CN105141337B - A kind of receiver for spread spectrum communication vacation lock recognition methods - Google Patents
A kind of receiver for spread spectrum communication vacation lock recognition methods Download PDFInfo
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Abstract
A kind of receiver for spread spectrum communication vacation lock recognition methods, the steps include: S1: to need the signal trace channel loop carrying out lock-in detection identification to be passage to be detected；S2: after passage to be detected locks, by arbiter, is judged as passage to be detected doubtful false lock access, or is judged as that locking is correct, terminate to differentiate；S3: increase an independent signal trace channel loop as differentiating passage；S4: start and differentiate passage, sends into the signal capture result obtained in real time and differentiates passage；S5: after differentiating passage locking, start and follow the tracks of difference detection module, reads doubtful passage in real time, differentiates that the carrier frequency of passage output, code phase data contrast；S6: judge；S7: step S4, S5, S6 are repeated several times.The present invention has and is easily achieved, detects the identification advantage such as reliable, applied widely.
Description
Technical field
Present invention relates generally to the design field of the Spread Spectrum Digital receivers such as Spread Spectrum TT&C answering machine, incoherent band spread receiver,
Refer in particular to a kind of Spread Spectrum Digital receiver vacation lock recognition methods.
Background technology
Spread spectrum is widely used in Satellite TT system, and the space application of spread spectrum, one side can realize to be possessed relatively
High sensitivity and the communication system of interference free performance, on the other hand, can complete the functions such as high-precision measurement orbit determination.Along with
Employing the increase of the number of satellite of spread spectrum, the spread-spectrum signal between satellite can mutually form interference, and country variant, no
Same track, the satellite of different application type, the power of its spread-spectrum signal is each different.Simultaneously take account of some hostile malicious interference
Signals etc., under the electromagnetic background of this complexity, band spread receiver is faced with the spread-spectrum signal detection integrity problem of sternness.
The signal acquisition phase that band spread receiver detects at spread-spectrum signal, if current demand signal does not include use (correctly) signal,
Simply there is useful signal in some interference signals, or current demand signal, but interference signal intensity substantially exceeds useful signal, catches
Obtain and can there is certain false-alarm probability, cause receiver to be locked on interference signal, " false lock " i.e. occurs.This situation is in interference
It is easier to when signal is stronger occur, no matter this signal uses what type of spread spectrum code.For reducing false-alarm probability, it is generally required to lift
High detection threshold, and raising of detection threshold also can reduce acquisition probability while reducing false-alarm probability, thus affect receiver
Sensitivity, the signal capture sensitivity under the most hostile jamming pattern, this impact is especially pronounced in high sensitive receiver.
The receiver vacation lock that false-alarm causes after occurring, receiver cannot exit locking, and receiver can be stoped to demodulate the reception of normal signal,
Cause receiver to lose efficacy, even can demodulate out by the fallacious message carried in interference signal, the normal work of interference stay of two nights end main frame
Making, the harm of receiver vacation lock is significant.In order to determine that present receiving machine the most correctly locks, receiver needs possess one
A little detection methods identify locking or false lock, and vacation lock the most once occurs, and receiver can exit locking.
Current existing false lock detection method includes, acquisition phase uses many blob detection, cross-correlation test, tracking phase to utilize expansion
Code ring working condition is made decisions by frequency code correlation properties, quadrature demodulation IQ road energy ratio, demodulation signal to noise ratio, Information Level identification etc.
Signal detecting method.Wherein, the detection of signals layer is based primarily upon auto-correlation and the cross correlation of spread spectrum code, can be by arranging
Thresholding compares effective false lock and identifies, but thresholding arranges relevant with signal intensity, noise level etc., can affect the interference back of the body
Signal capture sensitivity behaviour under scape.And some is used spread spectrum code as the expansion of unique link identification feature by identifying of Information Level
Frequently system is inapplicable, and simultaneously along with the increase of the number of satellite employing spread spectrum, the spread-spectrum signal between satellite can mutual shape
Becoming interference, the Information Level feature of the satellite spread-spectrum signal of this same type is often similar, and can not effectively distinguish.Can from above
Knowing, the development of current all kinds of Satellite TT Spread Spectrum Digital receivers the most inevitably encounters false lock problem.Existing vacation
Lock detection method utilizes auto-correlation and the cross correlation of spread spectrum code, and the cross-correlation of high reject signal is likely to and weak useful signal
Auto-correlation close to even more than auto-correlation, its detection threshold arrange inevitably with the intensity of useful signal, disturb signal
Intensity is relevant, thus affects interference free performance and the sensitivity of receiver.
