CN109743100A - The multi-user channel distribution method of capturing information based on Big Dipper short message system - Google Patents
The multi-user channel distribution method of capturing information based on Big Dipper short message system Download PDFInfo
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Abstract
The multi-user channel distribution method of capturing information disclosed by the invention based on Big Dipper short message system, belongs to navigational communications field.Implementation method of the present invention is as follows: capturing information and capture mark are passed to multi-user's distribution module by trapping module, define and name mark and channel end instruction respectively；When distribution module receives capture mark when channel, compares the phase difference of the capturing information and all capturing informations just in occupied channel that are identified to come with capture, judge whether capturing information needs to distribute；The capturing information distributed will be needed to distribute into the largest number of vacant channel, assignment channel occupies and is identified as 1；At the end of the decoding in channel or when frame synchronization fails, assignment channel end instruction is 1；When the channel end in channel instruction is 1, enables the channel in channel occupy mark, capturing information duplicate marking and channel end instruction and reset, this channel switchs to idle state.It repeats above step and realizes efficient and orderly channel distribution task.
Description
Technical field
The present invention relates to a kind of multi-user channel distribution methods of capturing information based on Big Dipper short message system, belong to and lead
The boat communications field.
Background technique
In Big Dipper short message module, there are multiple users, but since satellite resource is limited and the spreading code of different user
Using same, so often trapping module can only have one, but the data information of multiple users is different, therefore is directed to
In each user, corresponding frame synchronization has been required, tracking, despreading, demodulation, decoding module constitute its multi-user's treatment channel.
And the characteristics of due to frame structure, in same frame, can be captured to repeatedly same user, but because resource is restricted,
Capturing information is directly just distributed into subsequent frame synchronization, tracking, despreading, demodulation, decoding module institute after can not capturing once
Multi-user's treatment channel of composition needs multi-user's treatment channel distribution module to catch single trapping module so here relating to
The capturing information of the multiple users received efficiently and be respectively allocated in an orderly manner corresponding multi-user's treatment channel carry out it is respective
Frame synchronization, tracking, despreading, demodulation, decoding procedure.
Summary of the invention
What the multi-user channel distribution method of the capturing information disclosed by the invention based on Big Dipper short message system to be solved
Technical problem is: the capturing information for multiple users that single trapping module captures efficiently and in an orderly manner being distributed into corresponding more
In user's treatment channel, for handling subsequent frame synchronization, tracking, despreading, demodulation, decoding function.It innovatively defines and orders
Name channel occupies mark, channel capturing information duplicate marking, channel end instruction, wherein channel capturing information duplicate marking is real
The now examination to the capturing information that may repeat in same frame, avoid wasting subsequent frame synchronization, tracking, despreading, demodulation,
The resource of decoding module；Channel occupies mark and utilizes multi-user's channel number large size preferential principle, guarantees the height of channel distribution
Effect and orderly progress；Channel end instructs the method discharged based on two kinds of channels, so that subsequent frame synchronization, tracking, despreading, solution
Multi-user's treatment channel composed by tune, decoding module switchs to idle state in time, improves the utilization efficiency of the module.
The purpose of the present invention is what is be achieved through the following technical solutions.
The realization side of the multi-user channel distribution method of capturing information disclosed by the invention based on Big Dipper short message system
Method is as follows: capturing information and capture mark are passed to multi-user's distribution module by trapping module, and define and name capture respectively
Information, capture identify, occupancy capturing information, channel occupancy mark, channel capturing information duplicate marking, channel end refer in channel
It enables.When channel distribution module receive capture mark when, by comparing with capture be identified to come capturing information and it is all
The phase difference of capturing information in occupied channel, judges whether capturing information needs to distribute.The capture letter that will need to distribute
Breath is distributed into the largest number of vacant channel, carries out subsequent processing, and the channel in this channel of assignment occupies and is identified as 1.When
At the end of decoding in channel or when frame synchronization fails, the channel end instruction in this channel of assignment is 1.When the channel in channel is tied
When Shu Zhiling is 1, enables the channel in channel occupy mark, capturing information duplicate marking and channel end instruction and reset, this channel turns
For idle state.It repeats above step and realizes efficient and orderly channel distribution task.
The multi-user channel distribution method of capturing information disclosed by the invention based on Big Dipper short message system, including it is as follows
Step:
Step 1: trapping module by capturing information and capture mark pass to multi-user's distribution module, and respectively name and
Define capturing information and capture mark.
