CN103813438B - A kind of slotted synchronous method, equipment and base station - Google Patents
A kind of slotted synchronous method, equipment and base station Download PDFInfo
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- CN103813438B CN103813438B CN201410060752.7A CN201410060752A CN103813438B CN 103813438 B CN103813438 B CN 103813438B CN 201410060752 A CN201410060752 A CN 201410060752A CN 103813438 B CN103813438 B CN 103813438B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a kind of method of slot synchronization, equipment and base station, this method to include：Failing edge detector obtains downgoing baseband signal, detects the failing edge of the envelope of the downgoing baseband signal, and testing result is sent to synchro indicator, synchro indicator exports synchronous indicating signal and/or slot synchronization pulse according to testing result.In the technical solution of the embodiment of the present invention, it is detected by the failing edge of the envelope to downgoing baseband signal, and then determine the boundary of time slot, obtain synchronous indicating signal and/or slot synchronization pulse, namely slot synchronization is realized, it not only realizes simply, but also reliability and stability are higher, and then realized according to synchronous indicating signal and/or slot synchronization pulse and save power consumption, reduced low noise, assist realizing the functions such as interference cancellation ICS and statistics telephone traffic, greatly improve the comprehensive performance of base station.
Description
Technical field
The present invention relates to a kind of wireless communication technique more particularly to slotted synchronous method, equipment and base stations.
Background technology
In global system for mobile communications（Global System for Mobile communication, GSM）In base station,
If the slot sync signal in GSM can be obtained, can be used for realizing many functions, so that the comprehensive performance of base station is big
Width promoted, these functions include shutdown free timeslot with save power consumption, reduce bottom make an uproar, assist realization interference cancellation system
（Interference Cancellation, ICS）And statistics telephone traffic etc..
Existing slotted synchronous method is mainly according to GSM special signals（Such as frequency correction channel（Frequency
Correction Channel, FCCH）Signal or signaling channel（Signaling Channel, SCH）Signal）To obtain time slot
Synchronous, this method is realized complex although synchronization accuracy is higher.In the network optimizations such as base station edge device, consider
The system requirements of low cost causes the demodulation, the analytic ability that lack base band data information, so it is difficult to realize slot synchronization, into
And the comprehensive performance of base station can not be substantially improved.
Invention content
In view of this, an embodiment of the present invention provides a kind of slotted synchronous method, equipment and base station, to solve existing skill
In art base station caused by being difficult to obtain slot sync signal can not lifting system performance the problem of.
The embodiment of the present invention provides a kind of method of slot synchronization, equipment and base station, specific as follows：
A kind of method of slot synchronization, the method includes：
Failing edge detector obtains downgoing baseband signal, detects the failing edge of the envelope of the downgoing baseband signal, and will
Testing result is sent to synchro indicator, and the downgoing baseband signal is by being obtained after handling descending time slot burst
's；
Synchro indicator exports synchronous indicating signal and/or slot synchronization pulse according to testing result.
A kind of slot synchronization equipment, the slot synchronization equipment include：Failing edge detector and synchro indicator；
The failing edge detector, for obtaining downgoing baseband signal, under the envelope for detecting the downgoing baseband signal
Edge is dropped, and testing result is sent to synchro indicator, the downgoing baseband signal is by being carried out to descending time slot burst
It is obtained after processing；
Synchro indicator, for exporting synchronous indicating signal and/or slot synchronization pulse according to testing result.
A kind of base station, the base station include above-mentioned slot synchronization equipment.
In the technical solution of the embodiment of the present invention, it is detected by the failing edge of the envelope to downgoing baseband signal,
And then determine the boundary of time slot, synchronous indicating signal and/or slot synchronization pulse are obtained, namely realize slot synchronization, not only
It realizes simply, and reliability and stability are higher, and then is realized and saved according to synchronous indicating signal and/or slot synchronization pulse
Power consumption reduces low noise, auxiliary realizes ICS and counts the functions such as telephone traffic, greatly improves the comprehensive performance of base station.
Description of the drawings
Fig. 1 is a kind of flow chart of the method for slot synchronization in the embodiment of the present invention one；
Fig. 2 is a kind of flow chart of the method for slot synchronization in the embodiment of the present invention one；
Fig. 3 is a kind of flow chart of the method for slot synchronization in the embodiment of the present invention one；
Fig. 4 is that the state in the embodiment of the present invention one shifts schematic diagram；
Fig. 5 is the structural schematic diagram of the equipment for realizing slotted synchronous method in the embodiment of the present invention two；
Fig. 6 is the timing diagram of the slot synchronization pulse of the failing edge detection and output in the embodiment of the present invention two；
Fig. 7 is the structural schematic diagram of the slot synchronization equipment in the embodiment of the present invention three.