Summary of the invention
The technical problem to be solved in the present invention is that the technical problem existed for prior art, and the present invention provides one to be prone to
Realize, detection identifies receiver for spread spectrum communication vacation lock recognition methods reliable, applied widely.
For solve above-mentioned technical problem, the present invention by the following technical solutions:
A kind of receiver for spread spectrum communication vacation lock recognition methods, the steps include:
S1: to need the signal trace channel loop carrying out lock-in detection identification to be passage to be detected；
S2: after passage to be detected locks, by arbiter, is judged as passage to be detected doubtful false lock access, or is judged as
Locking is correct, terminates to differentiate；
S3: increase an independent signal trace channel loop as differentiating passage；
S4: start and differentiate passage, sends into the signal capture result obtained in real time and differentiates passage；
S5: after differentiating passage locking, start and follow the tracks of difference detection module, reads doubtful passage in real time, differentiates passage output
Carrier frequency, code phase data contrast；
S6: if the carrier frequency of doubtful passage and the carrier frequency difference differentiating passage exceed tracking phase-locked loop range of error,
Or the code phase of doubtful false lock access exceedes tracking code ring loop error scope with the code phase difference differentiating passage, then it is assumed that doubt
Lock like passage vacation；Otherwise it is assumed that doubtful passage is correct for locking；
S7: step S4, S5, S6 are repeated several times, if wherein certain number of times detection thinks that doubtful passage vacation is locked, then confirms doubtful vacation
Lock access vacation is locked, and reset doubtful channels track loop, and signal is recaptured by receiver, terminates identification process；Or, if its
In certain number of times detection think that doubtful false lock access locking is correct, then confirm that doubtful false lock access locking is correct, terminate identification process.
As a further improvement on the present invention: the flow process of described step S2 is:
S201: receiver tracking channel to be detected, has passed through conventional lock-in detection it is considered to be lock；
S202: start arbiter, utilizes conventional lock-in detection mechanism, and such as receiver demodulation signal to noise ratio is less than a thresholding, will
It is probably the tracking channel to be detected of false lock, adjudicates as doubtful false lock access；Otherwise, adjudicate tracking channel to be detected locking correctly,
Terminate to differentiate.
As a further improvement on the present invention: in described step S3, receiver is on the basis of original signal trace passage, increase solely
Vertical signal trace passage.
As a further improvement on the present invention: described step S4 differentiating, channel start to the idiographic flow of locking is:
S401: passage to be detected is judged as doubtful false lock access；
S402: start and differentiate passage, and notify receiver signal trapping module, current capture result will be sent to differentiate passage；
S403: signal capture module suitably relaxes signal detecting threshold；
S404: signal capture module uses the detection threshold after relaxing to carry out the capture of signal；
S405: after acquisition success, trapping module detection threshold is recovered normal, and is sent to capture result differentiate passage；
S406: differentiate that passage proceeds by the tracking of signal, if carrier phase-locked loop convergence, spread spectrum code code ring convergence, then differentiates logical
Road locks；Otherwise enter step S404.
As a further improvement on the present invention: described step S6 includes wave frequency and code phase comparison flow process, and flow process is:
S601: set carrier phase-locked loop range of error used by receiver as ± a Hz, receiver spread spectrum used code code ring error is ± b
Individual chip；The spread spectrum code cycle that receiver correspondence spread spectrum communication system uses is L, then L spread spectrum code code phase numerical tabular respectively
It is shown as 0.1.2.3.4 ... L-1；
S602: set current time, carrier frequency CA of doubtful false lock access carrier phase-locked loop output, differentiate channel carrier phaselocked loop
Carrier frequency CB of output；
S603: setting current time, the spread spectrum code code phase numerical value of doubtful false lock access code ring output is PA (PA ∈ [0, L-1]),
Differentiate that the spread spectrum code code phase numerical value that channel code ring exports is PB (PB ∈ [0, L-1])；
S604: if | PA PB |>2*b, and | PA PB |<(L-1-2*b), then it is assumed that doubtful false lock access vacation lock, enter
Step S607；Otherwise, step S605 is entered；
S605: A is converted to Hz, is designated as AHz, and B is converted to Hz, is designated as BHz；
S606: if | AHz BHz | > 2*a, then it is assumed that doubtful false lock access vacation lock, otherwise it is assumed that doubtful false lock access is just locking
Really；
S607: terminate this comparison.