Capturing information and capture mark are passed to multi-user's distribution module by trapping module, and how general the capturing information include
Frequency and phase information are strangled, index_max_in is named as, it is described to capture the useful id signal for being identified as capturing information, name
For index_max_nd.
Step 2: respectively N paths are named and is defined with respective channel and occupies mark, channel capturing information repetition mark
Know, occupy capturing information in channel, when capture, which is identified to, to be come, mark is occupied by the channel of the i-th paths and judges that the i-th tunnel is logical
The occupancy situation in road, if channel occupies, comparison is identified while being occupied in the capturing information and the i-th paths of arrival with capture and catches
Information is obtained to determine whether repeating, and according to judging result assignment the i-th paths capturing information duplicate marking, if channel does not account for
With then the i-th paths of assignment capturing information duplicate marking is 1.
Step 2.1: respectively N paths being named and defined with respective channel and occupies mark, channel capturing information repetition mark
Know, occupy capturing information in channel.
Whether the channel occupies identifies the frame synchronization referred in the i-th paths, tracking, despreading, demodulation, decoding just in work
The mark of work, the gap marker of the i-th paths of name are index_max_cs_i, in which: i=1 ... N.If in the i-th paths
Frame synchronization, tracking, despreading, demodulation, decoding module working, then the channel for defining the i-th paths occupies mark index_
Max_cs_i is 1, if frame synchronization, tracking in the i-th paths, despreading, demodulation, decoding module do not work, defines the i-th tunnel
It is 0 that the channel in channel, which occupies mark index_max_cs_i,.
The channel capturing information duplicate marking refers to that the capturing information handled in the i-th paths is identified with capture
The whether duplicate mark of capturing information reached simultaneously, the channel capturing information duplicate marking of the i-th paths of name are cmp_
State_i, in which: i=1 ... N.If the capturing information that is being handled in the i-th paths and with the arrival simultaneously of capture mark
The phase difference of capturing information is greater than or equal to threshold value, shows that capturing information does not repeat, then defines the channel capture letter of the i-th paths
Ceasing duplicate marking cmp_state_i is 1, if phase difference is less than threshold value, shows that capturing information repeats, then defines the i-th paths
Channel capturing information duplicate marking cmp_state_i be 0.
Capturing information in the channel, which refers to, to be distributed by multi-user's distribution module into the capture handled in the i-th paths
Information, naming the capturing information in the channel of the i-th paths is index_max_out_i, in which: i=1 ... N.
Step 2.2: when capture, which is identified to, to be come, mark being occupied by the channel of the i-th paths and judges accounting for for the i-th paths
With situation, if the i-th paths are occupied, the capturing information and the i-th paths that identify while reaching with capture by comparison
Channel in capturing information to determine whether repeating, and according to judging result assignment the i-th paths capturing information duplicate marking；
If the i-th paths are unoccupied, assignment the i-th paths capturing information duplicate marking is 1.
When capture mark index_max_nd arrives, the channel for reading N paths respectively occupies mark, when the i-th tunnel
When channel occupancy mark index_max_cs_i is 1, then show the capturing information in the i-th paths just in treatment channel
index_max_out_i.Comparison is with the capturing information in the channel of capture identifies while reaching capturing information and the i-th paths
Whether the phase difference of index_max_out_i reaches whether threshold decision capturing information repeats.If identify while arriving with capture
Capturing information in the channel of the capturing information and the i-th paths that reach repeats, then the channel capturing information on the i-th tunnel of assignment repeats to mark
Knowing cmp_state_i is 0.If do not repeated, the channel capturing information duplicate marking cmp_state_i on the i-th tunnel of assignment is 1.
If the channel occupancy mark index_max_cs_i on the i-th tunnel is 0, the channel capturing information duplicate marking on the i-th tunnel of assignment
Cmp_state_i is 1.
Step 3: it by the channel capturing information duplicate marking of N paths, provides with capture capture mark while reached
The result whether information needs to distribute.Unoccupied channel is found according to judging result, will be identified with capture while what is reached catches
It obtains and carries out subsequent processing in the information distribution the largest number of vacant channel of stand in channel, and the assignment channel occupies and is identified as 1, if
All channels occupy, and abandon the subsequent processing of this capturing information.