Specific implementation mode
It can not lifting system performance caused by being difficult to obtain slot sync signal in order to solve base station in the prior art
The problem of, a kind of slotted synchronous method of offer of the embodiment of the present invention, equipment and base station.
With reference to the accompanying drawings of the specification, the embodiment of the present invention is described in detail.
Embodiment one
The embodiment of the present invention one provides a kind of method of slot synchronization, and flow chart is as shown in Figure 1, specifically include following step
Suddenly：
Step 100：Failing edge detector obtains downgoing baseband signal, detects the decline of the envelope of the downgoing baseband signal
Edge, and testing result is sent to synchro indicator.
The downgoing baseband signal after handling descending time slot burst by obtaining；
Preferably, the failing edge detector includes：Envelope amplitude computing unit and failing edge detection unit, failing edge inspection
Survey the failing edge that implement body detects the envelope of the downgoing baseband signal by step 201 as shown in Figure 2 to step 203：
Step 201：Envelope amplitude computing unit calculates the envelope amplitude wink of each sampling point moment of downgoing baseband signal
Duration is simultaneously exported to failing edge detection unit；
Step 202：Envelope amplitude instantaneous value and the sampling point moment of the failing edge detection unit to each sampling point moment
The envelope amplitude instantaneous value of all sampling point moments within the 6th setting value time before carries out average calculating operation, obtains this and adopts
The envelope amplitude average value at sampling point moment；
The value range of 6th setting value is to be less than or equal to 540us more than 1.Preferably, the 6th setting value takes
32us。
Step 203：Envelope amplitude average value and the first and sampling point moment of the failing edge detection unit in sampling point moment
When the ratio between envelope amplitude average value of sampling point moment of 7th setting value time is less than eight setting values, downlink is confirmly detected
The failing edge of the envelope of baseband signal.
The value range of 7th setting value is to be less than or equal to 540us more than 0.
It is to be less than 1 more than 0 that 8th setting value, which obtains value range,.Preferably, the 8th setting value takesConversion
It is -3dB for dB digits, probability of miscarriage of justice can be reduced at this time.
Step 110：Synchro indicator exports synchronous indicating signal and/or slot synchronization pulse according to testing result.
Preferably, the synchro indicator includes synchronous state machine unit, and above-mentioned steps 110 specifically include as shown in Figure 3
Step 301 to step 302：
Step 301：Synchronous state machine unit adjusts the synchronous regime of itself according to testing result；
Preferably, the synchronous regime includes search condition, trapped state and tracking mode；Wherein, in system boot
In search condition；Synchronous state machine adjusts the synchronous regime of itself and specifically includes down according to testing result in the step 301
State 1）,2）With 3）：
1）Under search condition, if failing edge detector detects the failing edge of the envelope of downgoing baseband signal, synchronize
State machine unit, which adjusts, itself enters trapped state, otherwise keeps search condition；
2）Under trapped state, if failing edge detector continuous first setting value time detects the envelope of downgoing baseband signal
Failing edge, then synchronous state machine unit, which adjusts, itself enters tracking mode, otherwise, enters search condition, described first
Setting value is the positive integer more than 1；
3）Under tracking mode, if the packet of downgoing baseband signal is not detected in failing edge detector continuous second setting value time
The failing edge of network, then synchronous state machine unit, which adjusts, itself enters search condition, otherwise, continues to keep tracking mode, described
Second setting value is the positive integer more than 1.
Above-mentioned 3）In otherwise when the case where include two kinds：1. detecting failing edge；2. be continuous 1 to（Second setting value -1）
It is secondary that failing edge is not detected.
If first setting value and the second setting value value are smaller, probability of miscarriage of justice can be increased, it, can if value is larger
Make consuming longer time to realize that slot synchronization namely slot synchronization are slower, preferably, first setting value takes 3, described
Second setting value takes 4, can preferably ensure that the probability of wrong diagnosis is smaller at this time and realize that the duration of slot synchronization is relatively short.
Above-mentioned 1）,2）With 3）Also it is the state migration procedure of synchronous state machine unit, which is retouched with state transition diagram
It states as shown in Fig. 4.