As a further improvement on the present invention: also include the flow process repeatedly differentiating accumulative sentence, concretely comprising the following steps of this flow process:
S1001: judge that present receiving machine is locked as doubtful false lock access, start and differentiate；
S1002: reset and differentiate passage, obtains captured in real time result, differentiates that passage completes signal trace；
S1003: this differentiates to think that doubtful false lock access vacation lock, doubtful false lock access vacation lock enumerator add 1, enter step S1005；
Otherwise, step S1004 is entered；
S1004: doubtful false lock access locks correct enumerator and adds 1, enters step S1007；
S1005: if doubtful false lock enumerator is more than or equal to M, then the doubtful false lock access vacation lock of conclusive judgement；Otherwise enter step
S1002；
S1006: terminate receiver locking and differentiate, reset doubtful false lock access, and receiver losing lock, entrance is recaptured；
S1007: if doubtful false lock access locks correct enumerator and is more than or equal to N, the most finally determines that doubtful false lock access locking is correct,
Terminating the false lock discriminating process of receiver locking, receiver completes semaphore lock；Otherwise enter step S1002.
Compared with prior art, it is an advantage of the current invention that:
The present invention a kind of receiver for spread spectrum communication vacation lock recognition methods, it is easy to accomplish, detection identify reliable, applied widely,
It is unrelated with receiver sensitivity unrelated with receiver parameters；It utilizes the modulated carrier frequencies of spread-spectrum signal, spread spectrum code code-phase
Position differentiates, its Detection results is unrelated with signal statistics, by demodulation output result in the case of correct locking and false lock
Difference make decisions, there is high reliability and engineering feasibility.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the present invention.
Fig. 2 is the schematic flow sheet that the present invention carries out that in concrete application example passage to be detected locking differentiates.
Fig. 3 is the schematic flow sheet that the present invention carries out differentiating channel start in concrete application example.
Fig. 4 is that the present invention carries out carrier frequency and the schematic flow sheet of code phase comparison in concrete application example.
Fig. 5 is the schematic flow sheet that the present invention repeatedly differentiates accumulative sentence in concrete application example.
Fig. 6 is the embodiment schematic diagram that application the inventive method carries out that false lock identifies.
Detailed description of the invention
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
As it is shown in figure 1, a kind of receiver for spread spectrum communication vacation lock recognition methods of the present invention, the steps include:
S1: to need the signal trace channel loop carrying out lock-in detection identification to be passage to be detected；
S2: after passage to be detected locks, by arbiter, is judged as that by passage to be detected doubtful false lock access is (the most doubtful
Passage), or it is judged as that locking is correct, terminate to differentiate；
S3: increase an independent signal trace channel loop (copy of receiver signal tracking module) as differentiating passage；
S4: start and differentiate passage, sends into the signal capture result obtained in real time and differentiates passage；
S5: after differentiating passage locking, start and follow the tracks of difference detection module, reads doubtful passage in real time, differentiates passage output
Carrier frequency, code phase data contrast；
S6: if the carrier frequency of doubtful passage and the carrier frequency difference differentiating passage exceed tracking phase-locked loop range of error,
Or the code phase of doubtful passage exceedes tracking code ring loop error scope with the code phase difference differentiating passage, then it is assumed that doubtful logical
Road vacation lock；Otherwise it is assumed that doubtful passage is correct for locking；
S7: step S4, S5, S6 are repeated several times, if wherein M detection thinks that doubtful passage vacation is locked, then confirms doubtful passage
False lock, reset doubtful channels track loop, and signal is recaptured by receiver, terminates identification process；Or, if wherein n times
Detection thinks that the locking of doubtful passage is correct, then confirm that the locking of doubtful passage is correct, terminate identification process.
As in figure 2 it is shown, in concrete application example, the idiographic flow that in step S2, passage to be detected locking differentiates is:
S201: receiver tracking channel to be detected, has passed through conventional lock-in detection (as phaselocked loop is restrained) it is considered to be lock；
S202: start arbiter, still with conventional lock-in detection mechanism, such as receiver demodulation signal to noise ratio snr is less than one
Thresholding (can pre-set a rough thresholding X), it would be possible to is the tracking channel to be detected of false lock, adjudicates as doubtful false lock logical
Road；Otherwise, adjudicate tracking channel to be detected locking correctly, terminate to differentiate.
