CN104155661B - The control method of a kind of GNSS receiver, device and system - Google Patents
The control method of a kind of GNSS receiver, device and system Download PDFInfo
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- CN104155661B CN104155661B CN201310180341.7A CN201310180341A CN104155661B CN 104155661 B CN104155661 B CN 104155661B CN 201310180341 A CN201310180341 A CN 201310180341A CN 104155661 B CN104155661 B CN 104155661B
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 239000000872 buffer Substances 0.000 claims abstract description 63
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- 230000010354 integration Effects 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 5
- 230000001427 coherent effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002085 persistent effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000013479 data entry Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
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- Radar, Positioning & Navigation (AREA)
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- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
The invention discloses the control method of a kind of GNSS receiver, device and system, described method includes: arrange higher limit TH of buffer data size and lower limit TL in relief area；If buffer data size is less than described lower limit in current time relief area, or by rising between described higher limit and described lower limit less than described lower limit, close each tracking channel until buffer data size is more than described higher limit.Use technical scheme, it is ensured that when buffer cache data volume is less, tracking channel is closed, save power consumption.
Description
Technical field
The present invention relates to signal processing technology field, particularly relate to the control method of a kind of GNSS receiver, device with
System.
Background technology
GNSS(Global Navigation Satellite System, GLONASS) be refer to all of
Satellite navigation system, including the whole world, region and enhancing.The GPS of the such as U.S., Muscovite Glonass, Europe
Galileo, the Beidou satellite navigation system of China；Relevant enhancing system has the WAAS(WAAS of the U.S.), Europe
EGNOS(Europe geostationary Navigation Overlay System) and Japan MSAS(Multi-functional transporting Satellite Augmentation System) etc.；It addition, GNSS
It is also contemplated by building and other satellite navigation systems to be built.
GNSS receiver (including the GPS of the U.S., the Big Dipper of China and the Galileo in Europe) is believed by receiving multi-satellite
Number calculate receiver position.Receiver is commonly equipped with multiple independent and identical tracking channel, in whole use process
In each passage persistently follow the tracks of different satellite-signals.The structure chart of common tracking channel as it is shown in figure 1, wherein arrow represent letter
Number flow to, in figure, vertical dotted line left-hand component is tracking channel, typically with specialized hardware realization, pending signal is divided by relief area
Dispensing tracking channel, first tracking channel carries out Frequency mixing processing to signal, it is achieved go the purpose of carrier wave；Then relevant treatment is passed through
Carry out pseudo-code；Integration/removing module exports the coherent integration value of 1 millisecond, and each millisecond exports once, carrier wave ring descriminator root
Calculate frequency difference and the phase contrast of carrier wave according to described coherent integration value, carrier generator is according to the carrier beat calculated and phase place
Difference adjusts the local carrier produced；Code ring descriminator calculates frequency difference and the phase contrast of pseudo-code according to described coherent integration value, passes through
After Loop filter processes, control code generator adjusts the pseudo-code produced.
Wherein, the functional module on the right of dotted line is general then with the software realization run in microprocessor.Connect at some GNSS
In receipts machine, microprocessor can be the microprocessor shared with other functions in receiver.Same receiver include multiple with
Track passage, these tracking channels typically share same microprocessor, and specialized hardware part is then the most independent.Multiple tracking are led to
Road is referred to shown in Fig. 2 with the relation of microprocessor, and Fig. 2 is the structural representation of multiple tracking channel and microprocessor.
Summary of the invention
Inventor it has been investigated that, from integration/removing module output coherent integration value to carrier generator and code generator
During being adjusted to subsequent work state, frequency mixing module, correlation module and integration/removing module time-out process intermediate-freuqncy signal data,
Now the intermediate-freuqncy signal data of outside input are kept in the buffer, therefore frequency mixing module, correlation module and integration/removing
The data processing speed of module must be faster than the input speed of intermediate-freuqncy signal data.The generally data processing speed of these modules
The input speed of intermediate-freuqncy signal data to be significantly faster than that, to ensure that relief area is overflowed never, therefore relief area must have one
The section time is in complete empty state.From this angle analysis, above-mentioned several modules are in the most for some time does not has the data can
The idle condition processed, wastes certain power consumption.