Preferably, the synchro indicator further includes detection window unit, slot cycle counter, continuous detection counter
With window width counter；
Wherein, the detection window of detection window unit has opening and closing two states, and under search condition, detection
The detection window of windows units is kept open；
Slot cycle counter and window width counter carry out cycle subtraction count under the action of counting clock；
Continuous detection counter is subtraction count device；
The method further includes two steps of the following first step and second step：
The first step：Failing edge detector is when detecting the failing edge of envelope of the downgoing baseband signal, to detection window
Mouth unit sends failing edge marker pulse；
Second step：Detection window unit sends out the failing edge marker pulse received when the detection window of itself is opened
It is sent to slot cycle counter and synchronous state machine unit；
When count value reduces to 0 or receives failing edge marker pulse, resetting count value is the slot cycle counter
Initial value；The initial value is the length of a time slot, i.e. 577us；
At this point, 1) above-mentioned specifically include：Under search condition：
If synchronous state machine unit receives the failing edge marker pulse from detection window unit, adjusts itself and enter
To trapped state, and indicate that detection window unit closes detection window, and the meter of itself is arranged in the continuous detection counter of instruction
Numerical value is the first setting value, otherwise keeps search condition；
Above-mentioned 2）It specifically includes：Under trapped state：
For slot cycle counter when the count value of itself reduces to third setting value, instruction detection window unit opens detection
Window and window width counter carry out subtraction count from the 4th setting value, and the 4th setting value is window width counter
Initial value, and be twice of third setting value；
The value range of the third setting value is greater than 1 and preferably takes 3us less than 540us.
If synchronous state machine unit is received before the count value of window width counter reduces to 0 from detection window list
Member failing edge marker pulse, it indicates that detection window unit close detection window, and indicate continuous detection counter by itself
Count value subtract 1, otherwise return to search；
Synchronous state machine unit adjusts itself and enters tracking mode, refer to when the count value of continuous detection counter reduces to 0
It is the second setting value to show that the count value of itself is arranged in continuous detection counter；
Above-mentioned 3）It specifically includes：Under tracking mode：
For slot cycle counter when the count value of itself reduces to third setting value, instruction detection window unit opens detection
Window and window width counter carry out subtraction count from the 4th setting value；
Synchronous state machine unit is received before the count value of window width counter reduces to 0 from detection window unit
Failing edge marker pulse when, then close detection window, and indicate that the count value of itself is reset to by continuous detection counter
Otherwise two setting values indicate that the count value of itself is subtracted 1 by continuous detection counter, and indicate detection window unit in window width
When the count value of counter reduces to 0, detection window is closed；
If the count value of continuous detection counter reduces to 0, synchronous state machine unit adjusts itself and enters search condition.
Since time slot has certain length, the duration of the failing edge of the envelope of time slot signal is also in certain time
Within length, when determining the failing edge for the envelope for having obtained time slot signal, you can close detection in certain period of time
Windows units, and then system noise or the interference of other signals are avoided, improve the accuracy of slot synchronization, that is to say, that above-mentioned inspection
The use for surveying windows units, can be improved the accuracy of slot synchronization.
Step 302：Synchronous state machine unit exports synchronous indicating signal according to the synchronous regime after adjustment and/or time slot is same
Pace pulse.
Preferably, above-mentioned steps 302 specifically include：
Synchronous state machine unit is when itself enters tracking mode, set synchronous indicating signal, set synchronizing indication letter
Number expression has been achieved with slot synchronization；
Synchronous state machine unit resets synchronous indicating signal, reset synchronizing indication letter when itself exits tracking mode
Number indicate step-out；
Synchronous state machine unit when itself is in tracking mode, if window width counter count value reduce to 0 it
Before receive the failing edge marker pulse from detection window unit, then postpone the 5th setting value time output time solt synchronize arteries and veins
Otherwise punching when the count value of slot cycle counter reduces to 0, postpones the 5th setting value time output time solt lock-out pulse.
5th setting value can be according to subsequently being determined using the actual needs of the slot synchronization pulse.
Subsequently to the processing of the time slot signal of reception can according to above-mentioned synchronous indicating signal and/or slot synchronization pulse into
Row, it is generally the case that the two signals can be used to know whether to realize slot synchronization, but obtain synchronous indicating signal and
When slot synchronization pulse, merely with synchronization time slot pulse of the synchronous indicating signal in set, and then ensure subsequently to reception
The more accurate processing of time slot signal.
Embodiment two
Second embodiment of the present invention provides a kind of slotted synchronous method, the scheme of the embodiment of the present invention two is of the invention real
Apply the preferred embodiment on the basis of example one, for realizing the equipment of the slotted synchronous method structural schematic diagram as shown in figure 5, figure
5 include：Envelope amplitude computing unit 501, failing edge detection unit 502, synchronous state machine unit 503, detection window unit
504 and slot cycle counter 505, the slotted synchronous method it is specific as follows：
The first step：The sample value (I, Q) of the sampling point moment of downgoing baseband signal is obtained from digital down converter output end
It is sent to envelope amplitude computing unit 501.
