CN107659352A - Miniature repeater Self-excitation Detection and the method, apparatus and baseband chip of processing - Google Patents
Miniature repeater Self-excitation Detection and the method, apparatus and baseband chip of processing Download PDFInfo
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- CN107659352A CN107659352A CN201610589934.2A CN201610589934A CN107659352A CN 107659352 A CN107659352 A CN 107659352A CN 201610589934 A CN201610589934 A CN 201610589934A CN 107659352 A CN107659352 A CN 107659352A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15564—Relay station antennae loop interference reduction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The present invention provides a kind of Miniature repeater Self-excitation Detection and the method, apparatus and baseband chip of processing.Methods described includes：When up-downgoing amplification link is in closed mode, carries out searching net, find the cell that can be resident, and down-going synchronous is established be resident cell；The signal to noise ratio of downstream signal in the very first time is measured, is averaged value as benchmark signal to noise ratio snr 0, and according to downstream signal power calculation gain amplifier；When the power output under the gain amplifier is no more than rated power, opens up-downgoing amplification link and carry out signal forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；By the signal to noise ratio snr in real time compared with the benchmark signal to noise ratio snr 0, self-excitation judgement and respective handling are carried out according to comparative result and the descending input power real-time monitored.The present invention can much sooner, accurately carry out Self-excitation Detection and processing.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of Miniature repeater Self-excitation Detection and the side of processing
Method, device and baseband chip.
Background technology
Miniature repeater with its is simple in construction, cost is cheap, be easily installed the advantages that, in the blind area for being much difficult to cover and
Feeble field has a wide range of applications.Repeater belongs to same frequency wireless signal multiplying arrangement, due to isolation between antennas and change in gain
Etc. reason, downstream signal that donor antenna receives from base station is launched after amplifying by repeater by retransmitting antenna, one
Sub-signal can be received by donor antenna and is amplified again again, and self-excitation is caused so as to form a regenerative feedback loop.Self-excitation it
Afterwards the power amplifier of equipment and LNA can rapid saturation, speech quality deteriorates rapidly, and serious conditions can burning apparatus.It is existing
Repeater for the mode one that self-excitation is handled be strengthen engineers and technicians' inspection, second, installation when ensure isolation between antennas foot
It is enough big.
During the present invention is realized, inventor has found following technical problem in the prior art at least be present：Self-excitation
Processing is limited by factors such as geographical conditions, and Self-excitation Detection is inaccurate, and self-excitation is handled not in time.
The content of the invention
Miniature repeater Self-excitation Detection provided by the invention with processing method, apparatus and baseband chip, can more and
When, accurately carry out Self-excitation Detection with processing.
In a first aspect, the present invention provides a kind of Miniature repeater Self-excitation Detection and the method for processing, including：
When up-downgoing amplification link is in closed mode, carries out searching net, find the cell that can be resident, and with being resident
Cell establish down-going synchronous；
The signal to noise ratio of downstream signal in the very first time is measured, is averaged value as benchmark signal to noise ratio snr 0, and under
Row signal power calculates gain amplifier；
When the power output under the gain amplifier is no more than rated power, opens up-downgoing amplification link and carry out letter
Number forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；
By the signal to noise ratio snr in real time compared with the benchmark signal to noise ratio snr 0, according to comparative result and in real time
The descending input power monitored carries out self-excitation judgement and respective handling.
Alternatively, it is described by it is described in real time signal to noise ratio snr with the benchmark signal to noise ratio snr 0 compared with, according to compare tie
Fruit and the descending input power real-time monitored, which carry out self-excitation judgement and respective handling, to be included：
If meet in second time memory in the continuous measurement point of the first quantity | SNR-SNR0 |<Th1, judge miniature
Self-excitation does not occur for repeater；
Open up-downgoing amplification link, and the real-time signal to noise ratio snr of test constantly within the 3rd time, will measure again
Real-time signal to noise ratio snr according to comparative result and real-time monitors descending defeated compared with the benchmark signal to noise ratio snr 0
Enter power and re-start self-excitation judgement and respective handling, wherein, th1 is the first signal-noise ratio threshold value.