To this end, the present invention provides the control method of a kind of GNSS receiver, device and system, to solve in prior art,
Because tracking channel is in the technical problem of the power wastage that idle condition causes, reduce the power consumption of tracking channel.
For solving above-mentioned technical problem, the present invention provides the control method of a kind of GNSS receiver, device and system, this
The following technical scheme of bright offer:
A kind of control method of GNSS receiver, the method includes:
Higher limit TH of buffer data size and lower limit TL in relief area are set；
If in current time relief area, buffer data size is less than described lower limit, or is risen by less than described lower limit
To between described higher limit and described lower limit, close each tracking channel until buffer data size is more than the described upper limit
Value.
Preferably, the setting of described higher limit TH includes:
The write duration T 1 of each data of speed calculation according to relief area write data；
Calculate tracking channel generation integration/removing result to carrier generator and code generator all exports between ready signal
Maximum duration T2；
Described higher limit TH is set to Nmax-Round (T2/T1) 1, and wherein said Round represents rounding operation, Nmax
The maximum amount of data that can accommodate for described relief area.
Preferably, arbitrary nonnegative integer that described lower limit TL is set in [0, TH-1].
Preferably, described method also includes:
If in current time relief area, buffer data size is more than described higher limit, or is declined by more than described higher limit
To between described higher limit and described lower limit, open each tracking channel, until buffer data size is less than described lower limit
Value.
Preferably, described method also includes:
In current time relief area, buffer data size is less than described lower limit, or is risen to by less than described lower limit
Between described higher limit and described lower limit, close microprocessor, until buffer data size is more than described higher limit.
The present invention also provides for the control device of a kind of GNSS receiver, and described device includes:
Limit value arranges module, for arranging higher limit TH of buffer data size and lower limit TL in relief area；
Closing control module, in current time relief area, buffer data size is less than described lower limit, or by little
When described lower limit rises between described higher limit and described lower limit, close each tracking channel until caching number
According to amount more than described higher limit.
Preferably, described limit value arranges module and includes: higher limit arranges submodule, is used for arranging buffer cache data volume
Higher limit, described higher limit is Nmax-Round (T2/T1) 1；Wherein said Round represents rounding operation, and Nmax is described
The maximum amount of data that relief area can accommodate, T1 is writing of each data of the input speed calculation according to relief area write data
Enter the persistent period；T2 is that tracking channel produces integration/removing result to carrier generator and code generator all exports ready signal
Between maximum duration；
Lower limit arranges submodule, for arranging the lower limit of buffer cache data volume, described lower limit be set to [0,
TH-1] in arbitrary nonnegative integer.
Preferably, described device also includes:
Opening control module, in current time relief area, buffer data size is more than described higher limit, or by greatly
Drop between described higher limit and described lower limit in described higher limit, open each tracking channel, until caching number
According to amount less than described lower limit.
Preferably, described device also includes:
Microprocessor cuts out module, and in current time relief area, buffer data size is less than described lower limit, or
By when rising between described higher limit and described lower limit less than described lower limit, close microprocessor, until caching
Data volume is more than described higher limit.
The present invention also provides for the control system of a kind of GNSS receiver, and described system includes: any of the above-described described control
Device and GNSS receiver.