Second step：In envelope amplitude computing unit 501, the envelope amplitude instantaneous value of sampled point is according to formulaIt is calculated, the envelope amplitude instantaneous value being calculated is sent to failing edge detection unit 502.
Third walks：In failing edge detection unit 502, the time of 32 μ s is first carried out to the envelope amplitude instantaneous value of sampled point
It is average, algorithm be the sum of instantaneous amplitude in 32 μ s is calculated by barrel shift mode, then divided by number of samples, thus obtain each
The envelope amplitude average value of 32 μ s before the sampling point moment.Then it is A1 to take the envelope amplitude average value at current sample moment（dB）, then
The flat envelope amplitude average value at X μ s sampling point moment is A2 before taking（dB）, calculating difference A2-A1, if A2-A1 >=3 (dB), judges
Failing edge arrives, while by failing edge marker pulse and being sent to detection window unit 504.
The barrel shift mode calculates, and refers to by the sampling point summation in 32us forward this moment；When next sampling point reaches
When, the result that upper one is summed adds the sample value, then subtracts time earliest sample value.
4th step：If detection window is open, failing edge marker pulse is sent to time slot across detection window unit 504
Cycle rate counter 505 and synchronous state machine unit 503, and when detection window opens and closes then by slot cycle counter
505 and synchronous state machine unit 503 control.
Slot cycle counter 505 is a cycle subtraction count device, and the counting period is 577 μ s, in counting clock
Cycle subtraction count is carried out under effect.If receiving the failing edge marker pulse from detection window unit 504, or counter is reduced to
When 0, then slot cycle counter 505 is reset, i.e., the counting initial value of 577 μ s is placed in counter, restarts subtraction count.
There are three states for the tool of synchronous state machine unit 503：Search condition, trapped state and tracking mode.Original state is
Search condition, specific transfer process are as follows：
Under search condition, detection window unit 504 is normally opened；If synchronous state machine unit 503 is received from detection window
The failing edge marker pulse of unit 504 then enters trapped state, simultaneously closes off detection window, and continuous detection counter is arranged
(being a subtraction count device, do not marked in figure) is 3；Otherwise it continues search for.
Under trapped state, detection window is opened when time slot cycle rate counter 505 reduces to 3 μ s, while starting the window of 6 μ s
Mouth width counter (being a subtraction count device, do not marked in figure)；Come if being received before window width counter reduces to 0
The failing edge marker pulse of self-test windows units 504 then closes detection window, and subtracts 1 by continuous detection counter；Otherwise it returns
Return search condition.If continuous detection counter reduces to 0, enter tracking mode, synchronous mark is set, and continuous detection is set
Counter is 4.
Under tracking mode, detection window is opened when time slot cycle rate counter 505 reduces to 3 μ s, while starting the window of 6 μ s
Mouth width counter；If receiving the failing edge marker pulse from detection window before window width counter reduces to 0, close
Detection window is closed, it is 4 to reset continuous detection counter, and postpones Y μ s and provide slot synchronization pulse；Otherwise counting will continuously be detected
Device subtracts 1, and postpones Y μ s when slot cycle counter 505 reduces to 0 and provide slot synchronization pulse, subtracts in window width counter
Detection window is closed when to 0；If continuous detection counter reduces to 0, return to search resets synchronous mark.
The sequential relationship of the slot synchronization pulse of the detection of above-mentioned failing edge and output is as shown in fig. 6, wherein each sampling point
Envelope amplitude instantaneous value constitutes instantaneous envelope, and the envelope amplitude average value of each sampling point constitutes average envelope.
Embodiment three
Based on the same inventive concept with the embodiment of the present invention one and embodiment two, when the embodiment of the present invention three provides a kind of
Gap synchronizer, structural schematic diagram is as shown in fig. 7, the slot synchronization equipment includes：Failing edge detector 700 with synchronize refer to
Show device 710；
The failing edge detector 700 detects the envelope of the downgoing baseband signal for obtaining downgoing baseband signal
Failing edge, and testing result is sent to synchro indicator, the downgoing baseband signal be by descending time slot burst into
It is obtained after row processing；
Synchro indicator 710, for exporting synchronous indicating signal and/or slot synchronization pulse according to testing result.
Preferably, the synchro indicator includes synchronous state machine unit 711；
The synchronous state machine unit 711, for adjusting the synchronous regime of itself according to testing result, and according to adjustment after
Synchronous regime output synchronous indicating signal and/or slot synchronization pulse.