Step 3.1: by the channel capturing information duplicate marking of N paths, provide with capture mark simultaneously arrival catch
Obtain the result whether information needs to distribute.
By the channel capturing information duplicate marking of N paths, obtains identifying with capture while the capturing information reached is
The no result for needing to distribute.Judgment method are as follows: if it is not 1 that the channel capturing information duplicate marking of N paths, which has one, table
The bright capturing information for identifying while reaching with capture is carrying out subsequent frame synchronization, tracking, despreading, demodulation, work decoding, no
Channel distribution is carried out in N paths again.If all 1, would show with capture mark while the capturing information of arrival is not in N
Paths carry out subsequent frame synchronization, tracking, despreading, demodulation, work decoding, are useful capturing information, need in N paths
Carry out channel distribution.
Step 3.2: according to judging result in step 3.1, if you need to the capturing information progress to identifying while reaching with capture
Channel distribution, then find unoccupied channel, and the capturing information distribution stand in channel number for identifying while reaching with capture is maximum
Vacant channel in carry out subsequent processing, and the channel in the assignment channel occupies and is identified as 1, if all channels occupy, puts
Abandon the subsequent processing of this capturing information.
If the result in arrangement 3.1 is to need to carry out channel distribution to the capturing information with capture mark while arrival,
The channel for reading N paths occupies mark.If all channels occupy mark all 1, show that all channels are all occupied
With, can not handle with capture mark simultaneously arrival capturing information, abandon the subsequent processing of this capturing information.If there is channel accounts for
With being identified as 0, then the capturing information for identifying while reaching with capture is sent into the channel and carried out by the channel for taking largest passages to number
Processing will identify with capture while the capturing information reached is assigned to the capturing information in the channel for changing channel, starts subsequent
Processing, and enable the channel in the channel occupy and be identified as 1.
Step 4: to avoid the i-th paths from being blocked, at the end of decoding in occupied i-th paths or frame is same
When step mark is shown as unsuccessfully, enabling the i-th paths END instruction parallel_over_i is 1, and it is logical to discharge this by step 5
Road.
I-th paths cannot be occupied always, otherwise after the completion of the decoding of the i-th paths, can not handle new catch
Information is obtained, channel jam is caused.To avoid the i-th paths from being blocked, the logical of the i-th paths is updated by following two method
Road releases order, and the channel is released in step 5.Method one: after the completion of the decoding of the i-th paths, multi-user's treatment channel
New capturing information can be received at any time and carries out the frame synchronization of other users, tracking, despreading, demodulation, decoding, at this time assignment i-th
The channel end instruction parallel_over_i of paths is 1, and the channel is discharged in step 5.Method two: when the i-th tunnel
When channel frame sync identifications display frame synchronization fails, subsequent tracking can not be carried out at this time, de-spread, demodulation, work decoding, Ying Fang
This frame is abandoned, the processing to this user is terminated, the channel end instruction parallel_over_i of the i-th paths of assignment is 1, and
The channel is discharged in step 5, is preferably subsequent user service.So at the end of decoding in occupied i-th paths or
When person's frame sync identifications are shown as unsuccessfully, enabling the i-th paths END instruction parallel_over_i is 1, is discharged by step 5
This channel.
Step 5: when the channel end of the i-th paths instruction is 1, the i-th paths is discharged, the i-th paths are switched into energy
It is enough to receive the idle state for handling new capturing information.
The road N multi-user's treatment channel has the channel end instruction of oneself, as the i-th paths END instruction parallel_
When over_i is 1, the i-th paths are discharged, the channel of the i-th paths is occupied into mark, capturing information duplicate marking and channel and is tied
Shu Zhiling resets, and assignment index_max_cs_i is 0, and assignment index_max_out_i is 0, and assignment parallel_over_i is
0, and the capturing information index_max_out_i in the channel distributed in the i-th paths is reset, at this point, the i-th paths switch to sky
Not busy state can receive and handle new capturing information.
Step 6: step 1 is repeated to step 5, realizes that the multi-user of the capturing information based on Big Dipper short message system is logical
Road distribution, efficiently inerrably distributes the capturing information for multiple users that single trapping module captures into corresponding subscriber channel
In, for handling subsequent frame synchronization, tracking, despreading, demodulation, decoding function, by Step 2: channel capturing information in three
Duplicate marking realizes examination to the capturing information that may repeat in same frame, avoid waste frame synchronization, tracking, despreading,
Demodulation, decoding module resource, channel occupy the principle that mark is preferentially distributed using multi-user's channel number large size, guarantee channel point
The orderly progress matched, channel end instruction is so that subsequent processing channel switchs to idle state, raising frame synchronization, tracking, solution in time
Expand, demodulate, the utilization efficiency of decoding module.