Alternatively, it is described by it is described in real time signal to noise ratio snr with the benchmark signal to noise ratio snr 0 compared with, according to compare tie
Fruit and the descending input power real-time monitored, which carry out self-excitation judgement and respective handling, to be included：
If meet SNR0-SNR in the measurement point of the second quantity in second time memory>Th1, and descending input power
Less than predetermined power, judge that slight self-excitation occurs for Miniature repeater, reported to upper strata platform control module, close up-downgoing
Amplify link；
Gain amplifier is recalculated according to downstream signal power, when the power output under the gain amplifier is no more than volume
When determining power, open up-downgoing amplification link and carry out signal forwarding, remeasure the real-time signal to noise ratio snr in the second time, will
The real-time signal to noise ratio snr remeasured is compared with the benchmark signal to noise ratio snr 0, according to comparative result and monitoring in real time
To descending input power re-start self-excitation judgement and respective handling, wherein, th1 is the first signal-noise ratio threshold value.
Alternatively, it is described by it is described in real time signal to noise ratio snr with the benchmark signal to noise ratio snr 0 compared with, according to compare tie
Fruit and the descending input power real-time monitored, which carry out self-excitation judgement and respective handling, to be included：
If meet SNR in the measurement point of the 3rd quantity in second time memory<Th2, and descending input power is more than
Predetermined power, judge that serious self-excitation occurs for Miniature repeater, reported to upper strata platform control module；
Re-start and search net, find the new cell that can be resident, and down-going synchronous is established be resident new cell, survey again
The signal to noise ratio of downstream signal in the very first time is measured, is averaged value as benchmark signal to noise ratio snr 0, and according to downstream signal power
Gain amplifier is recalculated, when the power output under the gain amplifier is no more than rated power, opens up-downgoing amplification
Link carries out signal forwarding, remeasures the real-time signal to noise ratio snr in the second time, the real-time signal to noise ratio snr that will be remeasured
Compared with the benchmark signal to noise ratio snr 0, re-started according to comparative result and the descending input power real-time monitored
Self-excitation judgement and respective handling, wherein, th2 is the second signal-noise ratio threshold value.
Second aspect, the present invention provide a kind of Miniature repeater Self-excitation Detection and the device of processing, including：
Net unit is searched, for when up-downgoing amplification link is in closed mode, carrying out searching net, searching can be resident small
Area, and establish down-going synchronous be resident cell；
First measuring unit, for measuring the signal to noise ratio of downstream signal in the very first time, it is averaged value and believes as benchmark
Make an uproar than SNR0, and according to downstream signal power calculation gain amplifier；
Second measuring unit, for when the power output under the gain amplifier is no more than rated power, in opening
Descending amplification link carries out signal forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；
Judge processing unit, for by it is described in real time signal to noise ratio snr compared with the benchmark signal to noise ratio snr 0, according to
Comparative result and the descending input power real-time monitored carry out self-excitation judgement and respective handling.
Alternatively, the judgement processing unit, for working as the continuous measurement in second time memory in the first quantity
Point meets | SNR-SNR0 |<During th1, judge that self-excitation does not occur for Miniature repeater；
Then second measuring unit, for opening up-downgoing amplification link, and test constantly is real-time within the 3rd time
Signal to noise ratio snr；The judgement processing unit, for again by the real-time signal to noise ratio snr measured and the benchmark signal to noise ratio
SNR0 is compared, and self-excitation judgement and corresponding position are re-started according to comparative result and the descending input power real-time monitored
Reason, wherein, th1 is the first signal-noise ratio threshold value.
Alternatively, the judgement processing unit, expire for working as in second time memory in the measurement point of the second quantity
Sufficient SNR0-SNR>Th1, and when descending input power is less than predetermined power, judge that slight self-excitation occurs for Miniature repeater, to upper strata
Platform control module is reported, and closes up-downgoing amplification link；
Then first measuring unit, for recalculating gain amplifier according to downstream signal power；Second measurement
Unit, carried out for when the power output under the gain amplifier is no more than rated power, opening up-downgoing amplification link
Signal forwards, and remeasures the real-time signal to noise ratio snr in the second time；The judgement processing unit, for that will remeasure
Real-time signal to noise ratio snr according to comparative result and real-time monitors descending defeated compared with the benchmark signal to noise ratio snr 0
Enter power and re-start self-excitation judgement and respective handling, wherein, th1 is the first signal-noise ratio threshold value.