Preferably, the synchronous regime includes search condition, trapped state and tracking mode；Wherein, in system boot
In search condition；
The synchronous state machine unit 711 is specifically used under search condition, if failing edge detector 700 detects down
The failing edge of the envelope of row baseband signal then adjusts and itself enters trapped state, otherwise keeps search condition；In trapped state
Under, if failing edge detector continuous first setting value time detects the failing edge of the envelope of downgoing baseband signal, adjust itself
Tracking mode is entered, otherwise, enters search condition；Under tracking mode, if continuous second setting value of failing edge detector
The failing edge of the secondary envelope that downgoing baseband signal is not detected, then adjust and itself enter search condition, otherwise, continue keep with
Track state, first setting value are the positive integer more than 1；Second setting value is the positive integer more than 1.
Preferably, the synchro indicator 710 further include detection window unit 712, it is slot cycle counter 713, continuous
Detection counter 714 and window width counter 715；
The failing edge detector 700 is additionally operable to when detecting the failing edge of envelope of the downgoing baseband signal, to
Detection window unit sends failing edge marker pulse；
The detection window unit 712, for the control according to slot cycle counter 713 and synchronous state machine unit 711
System, opens or closes the detection window of itself, and when the detection window of itself is opened, the failing edge marker pulse received is sent out
It is sent to slot cycle counter 713 and synchronous state machine unit 711；
The window width counter 715, for carrying out cycle subtraction count under the action of counting clock, according to time slot
The control of cycle rate counter starts subtraction count；
The slot cycle counter 713, for carrying out cycle subtraction count under the action of counting clock, in count value
When reducing to 0 or receiving failing edge marker pulse, resetting count value is initial value, and under trapped state and tracking mode
Under, when the count value of itself reduces to third setting value, instruction detection window unit opens detection window and window width meter
Number device carries out subtraction count from the 4th setting value, and the 4th setting value is the initial value of window width counter, and is third
Twice of setting value；
The continuous detection counter 714, for carrying out subtraction count under the control of synchronous state machine unit；
The synchronous state machine unit 711 is specifically used under search condition, and instruction detection window unit keeps itself
Detection window is in the open state, if receiving the failing edge marker pulse from detection window unit, adjusts itself and enters
To trapped state, and indicate that detection window unit closes detection window, and the meter of itself is arranged in the continuous detection counter of instruction
Numerical value is the first setting value, otherwise keeps search condition；Under trapped state, if the count value in window width counter is reduced to
The failing edge marker pulse from detection window unit is received before 0, it indicates that detection window unit closes detection window, and
Indicate that the count value of itself is subtracted 1 by continuous detection counter, otherwise return to search, in the count value of continuous detection counter
It when reducing to 0, adjusts itself and enters tracking mode, it is the second setting value to indicate that the count value of itself is arranged in continuous detection counter；
Under tracking mode, the failing edge from detection window unit is received before the count value of window width counter reduces to 0
When marker pulse, then detection window is closed, and indicates that the count value of itself is reset to the second setting value by continuous detection counter,
Otherwise it indicates that the count value of itself is subtracted 1 by continuous detection counter, and indicates detection window unit in window width counter
When count value reduces to 0, detection window is closed, when the count value of continuous detection counter reduces to 0, adjusts and itself enters search shape
State.
Preferably, the synchronous state machine unit 711 is specifically used for when itself enters tracking mode, and set, which synchronizes, to be referred to
Show signal；When itself exits tracking mode, synchronous indicating signal is resetted；When itself is in tracking mode, if wide in window
The count value of degree counter receives the failing edge marker pulse from detection window unit before reducing to 0, then postpones the 5th and set
Otherwise definite value time output time solt lock-out pulse when the count value of slot cycle counter reduces to 0, postpones the 5th setting value
Time output time solt lock-out pulse.
Preferably, the failing edge detector 700 includes：Envelope amplitude computing unit 701 and failing edge detection unit
702；
The envelope amplitude computing unit 701, the envelope width of each sampling point moment for calculating downgoing baseband signal
It spends instantaneous value and exports to failing edge detection unit 702；
The failing edge detection unit 702, for the envelope amplitude instantaneous value and the sampled point to each sampling point moment
The envelope amplitude instantaneous value of all sampling point moments before moment within the 6th setting value time carries out average calculating operation, obtains
The envelope amplitude average value of the sampling point moment；Sampling point moment envelope amplitude average value with first with the sampling point moment the
When the ratio between envelope amplitude average value of sampling point moment of seven setting value times is less than eight setting values, downlink base is confirmly detected
The failing edge of the envelope of band signal.
Example IV
Based on the same inventive concept with the embodiment of the present invention one, embodiment two and embodiment three, the embodiment of the present invention four
A kind of base station is provided, the base station includes any slot synchronization equipment in embodiment three.