Preferably, according to the signal system of Big Dipper short message, step 2.1, threshold value is preferably 3 described in 2.2.
The utility model has the advantages that
1, the multi-user channel distribution method of the capturing information disclosed by the invention based on Big Dipper short message system, in step
Channel capturing information duplicate marking is named and defined in two, by comparing with the capture mark capturing information of arrival and the simultaneously
Whether the phase difference of the capturing information in the channel of i paths reaches whether threshold decision capturing information repeats, and catches to channel
It obtains information duplicate marking and carries out assignment, realize the examination to the capturing information that may repeat in same frame, avoid waste frame
Synchronous, tracking, despreading, demodulation, decoding module resource.
2, the multi-user channel distribution method of the capturing information disclosed by the invention based on Big Dipper short message system, in step
In two name and define channel occupy mark, if channel is occupied, comparison with capture mark simultaneously reach capturing information and
Whether the capturing information in the channel in occupied channel repeats.If with capture mark simultaneously arrival capturing information with it is all occupied
It is not repeated with the capturing information in the channel in channel, and there are unappropriated channels, then carries out channel distribution in step 3,
And the principle that judgment method utilizes multi-user's channel number large size preferentially to distribute is provided, guarantee the orderly progress of channel distribution.
3, the multi-user channel distribution method of the capturing information disclosed by the invention based on Big Dipper short message system, to avoid
I-th paths are blocked, and by considering the normal termination situation that decoding is completed and the improper end situation that frame synchronization fails, give
The method of two kinds of release channels out, and then channel blockage is avoided, by channel end instruction so that subsequent processing channel turns in time
For idle state, improve frame synchronization, tracking, despreading, demodulation, decoding module utilization efficiency.
Detailed description of the invention
Fig. 1 is the flow diagram that the multi-user channel of the capturing information based on Big Dipper short message system is distributed；
Fig. 2 is the functional block diagram of the multi-user channel distribution method of the capturing information based on Big Dipper short message system.
Specific embodiment
Objects and advantages in order to better illustrate the present invention with reference to the accompanying drawing do further summary of the invention with example
Explanation.
Embodiment 1:
The present embodiment is analyzed by taking 15 tunnel multi-user channels as an example, transmitting terminal send 15 tunnel users, respectively marked as with
Family A1~user A15, for the phase difference of this 15 tunnel user in 1/2 chip or more, Doppler frequency is random.The distribution of multi-user channel
A total of 15 paths of module, respectively marked as channel T1~T15.In acquisition phase, since synchronous head length is actually required
Several times of length are captured, so trapping module can be captured several times in the synchronous head stage, and is to avoid false-alarm, often captures door
Limit can be higher, causes possibly can not all capture 15 users in single capture, but, institute mutually indepedent due to capturing every time
It can be to 99% or more in general acquisition probability, it is assumed that in this example, trapping module has carried out 3 times in the same synchronous head
Capture, captures user A1, A2, A4, A5, A9, A10, A11, A13 for the first time, captures user A2 in second of capture,
A4, A5, A6, A7, A8, A11, A12, A14 capture user A1, A3, A4, A5, A6, A8, A9, A10 in third time capture,
A11,A12,A13,A14,A15.It is now to handle 15 users of transmission.
As shown in Fig. 2, the multi-user channel distribution of the capturing information based on Big Dipper short message system disclosed in the present embodiment
Method includes the following steps:
Step 1: trapping module by capturing information and capture mark pass to multi-user's distribution module, and respectively name and
Define capturing information and capture mark.
Trapping module first can believe the capture of the user A1, A2, A4, A5, A9, A10, A11, A13 that capture for the first time
Breath is successively transmitted to channel distribution module.
Step 2: respectively 15 paths are named and is defined with respective channel and occupies mark, channel capturing information repetition mark
Know, occupy capturing information in channel, when capture, which is identified to, to be come, mark is occupied by the channel of the i-th paths and judges that the i-th tunnel is logical
The occupancy situation in road, if channel occupies, comparison is identified while being occupied in the capturing information and the i-th paths of arrival with capture and catches
Information is obtained to determine whether repeating, and according to judging result assignment the i-th paths capturing information duplicate marking, if channel does not account for
With then the i-th paths of assignment capturing information duplicate marking is 1.