Alternatively, the judgement processing unit, expire for working as in second time memory in the measurement point of the 3rd quantity
Sufficient SNR<Th2, and when descending input power is more than predetermined power, judge that serious self-excitation occurs for Miniature repeater, to upper platform
Control module is reported；
It is described to search net unit, net is searched for re-starting, finds the new cell that can be resident, and build be resident new cell
Vertical down-going synchronous；First measuring unit, for remeasuring the signal to noise ratio of downstream signal in the very first time, is averaged value
Gain amplifier is recalculated as benchmark signal to noise ratio snr 0, and according to downstream signal power；Second measuring unit, for working as
When power output under the gain amplifier is no more than rated power, opens up-downgoing amplification link and carry out signal forwarding, weight
Real-time signal to noise ratio snr in second time of new measurement；The judgement processing unit, for the real-time signal to noise ratio that will be remeasured
SNR is compared with the benchmark signal to noise ratio snr 0, according to comparative result and the descending input power real-time monitored again
Self-excitation judgement and respective handling are carried out, wherein, th2 is the second signal-noise ratio threshold value.
The third aspect, the embodiment of the present invention provide a kind of baseband chip, and the baseband chip includes above-mentioned Miniature repeater
Self-excitation Detection and the device of processing.
Miniature repeater Self-excitation Detection provided in an embodiment of the present invention and the method, apparatus and baseband chip of processing, when upper
Descending amplification link carries out searching net when being in closed mode, finds the cell that can be resident, and be resident cell foundation
Row is synchronous；The signal to noise ratio of downstream signal in the very first time is measured, is averaged value as benchmark signal to noise ratio snr 0, and according to descending
Signal power calculates gain amplifier；When the power output under the gain amplifier is no more than rated power, up-downgoing is opened
Amplify link and carry out signal forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；By the real-time signal to noise ratio snr
Compared with the benchmark signal to noise ratio snr 0, self-excitation is carried out according to comparative result and the descending input power real-time monitored
Judgement and respective handling.Compared with prior art, the present invention can judge whether to occur according to the real-time signal to noise ratio detected
Self-excitation, Self-excitation Detection much sooner and accurately, furthermore it is possible to save extra power-sensing circuit, have saved cost with processing.
Brief description of the drawings
Fig. 1 is the flow chart of Miniature repeater Self-excitation Detection provided in an embodiment of the present invention and the method for processing；
Fig. 2 is Miniature repeater Self-excitation Detection provided in an embodiment of the present invention and the structural representation of the device of processing.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
Only it is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of Miniature repeater Self-excitation Detection and the method for processing, and methods described is applied to base band
Chip, as shown in figure 1, methods described includes：
S11, when up-downgoing amplification link is in closed mode, search net, find the cell that can be resident, and with institute
Resident cell establishes down-going synchronous；
S12, in the measurement very first time downstream signal signal to noise ratio, be averaged value as benchmark signal to noise ratio snr 0, and root
According to downstream signal power calculation gain amplifier；
S13, when the power output under the gain amplifier is no more than rated power, open up-downgoing amplification link enter
Row signal forwards, and the real-time signal to noise ratio snr in the time of test constantly second；
S14, by the signal to noise ratio snr in real time compared with the benchmark signal to noise ratio snr 0, according to comparative result and
The descending input power real-time monitored carries out self-excitation judgement and respective handling.
Miniature repeater Self-excitation Detection provided in an embodiment of the present invention and the method for processing, when up-downgoing amplification link is located
When closed mode, carry out searching net, find the cell that can be resident, and down-going synchronous is established be resident cell；Measurement first
The signal to noise ratio of downstream signal in time, value is averaged as benchmark signal to noise ratio snr 0, and put according to downstream signal power calculation
Large gain；When the power output under the gain amplifier is no more than rated power, opens up-downgoing amplification link and carry out letter
Number forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；By the signal to noise ratio snr in real time and the benchmark noise
It is compared than SNR0, self-excitation judgement and corresponding position is carried out according to comparative result and the descending input power real-time monitored
Reason.Compared with prior art, the present invention according to the real-time signal to noise ratio detected can judge whether that self-excitation, Self-excitation Detection occurs
With handling much sooner and accurately, furthermore it is possible to save extra power-sensing circuit, cost has been saved.