In the technical solution of the embodiment of the present invention, it is detected by the failing edge of the envelope to downgoing baseband signal,
Slot synchronization judgement is carried out using synchronous state machine to testing result, when synchronous regime is tracking mode, is simultaneously indicated
Signal and/or slot synchronization pulse, namely determine that the boundary of time slot realizes slot synchronization, it not only realizes simple but also reliable
Property and high stability, and then realized according to synchronous indicating signal and/or slot synchronization pulse and save power consumption, reduce low noise, auxiliary
It helps and realizes the functions such as ICS and statistics telephone traffic, greatly improve the comprehensive performance of base station.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program of upper implementation produces
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, equipment（System）And the flow of computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (13)
1. a kind of method of slot synchronization, which is characterized in that the method includes：
Failing edge detector obtains downgoing baseband signal, detects the failing edge of the envelope of the downgoing baseband signal, and will detection
As a result it is sent to synchro indicator, the downgoing baseband signal after handling descending time slot burst by obtaining；
Synchro indicator exports synchronous indicating signal and/or slot synchronization pulse according to testing result.
2. the method as described in claim 1, which is characterized in that the synchro indicator includes synchronous state machine unit, described
Synchro indicator exports synchronous indicating signal according to testing result and/or slot synchronization pulse specifically includes：
Synchronous state machine unit adjusts the synchronous regime of itself according to testing result；
Synchronous state machine unit exports synchronous indicating signal and/or slot synchronization pulse according to the synchronous regime after adjustment.
3. method as claimed in claim 2, which is characterized in that the synchronous regime include search condition, trapped state and with
Track state；Wherein, search condition is in system boot；
The synchronous state machine unit adjusts the synchronous regime of itself according to testing result, specifically includes：
Under search condition, if failing edge detector detects the failing edge of the envelope of downgoing baseband signal, synchronous state machine
Unit, which adjusts, itself enters trapped state, otherwise keeps search condition；
Under trapped state, if failing edge detector continuous first setting value time detects the decline of the envelope of downgoing baseband signal
Edge, then synchronous state machine unit, which adjusts, itself enters tracking mode, otherwise, enters search condition, first setting value
For the positive integer more than 1；
Under tracking mode, if failing edge detector continuous second setting value time is not detected under the envelope of downgoing baseband signal
Edge drops, then synchronous state machine unit, which adjusts, itself enters search condition, otherwise, continues to keep tracking mode, described second sets
Definite value is the positive integer more than 1.
4. method as claimed in claim 3, which is characterized in that the synchro indicator further includes detection window unit, time slot
Cycle rate counter, continuous detection counter and window width counter；Wherein, the detection window of detection window unit have opening and
Two states are closed, and under search condition, the detection window of detection window unit is kept open；Slot cycle counts
Device and window width counter carry out cycle subtraction count under the action of counting clock；Continuous detection counter is subtraction meter
Number device；
The method further includes：
Failing edge detector is when detecting the failing edge of envelope of the downgoing baseband signal, under being sent to detection window unit
Drop is along marker pulse；
The failing edge marker pulse received is sent to slot cycle by detection window unit when the detection window of itself is opened
Counter and synchronous state machine unit；The slot cycle counter reduces to 0 in count value or receives failing edge marker pulse
When, resetting count value is initial value；
It is described under search condition, if failing edge detector detects the failing edge of the envelope of downgoing baseband signal, synchronize shape
State machine unit, which adjusts, itself enters trapped state, otherwise keeps search condition, specifically includes：
Under search condition：
If synchronous state machine unit receives the failing edge marker pulse from detection window unit, adjusts itself and enter and catch
State is obtained, and indicates that detection window unit closes detection window, and the count value of itself is arranged in the continuous detection counter of instruction
For the first setting value, search condition is otherwise kept；
It is described under trapped state, if failing edge detector continuous first setting value time detects the envelope of downgoing baseband signal
Failing edge, then synchronous state machine unit, which adjusts, itself enters tracking mode, otherwise, enters search condition, specifically includes：
Under trapped state：
For slot cycle counter when the count value of itself reduces to third setting value, instruction detection window unit opens detection window
And window width counter carries out subtraction count from the 4th setting value, the 4th setting value is the first of window width counter
Initial value, and be twice of third setting value；
If synchronous state machine unit is received before the count value of window width counter reduces to 0 from detection window unit
Failing edge marker pulse, it indicates that detection window unit closes detection window, and indicates continuous detection counter by the meter of itself
Numerical value subtracts 1, otherwise return to search；
Synchronous state machine unit adjusts when the count value of continuous detection counter reduces to 0 and itself enters tracking mode, and instruction connects
It is the second setting value that the count value of itself, which is arranged, in continuous detection counter；
It is described under tracking mode, if the envelope of downgoing baseband signal is not detected in failing edge detector continuous second setting value time
Failing edge, then synchronous state machine unit, which adjusts, itself enters search condition, otherwise, continues to keep tracking mode, specific to wrap
It includes：
Under tracking mode：
For slot cycle counter when the count value of itself reduces to third setting value, instruction detection window unit opens detection window
And window width counter carries out subtraction count from the 4th setting value；
Synchronous state machine unit is receiving before the count value of window width counter reduces to 0 under detection window unit
When drop is along marker pulse, then detection window is closed, and indicate that the count value of itself is reset to second and set by continuous detection counter
Otherwise definite value indicates that the count value of itself is subtracted 1 by continuous detection counter, and indicate that detection window unit is counted in window width
When the count value of device reduces to 0, detection window is closed；
If the count value of continuous detection counter reduces to 0, synchronous state machine unit adjusts itself and enters search condition.