Step 2.1: respectively 15 paths being named and defined with respective channel and occupies mark, channel capturing information repetition mark
Know, occupy capturing information in channel.
Whether the channel occupies identifies the frame synchronization referred in the i-th paths, tracking, despreading, demodulation, decoding just in work
The mark of work, the gap marker of the i-th paths of name are index_max_cs_i, in which: i=1 ... 15.If the i-th paths
In frame synchronization, tracking, despreading, demodulation, decoding module working, then the channel for defining the i-th paths occupies mark
Index_max_cs_i is 1, fixed if frame synchronization, tracking in the i-th paths, despreading, demodulation, decoding module do not work
It is 0 that the channel of adopted i-th paths, which occupies mark index_max_cs_i,.
The channel capturing information duplicate marking refers to that the capturing information handled in the i-th paths is identified with capture
The whether duplicate mark of capturing information reached simultaneously, the channel capturing information duplicate marking of the i-th paths of name are cmp_
State_i, in which: i=1 ... 15.If the capturing information that is being handled in the i-th paths and with the arrival simultaneously of capture mark
The phase difference of capturing information is greater than or equal to threshold value, shows that capturing information does not repeat, then defines the channel capture letter of the i-th paths
Ceasing duplicate marking cmp_state_i is 1, if phase difference is less than threshold value, shows that capturing information repeats, then defines the i-th paths
Channel capturing information duplicate marking cmp_state_i be 0.
Capturing information in the channel, which refers to, to be distributed by multi-user's distribution module into the capture handled in the i-th paths
Information, naming the capturing information in the channel of the i-th paths is index_max_out_i, in which: i=1 ... 15.
Step 2.2: when capture, which is identified to, to be come, mark being occupied by the channel of the i-th paths and judges accounting for for the i-th paths
With situation, if channel occupies, comparison identifies with capture while occupying capturing information in the capturing information and the i-th paths of arrival
To determine whether repeating, and assigned according to judging result assignment the i-th paths capturing information duplicate marking if channel is vacant
Value the i-th paths capturing information duplicate marking is 1.
When the capture of user A1 be identified to come when, 15 paths do not have all in idle state it is occupied, 15 paths
Channel occupies mark and is all 1, so the channel capturing information duplicate marking of 15 paths is all assigned a value of 1.
Step 3: by the channel capturing information duplicate marking of 15 paths, provide with capture mark simultaneously arrival catch
Obtain the result whether information needs to distribute.Unoccupied channel is found according to judging result, it will be with the arrival simultaneously of capture mark
Subsequent processing is carried out in the capturing information distribution the largest number of vacant channel of stand in channel, and the assignment channel occupies and is identified as 1,
If all channels occupy, the subsequent processing of this capturing information is abandoned.
Step 3.1: by the channel capturing information duplicate marking of 15 paths, provide with capture mark simultaneously arrival catch
Obtain the result whether information needs to distribute.
The channel capturing information duplicate marking all 1 of 15 paths, so the capturing information of the user A1 newly arrived does not have
It repeats, the capturing information to user A1 is needed to be allocated.
Step 3.2: according to judging result in step 3.1, if you need to the capturing information progress to identifying while reaching with capture
Channel distribution, then find unoccupied channel, and the capturing information distribution stand in channel number for identifying while reaching with capture is maximum
Vacant channel in carry out subsequent processing, and the channel in the assignment channel occupies and is identified as 1, if all channels occupy, puts
Abandon the subsequent processing of this capturing information.
Judging result in step 3.1 is that the capturing information to user A1 is needed to redistribute, and is found unoccupied
Channel, discovery channel T1~T15 is all unoccupied, according to the principle that channel number maximum is preferentially allocated, by user A1
Capturing information distribute to channel T15, and the channel of assignment channel T15 occupies and is identified as 1, and channel 15 begins preparing subsequent frame
Synchronous, tracking, despreading, demodulation, work decoding.
Step 4: respectively repeating steps two and step 3, distributes mould to multi-user channel is successively passed to by trapping module
The capturing information of user A2, A4, A5, A9, A10, A11, A13 that the first time of block captures are handled.Then there is following distribution
Mode: T14-A2, T13-A4, T12-A5, T11-A9, T10-A10, T9-A11, T8-A13, channel T14, T13, T12, T11,
T10, T9, T8 begin preparing subsequent frame synchronization, tracking, despreading, demodulation, work decoding.