Alternatively, it is described by it is described in real time signal to noise ratio snr with the benchmark signal to noise ratio snr 0 compared with, according to compare tie
Fruit and the descending input power real-time monitored, which carry out self-excitation judgement and respective handling, to be included：
If meet in second time memory in the continuous measurement point of the first quantity | SNR-SNR0 |<Th1, illustrate noise
Than not deteriorating, belong to normal fluctuation, and can stablize within a certain period of time, judge that self-excitation does not occur for Miniature repeater.Then beat
Open up-downgoing amplification link, and the real-time signal to noise ratio snr of test constantly within the 3rd time, the real-time signal to noise ratio that will be measured again
SNR is compared with the benchmark signal to noise ratio snr 0, according to comparative result and the descending input power real-time monitored again
Self-excitation judgement and respective handling are carried out, wherein, th1 is the first signal-noise ratio threshold value.
If meet SNR0-SNR in the measurement point of the second quantity in second time memory>Th1, and descending input power
Less than predetermined power, illustrate signal-to-noise ratio degradation to a certain degree, but input power is not especially big, judges Miniature repeater hair
Raw slight self-excitation, is reported to upper strata platform control module, closes up-downgoing amplification link.Then according to downstream signal power weight
It is new to calculate gain amplifier, when the power output under the gain amplifier is no more than rated power, open up-downgoing amplifier chain
Road carry out signal forwarding, remeasure the real-time signal to noise ratio snr in the second time, by the real-time signal to noise ratio snr remeasured with
The benchmark signal to noise ratio snr 0 is compared, and is re-started certainly according to comparative result and the descending input power real-time monitored
Swash judgement and respective handling, wherein, th1 is the first signal-noise ratio threshold value.
Specifically, a time slip-window, such as 1 second can be counted, N number of SNR measured value can be obtained in this is 1 second,
Elapse over time, this N number of measured value can be ceaselessly updated, as long as have inside this N number of measured value N1 meet SNR0-
SNR>Th1, then judge that slight self-excitation occurs for Miniature repeater.
So as to, when judging that slight self-excitation occurs for Miniature repeater, switch-off power amplifier, and according to received signal strength
Link gain is recalculated with protection equipment.
If meet SNR in the measurement point of the 3rd quantity in second time memory<Th2, and descending input power is more than
Predetermined power, illustrate signal to noise ratio severe exacerbation, input power suddenly increases, and forms the circulation amplification of positive feedback, judges miniature
Serious self-excitation occurs for repeater, is reported to upper strata platform control module.Then re-start and search net, searching can be resident new small
Area, and down-going synchronous is established be resident new cell, the signal to noise ratio of downstream signal in the very first time is remeasured, is averaged
Value is used as benchmark signal to noise ratio snr 0, and recalculates gain amplifier according to downstream signal power, when under the gain amplifier
When power output is no more than rated power, opens up-downgoing amplification link and carry out signal forwarding, remeasure in the second time
Real-time signal to noise ratio snr, by the real-time signal to noise ratio snr remeasured compared with the benchmark signal to noise ratio snr 0, according to comparing
As a result and the descending input power that real-time monitors re-starts self-excitation judgement and respective handling, wherein, th2 is the second noise
Compare threshold value.
Specifically, a time slip-window, such as 1 second can be counted, N number of SNR measured value can be obtained in this is 1 second,
Elapse over time, this N number of measured value can be ceaselessly updated, as long as there are N2 to meet SNR inside this N number of measured value<
Th2, then judge that serious self-excitation occurs for Miniature repeater.
So as to when judging that serious self-excitation occurs for Miniature repeater, re-start and search net synchronously, ensure equipment energy self- recoverage
Forwarding state.