5. method as claimed in claim 4, which is characterized in that the synchronous state machine unit is according to the synchronous regime after adjustment
Synchronous indicating signal and/or slot synchronization pulse are exported, is specifically included：
Synchronous state machine unit is when itself enters tracking mode, set synchronous indicating signal；
Synchronous state machine unit resets synchronous indicating signal when itself exits tracking mode；
Synchronous state machine unit is when itself is in tracking mode, if being connect before the count value of window width counter reduces to 0
The failing edge marker pulse from detection window unit is received, then postpones the 5th setting value time output time solt lock-out pulse, it is no
Then, when the count value of slot cycle counter reduces to 0, postpone the 5th setting value time output time solt lock-out pulse.
6. the method as described in claim 1 to 5 is any, which is characterized in that the failing edge detector includes：Envelope amplitude meter
Unit and failing edge detection unit are calculated, the failing edge of the envelope of the downgoing baseband signal is detected especially by following methods：
Envelope amplitude computing unit calculates the envelope amplitude instantaneous value of each sampling point moment of downgoing baseband signal and exports extremely
Failing edge detection unit；
Envelope amplitude instantaneous value of the failing edge detection unit to each sampling point moment and the 6th setting before the sampling point moment
The envelope amplitude instantaneous value for being worth all sampling point moments within the time carries out average calculating operation, obtains the packet of the sampling point moment
Network amplitude average value；
Failing edge detection unit is when the envelope amplitude average value for sampling point moment is with first and sampling seven setting value of point moment
Between the ratio between the envelope amplitude average value of sampling point moment when being less than eight setting values, confirmly detect the packet of downgoing baseband signal
The failing edge of network.
7. a kind of slot synchronization equipment, which is characterized in that the slot synchronization equipment includes：Failing edge detector and synchronizing indication
Device；
The failing edge detector detects the failing edge of the envelope of the downgoing baseband signal for obtaining downgoing baseband signal,
And testing result is sent to synchro indicator, the downgoing baseband signal be by handling descending time slot burst after
It obtains；
Synchro indicator, for exporting synchronous indicating signal and/or slot synchronization pulse according to testing result.
8. slot synchronization equipment as claimed in claim 7, which is characterized in that the synchro indicator includes synchronous state machine list
Member；
The synchronous state machine unit, for adjusting the synchronous regime of itself according to testing result, and according to the synchronization after adjustment
State output synchronous indicating signal and/or slot synchronization pulse.
9. slot synchronization equipment as claimed in claim 8, which is characterized in that the synchronous regime includes search condition, capture
State and tracking mode；Wherein, search condition is in system boot；
The synchronous state machine unit is specifically used under search condition, if failing edge detector detects downgoing baseband signal
Envelope failing edge, then adjust and itself enter trapped state, otherwise keep search condition；Under trapped state, if declining
The failing edge that the envelope of downgoing baseband signal is detected along detector continuous first setting value time, then adjust and itself enter tracking
Otherwise state enters search condition；Under tracking mode, if failing edge detector continuous second setting value time is not detected
The failing edge of the envelope of downgoing baseband signal then adjusts and itself enters search condition, otherwise, continues to keep tracking mode, institute
It is the positive integer more than 1 to state the first setting value；Second setting value is the positive integer more than 1.