Step 4: respectively repeating steps two and step 3, distributes mould to multi-user channel is successively passed to by trapping module
The user A2, A4, A5 that capture for the second time of block, A6, A7, A8, A11, A12, A14 are handled.It was found that wherein, A2, A4,
The capturing information of four tunnel users described in A5, A11 repeats, so the user only newly arrived to other five roads divides without distribution
Match, according to the preferential distribution principle of channel number large size, then has following allocation model: T7-A6, T6-A7, T5-A8, T4-A12, T3-
A14,5 paths begin preparing subsequent frame synchronization, tracking, despreading, demodulation, work decoding.
Step 5: respectively repeating steps two and step 3, distributes mould to multi-user channel is successively passed to by trapping module
The user A1, A3, A4 that the third time of block captures, A5, A6, A8, A9, A10, A11, A12, A13, A14, A15 are handled.Hair
Now wherein there was only user A3 and user A15 is new user, is allocated against two-way user, preferentially divides according to channel number large size
The principle matched then has following allocation model: T2-A3, T1-A15, this two paths begins preparing frame synchronization, tracking, despreading, solution
It adjusts, work decoding.
Step 6: in 15 paths, the frame sync identifications in certain paths show that this road user's frame synchronization fails
Or the decoding of certain paths terminates, then enabling channel end instruction is 1, for discharging this channel.
Step 7: when the channel end of certain paths instruction is 1, this channel is discharged, enables channel occupy and is identified as 0, enable
Channel capturing information duplicate marking is 1, and enabling channel end instruction is 0, resets the user's Doppler frequency and phase distributed in channel
Position information.The channel enters idle state, the capture letter for the other users that the subsequent captured module to be processed such as preparation is sent
Breath.
Step 8: step 1 is repeated to step 7, realizes that the multi-user of the capturing information based on Big Dipper short message system is logical
Road distribution, efficiently inerrably distributes the capturing information for multiple users that single trapping module captures into corresponding subscriber channel
In, for handling subsequent frame synchronization, tracking, despreading, demodulation, decoding function, by Step 2: channel capturing information in three
Duplicate marking realizes examination to the capturing information that may repeat in same frame, avoid waste frame synchronization, tracking, despreading,
Demodulation, decoding module resource, channel occupy the principle that mark is preferentially distributed using multi-user's channel number large size, guarantee channel point
The orderly progress matched, channel end instruction is so that subsequent processing channel switchs to idle state, raising frame synchronization, tracking, solution in time
Expand, demodulate, the utilization efficiency of decoding module.
Above-described specific descriptions have carried out further specifically the purpose of invention, technical scheme and beneficial effects
It is bright, it should be understood that the above is only a specific embodiment of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (7)
1. the multi-user channel distribution method of the capturing information based on Big Dipper short message system, it is characterised in that: including walking as follows
Suddenly,
Step 1: capturing information and capture mark are passed to multi-user's distribution module by trapping module, and are named and defined respectively
Capturing information and capture mark；
Step 2: respectively N paths are named and is defined with respective channel and occupies mark, channel capturing information duplicate marking, lead to
Capturing information is occupied in road, when capture, which is identified to, to be come, mark is occupied by the channel of the i-th paths and judges the i-th paths
Occupancy situation, if channel occupies, comparison identifies with capture while occupying capture letter in the capturing information and the i-th paths of arrival
Breath is to determine whether repeat, and according to judging result assignment the i-th paths capturing information duplicate marking, if channel is vacant,
Assignment the i-th paths capturing information duplicate marking is 1；
Step 3: it by the channel capturing information duplicate marking of N paths, provides with capturing information capture mark while reached
The result for whether needing to distribute；Unoccupied channel is found according to judging result, will be identified with capture while the capture reached is believed
Subsequent processing is carried out in the breath distribution the largest number of vacant channel of stand in channel, and the assignment channel occupies and is identified as 1, if all
Channel occupy, abandon the subsequent processing of this capturing information；
Step 4: for avoid the i-th paths be blocked, when in occupied i-th paths decode at the end of or frame synchronization mark
When knowledge is shown as unsuccessfully, enabling the i-th paths END instruction parallel_over_i is 1, discharges this channel by step 5；
Step 5: when the channel end of the i-th paths instruction is 1, the i-th paths is discharged, the i-th paths are switched to connect
Receive the idle state for handling new capturing information；
Step 6: step 1 is repeated to step 5, realizes the multi-user channel point of the capturing information based on Big Dipper short message system
Match, efficiently inerrably distribute the capturing information for multiple users that single trapping module captures into corresponding subscriber channel,
For handling subsequent frame synchronization, tracking, despreading, demodulation, decoding function, by Step 2: channel capturing information weight in three
Multiple mark realizes the examination to the capturing information that may repeat in same frame, avoids waste frame synchronization, tracking, despreading, solution
It adjusts, decoding module resource, channel occupies the principle that mark is preferentially distributed using multi-user's channel number large size, guarantees channel distribution
Orderly progress, channel end instruction so that subsequent processing channel switchs to idle state in time, improve frame synchronization, tracking, despreading,
It demodulates, the utilization efficiency of decoding module.
