27 | A kind of TD-SCDMA signal downlinks Self-excitation Detection method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810262031.2A CN108494502A (en) | 2018-03-27 | 2018-03-27 | A kind of TD-SCDMA signal downlinks Self-excitation Detection method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108494502A true CN108494502A (en) | 2018-09-04 |
Family
ID=63316862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810262031.2A Withdrawn CN108494502A (en) | 2018-03-27 | 2018-03-27 | A kind of TD-SCDMA signal downlinks Self-excitation Detection method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108494502A (en) |
-
2018
- 2018-03-27 CN CN201810262031.2A patent/CN108494502A/en not_active Withdrawn
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