In concrete application example, in step S3, receiver is on the basis of original signal trace passage, adds independent signal
Tracking channel, can be copy based on receiver signal tracking module, it is also possible to similar to receiver signal tracking module
Design simplifies version, differentiates designated lane as vacation lock.
As it is shown on figure 3, in concrete application example, step S4 differentiating, channel start to the idiographic flow of locking is:
S401: passage to be detected is judged as doubtful false lock access；
S402: start and differentiate passage, and notify receiver signal trapping module, current capture result will be sent to differentiate passage；
S403: signal capture module suitably relaxes signal detecting threshold (making signal detection be easier to successfully)；
S404: signal capture module uses the detection threshold after relaxing to carry out the capture of signal；
S405: after acquisition success, trapping module detection threshold is recovered normal, and is sent to capture result differentiate passage；
S406: differentiate that passage proceeds by the tracking of signal, if carrier phase-locked loop convergence, spread spectrum code code ring convergence, then differentiates logical
Road locks；Otherwise enter step S404.
In concrete application example, in described step S5, S6, differentiate the foundation that doubtful false lock access the most correctly locks, be base
In doubtful passage and a kind of comparison of the signal real-time tracking result differentiating passage, comparison object can be the carrier wave after trace demodulation
Frequency and spread spectrum code code phase, can also only spread spectrum code code phase after comparison trace demodulation.
As shown in Figure 4, in concrete application example, step S6 farther includes wave frequency and code phase comparison flow process, this stream
Cheng Wei:
S601: set carrier phase-locked loop range of error used by receiver as ± a Hz, receiver spread spectrum used code code ring error is ± b
Individual chip.The spread spectrum code cycle that receiver correspondence spread spectrum communication system uses is L, then L spread spectrum code code phase numerical tabular respectively
It is shown as 0.1.2.3.4 ... L-1；
S602: set current time, carrier frequency CA of doubtful channel carrier phaselocked loop output, differentiate the output of channel carrier phaselocked loop
Carrier frequency CB；
S603: setting current time, the spread spectrum code code phase numerical value of doubtful channel code ring output is PA (PA ∈ [0, L-1]), mirror
The spread spectrum code code phase numerical value of other channel code ring output is PB (PB ∈ [0, L-1])；
S604: if | PA PB |>2*b, and | PA PB |<(L-1-2*b), then it is assumed that doubtful passage vacation is locked, and enters step
S607；Otherwise, step S605 is entered；
S605: A is converted to Hz, is designated as AHz, and B is converted to Hz, is designated as BHz；
S606: if | AHz BHz | > 2*a, then it is assumed that doubtful passage vacation is locked, otherwise it is assumed that the locking of doubtful passage is correct；
S607: terminate this comparison.
As it is shown in figure 5, as preferred embodiment, this example farther includes repeatedly to differentiate the flow process of accumulative sentence, this flow process
Concretely comprise the following steps:
S1001: judge that present receiving machine is locked as doubtful false lock (doubtful false lock access), start and differentiate；
S1002: reset and differentiate passage, obtains captured in real time (recapture) result, differentiates that passage completes signal trace；
S1003: this discriminating thinks that doubtful passage vacation is locked, doubtful passage vacation lock enumerator adds 1, enters step S1005；Otherwise,
Enter step S1004；
S1004: doubtful passage locks correct enumerator and adds 1, enters step S1007；
S1005: if doubtful false lock enumerator is more than or equal to M, then conclusive judgement doubtful passage vacation lock；Otherwise enter step S1002；
S1006: terminating receiver locking and differentiate, reset doubtful passage, receiver losing lock, and entrance is recaptured；
S1007: if doubtful passage locks correct enumerator and is more than or equal to N, the most finally determines that the locking of doubtful passage is correct, terminates to connect
The false lock discriminating process of receipts machine locking, receiver completes semaphore lock；Otherwise enter step S1002.