In technical scheme, the higher limit of data cached capacity and lower limit for setting buffers, in buffering
When data cached capacity is less than described lower limit in district, closes each tracking channel, make tracking channel be in not running status；This
Time, if buffer cache data capacity increases, but after being to increase between described higher limit and described lower limit, then continue
Keep the closed mode of tracking channel.Because the speed that tracking channel processes data is wanted than the speed of relief area write data
Hurry up, so, in order to avoid occurring that relief area does not has data, and cause tracking channel not have data to process also in running status band
Come power wastage, when in relief area data cached less time, tracking channel can be closed, when data accumulate certain data volume
After, it is then turned on tracking channel and carries out data process, reduce and cause owing to tracking channel is idle during to Satellite Tracking
Power wastage.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of tracking channel；
Fig. 2 is the structural representation of multiple tracking channel and microprocessor；
Fig. 3 is the flow chart of the control method embodiment 1 of a kind of GNSS receiver of the present invention；
Fig. 4 is the flow chart of the control method embodiment 2 of a kind of GNSS receiver of the present invention；
Fig. 5 is the structural representation controlling device of a kind of GNSS receiver of the present invention；
Fig. 6 is the structural representation that limit value of the present invention arranges module；
Fig. 7 is the structural representation controlling device embodiment 2 of a kind of GNSS receiver of the present invention；
Fig. 8 is the structural representation of the control system embodiment 1 of a kind of GNSS receiver of the present invention；
Fig. 9 is the structural representation of the technical solution of the present invention a kind of receiver corresponding when actual realization；
Figure 10 is the signal flow diagram of a kind of embodiment applying technical solution of the present invention.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only this
Invent a part of embodiment rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art exist
Do not make the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
On the basis of Fig. 1 and Fig. 2, with reference to shown in Fig. 3, for the control method of a kind of GNSS receiver that the present invention provides
The flow chart of embodiment 1, the present embodiment specifically may include that
Step 301: higher limit and the lower limit of buffer data size in relief area are set.
The data received in GNSS receiver all write in relief area temporary, and each data in relief area will be through each
Tracking channel individual processing is once.Loss of data and tracking channel is caused to be in idle shape because relief area to be ensured will not be overflowed
The power wastage problem that state is brought, in relief area described here, to be different from described relief area permissible for the higher limit of buffer data size
Data cached maximum, described relief area can using the maximum of buffer data size can as obtain buffer cache data volume
One parameter of higher limit.
Concrete, note higher limit is TH, then, described higher limit TH can be calculated by following formula:
Nmax-Round(T2/T1)–1；
Wherein said Round represents rounding operation, and Nmax is the maximum that described relief area can be data cached, T1 be to
During the write data of relief area, the persistent period of each data, T2 is that tracking channel produces integration/removing result to carrier generator
With code generator all exports the maximum duration between ready signal, described carrier generator and code generator all export ready signal
For indication carrier wave generator and code generator, the phase place of carrier wave and pseudo-code and frequency are adjusted to the signal of NextState.Lift individual
Example, it is assumed that intermediate-freuqncy signal speed of data entry is 16368000 per second, then, duration T 1=1/ of each data
16368000 seconds.Assume that integration/remover output coherent integration value all produces ready signal to carrier generator and code generator
The maximum duration T2=100/16368000 second, data volume Nmax=1024 that the relief area maximum of tracking channel can preserve.According to
It is 923 that above-mentioned parameter can calculate the higher limit of buffer cache data volume, generally remaining plus certain safety in Project Realization
Amount, also has certain error on measuring and calculating, so can be on the basis of the higher limit calculated in practical operation
Upper suitably reduce, such as, be 923 to reduce to 900 by higher limit.
Wherein, described T2 can be understood as in a data handling procedure, is sent out to carrier wave by integration/removing resume module is complete
Raw device and code generator all export the time used by ready signal, in practical operation, the method for statistics can be used to obtain.Ratio
As, use the mode of timer, when each tracking channel processes data in record a period of time, by integration/removing module every time
Process carrier generator and code generator has all exported the time used by ready signal, from the time of all tracking channel records
In to select the longest time be exactly T2.
Accordingly, remembering that described lower limit is TL, the span of described lower limit TL is [0, TH-1].Preferably, described
Lower limit can be taken as 0, because lower limit is closer to several moulds such as higher limit, the mixing in tracking channel, relevant, integration/removings
The opening and closing of block are the most frequent, can affect the effect reducing power consumption.