2. the multi-user channel distribution method of the capturing information as described in claim 1 based on Big Dipper short message system, special
Sign is: step 1 concrete methods of realizing is,
Capturing information and capture mark are passed to multi-user's distribution module by trapping module, and the capturing information includes Doppler's frequency
Rate and phase information are named as index_max_in, described to capture the useful id signal for being identified as capturing information, are named as
index_max_nd。
3. the multi-user channel distribution method of the capturing information as claimed in claim 2 based on Big Dipper short message system, special
Sign is: step 2 concrete methods of realizing is,
Step 2.1: respectively N paths being named and defined with respective channel and occupies mark, channel capturing information duplicate marking, lead to
Capturing information is occupied in road；
The channel occupies mark and refers to whether frame synchronization in the i-th paths, tracking, despreading, demodulation, decoding are working
Mark, the gap marker of the i-th paths of name are index_max_cs_i, in which: i=1 ... N；If the frame in the i-th paths
Synchronous, tracking, despreading, demodulation, decoding module are working, then the channel for defining the i-th paths occupies mark index_max_
Cs_i is 1, if frame synchronization, tracking in the i-th paths, despreading, demodulation, decoding module do not work, defines the i-th paths
Channel occupy mark index_max_cs_i be 0；
The channel capturing information duplicate marking refers to that the capturing information handled in the i-th paths identifies simultaneously with capture
The whether duplicate mark of the capturing information of arrival, the channel capturing information duplicate marking of the i-th paths of name are cmp_state_
I, in which: i=1 ... N；If the capturing information handled in the i-th paths and the capture letter for identifying while reaching with capture
The phase difference of breath is greater than or equal to threshold value, shows that capturing information does not repeat, then the channel capturing information for defining the i-th paths repeats
Identifying cmp_state_i is 1, if phase difference is less than threshold value, shows that capturing information repeats, then defines the channel of the i-th paths
Capturing information duplicate marking cmp_state_i is 0；
Capturing information in the channel, which refers to, to be distributed by multi-user's distribution module into the capture letter handled in the i-th paths
Breath, naming the capturing information in the channel of the i-th paths is index_max_out_i, in which: i=1 ... N；
Step 2.2: when capture, which is identified to, to be come, the occupancy feelings that mark judges the i-th paths being occupied by the channel of the i-th paths
Condition, if the i-th paths are occupied, by comparison with the logical of the capturing information and the i-th paths for capturing mark while reaching
Capturing information in road is to determine whether repeat, and according to judging result assignment the i-th paths capturing information duplicate marking；If
I-th paths are unoccupied, then the i-th paths of assignment capturing information duplicate marking is 1；
When capture mark index_max_nd arrives, the channel for reading N paths respectively occupies mark, when the channel on the i-th tunnel
When occupancy mark index_max_cs_i is 1, then show the capturing information index_ in the i-th paths just in treatment channel
max_out_i；Comparison is with the capturing information index_ in the channel of capture identifies while reaching capturing information and the i-th paths
Whether the phase difference of max_out_i reaches whether threshold decision capturing information repeats；If being identified with capture while what is reached catching
The capturing information obtained in the channel of information and the i-th paths repeats, then the channel capturing information duplicate marking cmp_ on the i-th tunnel of assignment
State_i is 0；If do not repeated, the channel capturing information duplicate marking cmp_state_i on the i-th tunnel of assignment is 1；If the i-th tunnel
When to occupy mark index_max_cs_i be 0 in channel, then the channel capturing information duplicate marking cmp_state_ on the i-th tunnel of assignment
I is 1.