As shown in Figure 6, for using the inventive method application example on certain model star-carrying multichannel band spread receiver:
(1), CAP be receiver multichannel trapping module, LINK_CTRL is receiver Logical link control module, TRK_1,
TRK_2, TRK_3 are respectively three independent logical links tracking modules, and it is right that FD_1, FD_2, FD_3 are respectively each tracking
The false lock identification module answered；
(2), illustrate as a example by TRK_1 with FD_1；
(3), receiver starts, after the capture result of link 1 is sent into TRK_1, TRK_1 locking by CAP, by track loop
{ code phase PA} sends into vacation lock identification module FD_1 for signal to noise ratio snr, carrier frequency carr_freq in the information combination of output in real time；
(4), FD_1 locking decision device compare snr and signal-noise ratio threshold X (such as X=20dB), if snr >=20, then adjudicate
TRK_1 locking is correct, and false lock detection process completes.If snr < 20, then the repeated detection controller of FD_1 starts, for TRK_1
The discriminating of false lock start；
(5), FD_1 obtain the capture result of link 1 that CAP sends here, comprise carrier frequency (carr_freq_init) and code
Phase place (pn_init) information.
(6), in view of the nervous problem of receiver hardware resource under multichannel, this embodiment employs the signal of simplification with
The copy of track module, i.e. FD_1 only used a code phase and follow the tracks of synchronization loop (such as DLL code ring), for according to capture
Result pn_init obtains signal real-time code phase PB.Carrier frequency directly uses carr_freq_init value, and error is capture frequency
Precision (such as 200Hz).
(7), after the locking of the code ring of FD_1, start and follow the tracks of difference detector, the load that contrast TRK_1 Yu FD_1 each exports
Wave frequency and code phase values.
(8), the carrier frequency offset after the locking of example design track loop is less than 0.5 code-phase less than 10Hz, code phase deviation
Position, the code phase cycle is L.| carr_freq_init carr_freq | > 2* (200+10) Hz if then, or | PA PB | > 2*0.5
And | PA PB | < (L-1-2*0.5), this false lock testing result is " doubtful false lock ", and doubtful false lock enumerator adds 1.Otherwise,
Correct lock count device adds 1.
(9), the code ring of the repeated detection controller reset FD_1 of FD_1, continue to obtain link 1 and capture result, enter next
Secondary detection, so repeats.
(10) if doubtful false lock enumerator is more than or equal to M (such as M=3), then conclusive judgement TRK_1 vacation lock, FD_1 exports
False_en signal sends out rst reseting signal reset TRK_1 to LINK_CTRL, LINK_CTR, and link 1 enters and recaptures.
(11) if locking correct enumerator to be more than or equal to N (such as N=3), then TRK_1 discrimination process all terminates, TKR_1
Maintain locking.
(12), from the point of view of this exemplary application, spread spectrum code period L, raising tracking carrier wave ring and code that spread spectrum system uses are lengthened
Ring precision or capture output frequency precision etc., all can improve the identification probability of vacation of the present invention lock recognition methods；And improve M, N value
Expand detection sample number, testing result confidence level can be improved.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment, all belongs to
Technical scheme under thinking of the present invention belongs to protection scope of the present invention.It should be pointed out that, the ordinary skill for the art
For personnel, some improvements and modifications without departing from the principles of the present invention, should be regarded as protection scope of the present invention.
Claims (6)
1. a receiver for spread spectrum communication vacation lock recognition methods, it is characterised in that step is:
S1: to need the signal trace channel loop carrying out lock-in detection identification to be passage to be detected；
S2: after passage to be detected locks, by arbiter, is judged as passage to be detected doubtful false lock access, or is judged as
Locking is correct, terminates to differentiate；
S3: increase an independent signal trace channel loop as differentiating passage；
S4: start and differentiate passage, sends into the signal capture result obtained in real time and differentiates passage；
S5: after differentiating passage locking, start and follow the tracks of difference detection module, reads doubtful false lock access in real time, differentiates that passage is defeated
The carrier frequency, the code phase data that go out contrast；
S6: if the carrier frequency of doubtful false lock access and the carrier frequency difference differentiating passage exceed tracking phase-locked loop error model
Enclose, or the code phase of doubtful false lock access exceedes tracking code ring loop error scope with the code phase difference differentiating passage, then recognize
For doubtful false lock access vacation lock；Otherwise it is assumed that doubtful false lock access is correct for locking；
S7: step S4, S5, S6 are repeated several times, if wherein certain number of times detection thinks that doubtful false lock access vacation is locked, then confirms to doubt
Like false lock access vacation lock, reset doubtful false lock access track loop, and signal is recaptured by receiver, terminates identification process；Or
Person, if wherein certain number of times detection thinks that doubtful false lock access locking is correct, then confirms that doubtful false lock access locking is correct, terminates
Identification process.