10. slot synchronization equipment as claimed in claim 9, which is characterized in that the synchro indicator further includes detection window
Unit, slot cycle counter, continuous detection counter and window width counter；
The failing edge detector is additionally operable to when detecting the failing edge of envelope of the downgoing baseband signal, to detection window
Mouth unit sends failing edge marker pulse；
The detection window unit is opened or closed for the control according to slot cycle counter and synchronous state machine unit
The failing edge marker pulse received is sent to slot cycle by the detection window of itself when the detection window of itself is opened
Counter and synchronous state machine unit；
The window width counter, for carrying out cycle subtraction count under the action of counting clock, according to slot cycle meter
The control of number device, starts subtraction count；
The slot cycle counter, for carrying out cycle subtraction count under the action of counting clock, count value reduce to 0 or
When receiving failing edge marker pulse, resetting count value is initial value, and under trapped state and under tracking mode, at itself
Count value when reducing to third setting value, instruction detection window unit opens detection window and window width counter from the 4th
Setting value carries out subtraction count, and the 4th setting value is the initial value of window width counter, and is the two of third setting value
Times；
The continuous detection counter, for carrying out subtraction count under the control of synchronous state machine unit；
The synchronous state machine unit is specifically used under search condition, and instruction detection window unit keeps the detection window of itself
Mouth is in the open state, if receiving the failing edge marker pulse from detection window unit, adjusts and itself enters capture
State, and indicate that detection window unit closes detection window, and indicate that continuous detection counter is arranged the count value of itself and is
First setting value, otherwise keeps search condition；Under trapped state, if before the count value of window width counter reduces to 0
Receive the failing edge marker pulse from detection window unit, it indicates that detection window unit closes detection window, and indicates
The count value of itself is subtracted 1 by continuous detection counter, and otherwise return to search, is reduced in the count value of continuous detection counter
It when 0, adjusts itself and enters tracking mode, it is the second setting value to indicate that the count value of itself is arranged in continuous detection counter；With
Under track state, the failing edge instruction from detection window unit is received before the count value of window width counter reduces to 0
When pulse, then detection window is closed, and indicate that the count value of itself is reset to the second setting value by continuous detection counter, otherwise
It indicates that the count value of itself is subtracted 1 by continuous detection counter, and indicates counting of the detection window unit in window width counter
When value reduces to 0, detection window is closed, when the count value of continuous detection counter reduces to 0, itself is adjusted and enters search condition.
11. slot synchronization equipment as claimed in claim 10, which is characterized in that the synchronous state machine unit is specifically used for
When itself enters tracking mode, set synchronous indicating signal；When itself exits tracking mode, synchronous indicating signal is resetted；
When itself is in tracking mode, if being received before the count value of window width counter reduces to 0 from detection window list
The failing edge marker pulse of member then postpones the 5th setting value time output time solt lock-out pulse, otherwise, in slot cycle counter
Count value when reducing to 0, postpone the 5th setting value time output time solt lock-out pulse.
12. the slot synchronization equipment as described in claim 7 to 11 is any, which is characterized in that the failing edge detector includes：
Envelope amplitude computing unit and failing edge detection unit；
The envelope amplitude computing unit, the envelope amplitude instantaneous value of each sampling point moment for calculating downgoing baseband signal
And it exports to failing edge detection unit；
The failing edge detection unit, before to each envelope amplitude instantaneous value for sampling point moment and the sampling point moment
The envelope amplitude instantaneous value of all sampling point moments within 6th setting value time carries out average calculating operation, obtains the sampled point
The envelope amplitude average value at moment；Envelope amplitude average value in sampling point moment and first and the 7th setting value of sampling point moment
When the ratio between envelope amplitude average value of sampling point moment of time is less than eight setting values, downgoing baseband signal is confirmly detected
The failing edge of envelope.
13. a kind of base station, which is characterized in that the base station includes any slot synchronization equipment in claim 7-12.
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| CN1897478A (en) * | 2006-06-23 | 2007-01-17 | 京信通信技术(广州)有限公司 | Wave-detecting synchronizer of time-division synchronizing CDMA digital high-frequency amplification station |
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| US6151374A (en) * | 1996-03-04 | 2000-11-21 | Mitsubishi Denki Kabushiki Kaisha | Synchronizing signal detecting apparatus |
| US8385373B2 (en) * | 2008-06-24 | 2013-02-26 | Adc Telecommunications, Inc. | Method and apparatus for frame detection in a communications system |
| CN101841369A (en) * | 2009-03-16 | 2010-09-22 | 北京东方信联科技有限公司 | Device for extracting and amplifying TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) signal from compound optical signal |
| CN101605004B (en) * | 2009-07-31 | 2012-07-18 | 中国电子科技集团公司第四十一研究所 | Device and method for analyzing and measuring quality of TD-HSUPA signals |
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| CN103051372B (en) * | 2011-10-13 | 2015-07-01 | 京信通信系统（中国）有限公司 | Synchronization method and device of WiMAX (Worldwide Interoperability for Microwave Access) repeater |
| CN103297060B (en) * | 2013-06-28 | 2016-08-17 | 上海爱信诺航芯电子科技有限公司 | A kind of decoding circuit being applicable to two-forty correction miller coding signal |
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