Wherein, when judging that slight self-excitation occurs for Miniature repeater or during serious self-excitation, by testing result to upper platform
Control module is reported, and upper platform control module lights corresponding indicator lamp, accordingly to prompt or carry to patrol officer
Installation personnel of waking up corrects isolation between antennas.
In the above-described embodiments, th1, th2, Pth are empirical value, can be obtained by experiment test, can also be according to reality
The Self-excitation Detection sensitivity requirement on border is adjusted, generally, th1=10db, th2=-10db, Pth=-45dbm.
The embodiment of the present invention also provides a kind of Miniature repeater Self-excitation Detection and the device of processing, as shown in Fig. 2 the dress
Put including：
Net unit 11 is searched, for when up-downgoing amplification link is in closed mode, carrying out searching net, finding what can be resident
Cell, and establish down-going synchronous be resident cell；
First measuring unit 12, for measuring the signal to noise ratio of downstream signal in the very first time, value is averaged as benchmark
Signal to noise ratio snr 0, and according to downstream signal power calculation gain amplifier；
Second measuring unit 13, for when the power output under the gain amplifier is no more than rated power, opening
Up-downgoing amplification link carries out signal forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；
Judge processing unit 14, for by it is described in real time signal to noise ratio snr compared with the benchmark signal to noise ratio snr 0, root
Self-excitation judgement and respective handling are carried out according to comparative result and the descending input power real-time monitored.
Alternatively, the judgement processing unit 14, for working as the continuous survey in second time memory in the first quantity
Amount point meets | SNR-SNR0 |<During th1, judge that self-excitation does not occur for Miniature repeater；
Then second measuring unit 13, for opening up-downgoing amplification link, and test constantly is real within the 3rd time
When signal to noise ratio snr；The judgement processing unit 14, for again by the real-time signal to noise ratio snr measured and the benchmark noise
It is compared than SNR0, re-starting self-excitation according to comparative result and the descending input power real-time monitored judges and corresponding
Processing, wherein, th1 is the first signal-noise ratio threshold value.
Alternatively, the judgement processing unit 14, for working as the measurement point in second time memory in the second quantity
Meet SNR0-SNR>Th1, and when descending input power is less than predetermined power, judge that slight self-excitation occurs for Miniature repeater, upwards
Layer platform control module is reported, and closes up-downgoing amplification link；
Then first measuring unit 12, for recalculating gain amplifier according to downstream signal power；Described second surveys
Unit 13 is measured, for when the power output under the gain amplifier is no more than rated power, opening up-downgoing amplification link
Signal forwarding is carried out, remeasures the real-time signal to noise ratio snr in the second time；The judgement processing unit 14, for will again
The real-time signal to noise ratio snr of measurement according to comparative result and is real-time monitored compared with the benchmark signal to noise ratio snr 0
Descending input power re-starts self-excitation judgement and respective handling, wherein, th1 is the first signal-noise ratio threshold value.
Alternatively, the judgement processing unit 14, for working as the measurement point in second time memory in the 3rd quantity
Meet SNR<Th2, and when descending input power is more than predetermined power, judges that serious self-excitation occurs for Miniature repeater, put down to upper strata
Platform control module is reported；
It is described to search net unit 11, search net for re-starting, find the new cell that can be resident, and be resident new cell
Establish down-going synchronous；First measuring unit 12, for remeasuring the signal to noise ratio of downstream signal in the very first time, is put down
Average recalculates gain amplifier as benchmark signal to noise ratio snr 0, and according to downstream signal power；Second measuring unit 13,
Signal turn is carried out for when the power output under the gain amplifier is no more than rated power, opening up-downgoing amplification link
Hair, remeasures the real-time signal to noise ratio snr in the second time；The judgement processing unit 14, for real-time by what is remeasured
Signal to noise ratio snr is compared with the benchmark signal to noise ratio snr 0, according to comparative result and the descending input work real-time monitored
Rate re-starts self-excitation judgement and respective handling, wherein, th2 is the second signal-noise ratio threshold value.