4. the multi-user channel distribution method of the capturing information as claimed in claim 3 based on Big Dipper short message system, special
Sign is: step 3 concrete methods of realizing is,
Step 3.1: by the channel capturing information duplicate marking of N paths, providing the capture letter with capture mark while arrival
The result whether breath needs to distribute；
By the channel capturing information duplicate marking of N paths, obtain whether needing with the capturing information of capture mark while arrival
The result to be distributed；Judgment method are as follows: if it is not 1 that the channel capturing information duplicate marking of N paths, which has one, show with
Capture identifies while the capturing information reached is carrying out subsequent frame synchronization, tracking, despreading, demodulation, work decoding, no longer exists
Channel distribution is carried out in N paths；If all 1, would show with capture mark while the capturing information of arrival is logical not on the road N
Road carries out subsequent frame synchronization, tracking, despreading, demodulation, work decoding, is useful capturing information, needs to carry out in N paths
Channel distribution；
Step 3.2: according to judging result in step 3.1, if you need to the capturing information progress channel for identifying while reaching with capture
Distribution, then find unoccupied channel, and the capturing information distribution stand in channel for identifying while reaching with capture is the largest number of not
Subsequent processing is carried out in active channel, and the channel in the assignment channel occupies and is identified as 1, if all channels occupy, abandons this
The subsequent processing of capturing information；
If the result in arrangement 3.1 is to need to carry out channel distribution to the capturing information with capture mark while arrival, N is read
The channel of paths occupies mark；If all channels occupy mark all 1, show that all channels are all occupied, nothing
The capturing information that method processing is identified while being reached with capture, abandons the subsequent processing of this capturing information；It is marked if there is channel occupies
Knowing is 0, then the channel for taking largest passages to number, and will identify with capture while the capturing information reached is sent at the channel
Reason will identify with capture while the capturing information reached is assigned to the capturing information in the channel for changing channel, starts subsequent place
Reason, and enable the channel in the channel occupy and be identified as 1.
5. the multi-user channel distribution method of the capturing information as claimed in claim 4 based on Big Dipper short message system, special
Sign is: step 4 concrete methods of realizing is,
I-th paths cannot be occupied always, otherwise after the completion of the decoding of the i-th paths, can not handle new capture letter
Breath, leads to channel jam；To avoid the i-th paths from being blocked, released by the channel that following two method updates the i-th paths
Instruction is put, and releases the channel in step 5；Method one: after the completion of the decoding of the i-th paths, multi-user's treatment channel can be with
New capturing information is received at any time and carries out the frame synchronization of other users, tracking, despreading, demodulation, decoding, and the i-th tunnel of assignment is logical at this time
The channel end instruction parallel_over_i in road is 1, and the channel is discharged in step 5；Method two: when the i-th paths
When frame sync identifications display frame synchronization fails, subsequent tracking can not be carried out at this time, is de-spread, and demodulation, work decoding should abandon this
Frame terminates the processing to this user, and the channel end instruction parallel_over_i of the i-th paths of assignment is 1, and in step
The channel is discharged in five, is preferably subsequent user service；So at the end of decoding in occupied i-th paths or frame
When sync id is shown as unsuccessfully, enabling the i-th paths END instruction parallel_over_i is 1, and it is logical to discharge this by step 5
Road.
6. the multi-user channel distribution method of the capturing information as claimed in claim 5 based on Big Dipper short message system, special
Sign is: step 5 concrete methods of realizing is,
The road N multi-user's treatment channel has the channel end instruction of oneself, as the i-th paths END instruction parallel_over_
When i is 1, the i-th paths are discharged, the channel of the i-th paths is occupied into mark, capturing information duplicate marking and channel end and is instructed
It resets, assignment index_max_cs_i is 0, and assignment index_max_out_i is 0, and assignment parallel_over_i is 0, and clear
The capturing information index_max_out_i in channel distributed in 0 i-th paths, at this point, the i-th paths switch to idle shape
State can receive and handle new capturing information.
7. the multi-user channel distribution method of the capturing information as claimed in claim 6 based on Big Dipper short message system, special
Sign is: according to the signal system of Big Dipper short message, step 2.1, threshold value is preferably 3 described in 2.2.
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