Step 302: if buffer data size is less than described lower limit in current time relief area, or by less than under described
Limit value rises between described higher limit and described lower limit, closes each tracking channel until buffer data size is more than institute
State higher limit.
Relief area not only inputs data at every moment, and the data that tracking channel has processed simultaneously also will be from relief area
Delete, if buffer data size is less than the lower limit arranged in current time relief area, illustrate that in relief area, data are less, as
Fruit starts tracking channel and processes data, may result in relief area and the phenomenon of no data occurs.Now, equal at each tracking channel
When not having data to process, close tracking channel.Tracking channel does not process data, so data can be increasingly in relief area
Many, but, as long as still between described higher limit and described lower limit after in relief area, data capacity rises, can keep
The closed mode of tracking channel.After capacity data cached in relief area exceedes higher limit, it is then turned on tracking channel and processes data.
In the technical scheme of the present embodiment, the higher limit of buffer data size and lower limit for setting buffers, in buffering
When data cached capacity is less than described lower limit in district, closes each tracking channel, make tracking channel be in not running status；This
Time, if buffer cache data volume increases, but after being to increase between described higher limit and described lower limit, continue to keep
The closed mode of tracking channel.In the present embodiment, in relief area data cached less time, tracking channel can be closed, work as accumulation
After certain data volume, it is then turned on tracking channel and carries out data process.Because the speed ratio that tracking channel processes data is slow
The speed rushing district's write data wants fast, so, the control strategy by the tracking channel in the technical scheme of the present embodiment is permissible
Avoid the occurrence of relief area and there is no data, and cause tracking channel not have data to process the power consumption wave brought also in running status
Take, reduce power wastage that is idle due to tracking channel during to Satellite Tracking and that cause.
The technical scheme of above-described embodiment 1 solves because the technical problem of power wastage brought of tracking channel free time,
But from the workflow of tracking channel, when in relief area data cached less time, tracking channel is closed, now, micro-
Processor does not has data to process yet, and microprocessor is still within running status, will also result in power consumption the most to a certain extent
Waste.To this end, the present invention also provides for the control method embodiment 2 of a kind of GNSS receiver, with reference to shown in Fig. 4, carry for the present invention
A kind of flow chart of the control method embodiment 2 of the GNSS receiver of confession, the tool of step in the same manner as in Example 1 in the present embodiment
Body realizes the implementation being referred in embodiment 1, and it does not remake in the present embodiment concrete introduction.The present embodiment can be seen
Work is one on the basis of embodiment 1 and implements, and solves the power wastage having microprocessor to bring further.The present embodiment
Specifically may include that
Step 401: higher limit and the lower limit of buffer data size in relief area are set；
Step 402: if buffer data size is less than described lower limit in current time relief area, or by less than under described
Limit value rises between described higher limit and described lower limit, closes each tracking channel until buffer data size is more than institute
State higher limit.
Step 403: close microprocessor, until buffer data size is more than described higher limit.
When in relief area, data are less, each tracking channel does not all have data to process, in microprocessor now yet
Do not have data pending, if continue keep microprocessor running status, the most also can waste power consumption, so, close with
While track passage, it is also possible to close microprocessor.Described cut out microprocessor can be that the carrier wave ring realized for software differentiates
Device, code ring descriminator, carrier wave ring wave filter and Loop filter are closed.
Step 404: if buffer data size is more than described higher limit in current time relief area, or by more than on described
Limit value drops between described higher limit and described lower limit, opens each tracking channel, until buffer data size is less than
Described lower limit.
If buffer data size is more than higher limit in relief area, now will open tracking channel and carry out data process, with
Exempt from relief area because overflowing and causing loss of data.After tracking channel is opened, meanwhile, microprocessor also to be opened and carry out at data
Reason.Data are also written into relief area continuing, and lead to so tracking can not be closed at buffer area data volume less than higher limit the most immediately
The data in road process.If closed immediately, tracking channel does not process data, may result in tracking channel and just closes, relief area
The data volume of middle caching is again beyond the situation of higher limit, and in order to avoid opening and closing tracking channel frequently, impact reduces merit
The effect of consumption.Preferably, in practical operation, the opening of tracking channel can be kept until buffer area data volume drops to
Less than lower limit.