Miniature repeater Self-excitation Detection provided in an embodiment of the present invention and the device of processing, when up-downgoing amplification link is located
When closed mode, carry out searching net, find the cell that can be resident, and down-going synchronous is established be resident cell；Measurement first
The signal to noise ratio of downstream signal in time, value is averaged as benchmark signal to noise ratio snr 0, and put according to downstream signal power calculation
Large gain；When the power output under the gain amplifier is no more than rated power, opens up-downgoing amplification link and carry out letter
Number forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；By the signal to noise ratio snr in real time and the benchmark noise
It is compared than SNR0, self-excitation judgement and corresponding position is carried out according to comparative result and the descending input power real-time monitored
Reason.Compared with prior art, the present invention according to the real-time signal to noise ratio detected can judge whether that self-excitation, Self-excitation Detection occurs
With handling much sooner and accurately, furthermore it is possible to save extra power-sensing circuit, cost has been saved.
The embodiment of the present invention also provides a kind of baseband chip, and the baseband chip includes above-mentioned Miniature repeater Self-excitation Detection
With the device of processing.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with
The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (9)
1. a kind of Miniature repeater Self-excitation Detection and the method for processing, it is characterised in that including：
When up-downgoing amplification link is in closed mode, search net, find the cell that can be resident, and with it is be resident small
Area establishes down-going synchronous；
The signal to noise ratio of downstream signal in the very first time is measured, is averaged value as benchmark signal to noise ratio snr 0, and according to descending letter
Number power calculation gain amplifier；
When the power output under the gain amplifier is no more than rated power, opens up-downgoing amplification link and carry out signal turn
Hair, and the real-time signal to noise ratio snr in the time of test constantly second；
By the signal to noise ratio snr in real time compared with the benchmark signal to noise ratio snr 0, according to comparative result and monitoring in real time
The descending input power arrived carries out self-excitation judgement and respective handling.
2. according to the method for claim 1, it is characterised in that described to believe the signal to noise ratio snr in real time with the benchmark
Make an uproar and be compared than SNR0, self-excitation judgement and corresponding position are carried out according to comparative result and the descending input power real-time monitored
Reason includes：
If meet in second time memory in the continuous measurement point of the first quantity | SNR-SNR0 |<Th1, judgement is miniature directly to put
Stand and self-excitation does not occur；
Up-downgoing amplification link, and the real-time signal to noise ratio snr of test constantly within the 3rd time are opened, it is again real-time by what is measured
Signal to noise ratio snr is compared with the benchmark signal to noise ratio snr 0, according to comparative result and the descending input work real-time monitored
Rate re-starts self-excitation judgement and respective handling, wherein, th1 is the first signal-noise ratio threshold value.
3. according to the method for claim 1, it is characterised in that described to believe the signal to noise ratio snr in real time with the benchmark
Make an uproar and be compared than SNR0, self-excitation judgement and corresponding position are carried out according to comparative result and the descending input power real-time monitored
Reason includes：
If meet SNR0-SNR in the measurement point of the second quantity in second time memory>Th1, and descending input power is less than
Predetermined power, judge that slight self-excitation occurs for Miniature repeater, reported to upper strata platform control module, close up-downgoing amplification
Link；
Gain amplifier is recalculated according to downstream signal power, when the power output under the gain amplifier is no more than specified work(
During rate, open up-downgoing amplification link and carry out signal forwarding, remeasure the real-time signal to noise ratio snr in the second time, will again
The real-time signal to noise ratio snr of measurement according to comparative result and is real-time monitored compared with the benchmark signal to noise ratio snr 0
Descending input power re-starts self-excitation judgement and respective handling, wherein, th1 is the first signal-noise ratio threshold value.
4. according to the method for claim 1, it is characterised in that described to believe the signal to noise ratio snr in real time with the benchmark
Make an uproar and be compared than SNR0, self-excitation judgement and corresponding position are carried out according to comparative result and the descending input power real-time monitored
Reason includes：
If meet SNR in the measurement point of the 3rd quantity in second time memory<Th2, and descending input power is more than default
Power, judge that serious self-excitation occurs for Miniature repeater, reported to upper strata platform control module；
Re-start and search net, find the new cell that can be resident, and down-going synchronous is established be resident new cell, remeasure the
The signal to noise ratio of downstream signal in one time, value is averaged as benchmark signal to noise ratio snr 0, and according to downstream signal power again
Gain amplifier is calculated, when the power output under the gain amplifier is no more than rated power, opens up-downgoing amplification link
Signal forwarding is carried out, the real-time signal to noise ratio snr in the second time is remeasured, by the real-time signal to noise ratio snr remeasured and institute
State benchmark signal to noise ratio snr 0 to be compared, self-excitation is re-started according to comparative result and the descending input power real-time monitored
Judgement and respective handling, wherein, th2 is the second signal-noise ratio threshold value.