Receiver for spread spectrum communication vacation the most according to claim 1 lock recognition methods, it is characterised in that the stream of described step S2
Cheng Wei:
S201: receiver tracking channel to be detected, has passed through conventional lock-in detection it is considered to be lock；
S202: start arbiter, utilizes conventional lock-in detection mechanism, it would be possible to be the tracking channel to be detected of false lock, adjudicates and is
Doubtful false lock access；Otherwise, adjudicate tracking channel to be detected locking correctly, terminate to differentiate.
Receiver for spread spectrum communication vacation the most according to claim 1 lock recognition methods, it is characterised in that in described step S3
Receiver, on the basis of original signal trace passage, increases independent signal trace passage.
Receiver for spread spectrum communication vacation the most according to claim 1 lock recognition methods, it is characterised in that in described step S4
Differentiate that channel start to the idiographic flow of locking is:
S401: passage to be detected is judged as doubtful false lock access；
S402: start and differentiate passage, and notify receiver signal trapping module, current capture result will be sent to differentiate passage；
S403: signal capture module suitably relaxes signal detecting threshold；
S404: signal capture module uses the detection threshold after relaxing to carry out the capture of signal；
S405: after acquisition success, trapping module detection threshold is recovered normal, and is sent to capture result differentiate passage；
S406: differentiate that passage proceeds by the tracking of signal, if carrier phase-locked loop convergence, spread spectrum code code ring convergence, then differentiates logical
Road locks；Otherwise enter step S404.
Receiver for spread spectrum communication vacation the most according to claim 1 lock recognition methods, it is characterised in that in described step S6
Including wave frequency and code phase comparison flow process, flow process is:
S601: set carrier phase-locked loop range of error used by receiver as ± a Hz, receiver spread spectrum used code code ring error is ± b
Individual chip；The spread spectrum code cycle that receiver correspondence spread spectrum communication system uses is L, then L spread spectrum code code phase numerical tabular respectively
It is shown as 0.1.2.3.4 ... L-1；
S602: set current time, carrier frequency CA of doubtful false lock access carrier phase-locked loop output, differentiate channel carrier phaselocked loop
Carrier frequency CB of output；
S603: setting current time, the spread spectrum code code phase numerical value of doubtful false lock access code ring output is PA (PA ∈ [0, L-1]),
Differentiate that the spread spectrum code code phase numerical value that channel code ring exports is PB (PB ∈ [0, L-1])；
S604: if | PA PB |>2*b, and | PA PB |<(L-1-2*b), then it is assumed that doubtful false lock access vacation lock, enter
Step S607；Otherwise, step S605 is entered；
S605: A is converted to Hz, is designated as AHz, and B is converted to Hz, is designated as BHz；
S606: if | AHz BHz | > 2*a, then it is assumed that doubtful false lock access vacation lock, otherwise it is assumed that doubtful false lock access is just locking
Really；
S607: terminate this comparison.
Receiver for spread spectrum communication vacation the most according to claim 1 lock recognition methods, it is characterised in that also include repeatedly differentiating
The flow process of accumulative sentence, concretely comprising the following steps of this flow process:
S1001: judge that present receiving machine is locked as doubtful false lock access, start and differentiate；
S1002: reset and differentiate passage, obtains captured in real time result, differentiates that passage completes signal trace；
S1003: this differentiates to think that doubtful false lock access vacation lock, doubtful false lock access vacation lock enumerator add 1, enter step S1005；
Otherwise, step S1004 is entered；
S1004: doubtful false lock access locks correct enumerator and adds 1, enters step S1007；
S1005: if doubtful false lock enumerator is more than or equal to M, then the doubtful false lock access vacation lock of conclusive judgement；Otherwise enter step
S1002；
S1006: terminate receiver locking and differentiate, reset doubtful false lock access, and receiver losing lock, entrance is recaptured；
S1007: if doubtful false lock access locks correct enumerator and is more than or equal to N, the most finally determines that doubtful false lock access locking is correct,
Terminating the false lock discriminating process of receiver locking, receiver completes semaphore lock；Otherwise enter step S1002.
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| CN105141337A (en) | 2015-12-09 |
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