The technical scheme of the present embodiment, in addition to the beneficial effect that embodiment 1 is brought, further, at tracking channel
While closedown, close microprocessor, reduce further power consumption.When buffer data is dropped to less than upper by more than higher limit
During limit value, closing tracking channel the most immediately, it is to avoid open and close tracking channel frequently, impact reduces the effect of power consumption.
Corresponding to embodiment of the method, accordingly, the present invention also provides for the control device of a kind of GNSS receiver, with reference to Fig. 5
Shown in, for the structural representation controlling device embodiment 1 of a kind of GNSS receiver that the present invention provides, described device includes:
Limit value arranges module 501, for arranging higher limit TH of buffer data size and lower limit TL in relief area；
Closing control module 502, in current time relief area, buffer data size is less than described lower limit, or by
When rising between described higher limit and described lower limit less than described lower limit, close each tracking channel until caching
Data volume is more than described higher limit.
Wherein, limit value arranges the structural representation of module 501 and is referred to shown in Fig. 6, and shown limit value arranges module 501 can
To include:
Higher limit arranges submodule 601, and for arranging the higher limit of buffer cache data volume, described higher limit is
Nmax-Round(T2/T1)–1；Wherein said Round represents rounding operation, and Nmax is the maximum that described relief area can accommodate
Data volume, T1 is the write persistent period of each data of the input speed calculation according to relief area write data；T2 is for following the tracks of
Passage produces integration/removing result to carrier generator and code generator all exports the maximum duration between ready signal；
Lower limit arranges submodule, for arranging the lower limit of buffer cache data volume, described lower limit be set to [0,
TH-1] in arbitrary nonnegative integer.
The function that in device, each module is realized is corresponding with method operating procedure in embodiment of the method 1, repeats no more here.
Preferably, with reference to shown in Fig. 7, for the knot controlling device embodiment 2 of a kind of GNSS receiver that the present invention provides
Structure schematic diagram, in addition to the module shown in Fig. 5, described device can also include:
Opening control module 701, in current time relief area, buffer data size is more than described higher limit, or by
Drop between described higher limit and described lower limit more than described higher limit, open each tracking channel, until caching
Data volume is less than described lower limit.
Microprocessor cuts out module 702, and in current time relief area, buffer data size is less than described lower limit, or
It is by when rising between described higher limit and described lower limit less than described lower limit, closes microprocessor.
Preferably, with reference to shown in Fig. 8, the knot of the control system embodiment 1 of a kind of GNSS receiver provided for the present invention
Structure schematic diagram, described system may include that control device 801 and the GNSS receiver 802 of GNSS receiver.Described GNSS receives
The device 801 that controls of machine is the control device shown in the arbitrary figure of described Fig. 5 to Fig. 7.
Preferably, with reference to shown in Fig. 9, for a kind of structural representation that technical scheme is corresponding when actual realization
By GNSS receiver, figure, includes that, as a example by 12 tracking channels, wherein power consumption control module is described in above several embodiment
Control device, power consumption control module controls microprocessor and the duty of each tracking channel respectively.
Concrete is referred to shown in Figure 10, for a kind of signal that a kind of embodiment using technical solution of the present invention is corresponding
Flow graph, power consumption control module obtains in relief area the data volume of caching in real time, then according to the data volume of caching and higher limit and
The magnitude relationship of lower limit, sends control signal to tracking channel and microprocessor.Wherein integration/removing module status represents long-pending
Partite transport is complete, and each module control signal is for controlling mixing, relevant, code generator and the unlatching of carrier generator and pass
Closing, described mixing, relevant, code generator and carrier generator can use same control signal, are turned on and off simultaneously.Institute
State carrier generator and the ready signal of code generator and integration/removing module status signal be all sent to power consumption control module,
Represent that code generator and carrier wave occur when power consumption control module receives the ready signal of described carrier generator and code generator
Carrier wave and the frequency of pseudo-code have been adjusted to carrier wave corresponding when next data processes and pseudo-code by device with phase place.Now, merit
Consumption control module is just it is believed that current data the most processed (having been processed by all tracking channels).Now, buffer block deletion
Processed data, and up-to-date data volume is sent to power consumption control module, power consumption control module control follow-up letter
Number process.In practical operation, tracking channel or the unlatching of microprocessor and pass can be controlled in the way of using high and low level
Close.