5. a kind of Miniature repeater Self-excitation Detection and the device of processing, it is characterised in that including：
Net unit is searched, for when up-downgoing amplification link is in closed mode, carrying out searching net, finding the cell that can be resident,
And establish down-going synchronous be resident cell；
First measuring unit, for measuring the signal to noise ratio of downstream signal in the very first time, value is averaged as benchmark signal to noise ratio
SNR0, and according to downstream signal power calculation gain amplifier；
Second measuring unit, for when the power output under the gain amplifier is no more than rated power, opening up-downgoing
Amplify link and carry out signal forwarding, and the real-time signal to noise ratio snr in the time of test constantly second；
Processing unit is judged, for signal to noise ratio snr to be compared with the benchmark signal to noise ratio snr 0 by described in real time, according to comparing
As a result and the descending input power that real-time monitors carries out self-excitation judgement and respective handling.
6. device according to claim 5, it is characterised in that the judgement processing unit, for when described second
The interior continuous measurement point that the first quantity be present meets | SNR-SNR0 |<During th1, judge that self-excitation does not occur for Miniature repeater；
Then second measuring unit, for opening up-downgoing amplification link, and the real-time noise of test constantly within the 3rd time
Compare SNR；The judgement processing unit, for again entering the real-time signal to noise ratio snr measured and the benchmark signal to noise ratio snr 0
Row compares, and self-excitation judgement and respective handling are re-started according to comparative result and the descending input power real-time monitored, its
In, th1 is the first signal-noise ratio threshold value.
7. device according to claim 5, it is characterised in that the judgement processing unit, for when described second
The interior measurement point that the second quantity be present meets SNR0-SNR>Th1, and when descending input power is less than predetermined power, judge micro-
Slight self-excitation occurs for type repeater, is reported to upper strata platform control module, closes up-downgoing amplification link；
Then first measuring unit, for recalculating gain amplifier according to downstream signal power；Second measuring unit,
Signal turn is carried out for when the power output under the gain amplifier is no more than rated power, opening up-downgoing amplification link
Hair, remeasures the real-time signal to noise ratio snr in the second time；The judgement processing unit, for the real-time letter that will be remeasured
Make an uproar than SNR compared with the benchmark signal to noise ratio snr 0, according to comparative result and the descending input power real-time monitored
Self-excitation judgement and respective handling are re-started, wherein, th1 is the first signal-noise ratio threshold value.
8. device according to claim 5, it is characterised in that the judgement processing unit, for when described second
The interior measurement point that the 3rd quantity be present meets SNR<Th2, and when descending input power is more than predetermined power, judge miniature directly to put
Stand and serious self-excitation occurs, reported to upper strata platform control module；
It is described to search net unit, search net for re-starting, find the new cell that can be resident, and be resident new cell foundation
Row is synchronous；First measuring unit, for remeasuring the signal to noise ratio of downstream signal in the very first time, it is averaged value conduct
Benchmark signal to noise ratio snr 0, and gain amplifier is recalculated according to downstream signal power；Second measuring unit, for when in institute
When stating the power output under gain amplifier and being no more than rated power, open up-downgoing amplification link and carry out signal forwarding, survey again
Real-time signal to noise ratio snr in the time of flow control two；The judgement processing unit, for by the real-time signal to noise ratio snr remeasured with
The benchmark signal to noise ratio snr 0 is compared, and is re-started certainly according to comparative result and the descending input power real-time monitored
Swash judgement and respective handling, wherein, th2 is the second signal-noise ratio threshold value.
9. a kind of baseband chip, it is characterised in that the baseband chip includes micro- as any one of claim 5 to 8
Type straight-forward station self-excitation detects the device with processing.
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