It should be noted that term " includes ", " comprising " or its any other variant are intended to the bag of nonexcludability
Contain, so that include that the process of a series of key element, method, article or equipment not only include those key elements, but also include
Other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.
In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that including described key element
Process, method, article or equipment in there is also other identical element.
For system embodiment, owing to it corresponds essentially to embodiment of the method, so relevant part sees method in fact
The part executing example illustrates.System embodiment described above is only schematically, wherein said as separating component
The unit illustrated can be or may not be physically separate, and the parts shown as unit can be or can also
It not physical location, i.e. may be located at a place, or can also be distributed on multiple NE.Can be according to reality
Need to select some or all of module therein to realize the purpose of the present embodiment scheme.Those of ordinary skill in the art are not
In the case of paying creative work, i.e. it is appreciated that and implements.
The above is only the detailed description of the invention of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. the control method of a GNSS receiver, it is characterised in that described method includes:
Higher limit TH of buffer data size and lower limit TL in relief area are set；
If in current time relief area, buffer data size is less than described lower limit, or is risen to be situated between by less than described lower limit
Between described higher limit and described lower limit, close each tracking channel until buffer data size is more than described higher limit；
The setting of described higher limit TH includes:
The write duration T 1 of each data of speed calculation according to relief area write data；
Calculate and all export ready signal from tracking channel generation integration/removing result to carrier generator and code generator
Maximum duration T2；
Described higher limit TH is set to Nmax-Round (T2/T1) 1, and wherein said Round represents rounding operation, and Nmax is institute
State the maximum amount of data that relief area can accommodate.
Method the most according to claim 1, it is characterised in that it is arbitrary non-that described lower limit TL is set in [0, TH-1]
Negative integer.
Method the most according to claim 1, it is characterised in that described method also includes:
If in current time relief area, buffer data size is more than described higher limit, or is dropped to Jie by more than described higher limit
Between described higher limit and described lower limit, open each tracking channel, until buffer data size is less than described lower limit.
Method the most according to claim 1, it is characterised in that described method also includes:
In current time relief area buffer data size be less than described lower limit, or by less than described lower limit rise between
Between described higher limit and described lower limit, close microprocessor, until buffer data size is more than described higher limit.
5. the control device of a GNSS receiver, it is characterised in that described device includes:
Limit value arranges module, for arranging higher limit TH of buffer data size and lower limit TL in relief area；
Closing control module, in current time relief area, buffer data size is less than described lower limit, or by less than institute
State lower limit when rising between described higher limit and described lower limit, close each tracking channel until buffer data size
More than described higher limit；
Described limit value arranges module and includes: higher limit arranges submodule, for arranging the higher limit of buffer cache data volume, institute
Stating higher limit is Nmax-Round (T2/T1) 1；Wherein said Round represents rounding operation, and Nmax is that described relief area can
The maximum amount of data accommodated, T1 be each data of the input speed calculation according to relief area write data write persistently time
Between；T2 is that tracking channel produces integration/removing result to carrier generator and code generator and all exports between ready signal
For a long time；
Lower limit arranges submodule, and for arranging the lower limit of buffer cache data volume, described lower limit is set to [0, TH-
1] the arbitrary nonnegative integer in.
Device the most according to claim 5, it is characterised in that described device also includes:
Opening control module, in current time relief area, buffer data size is more than described higher limit, or by more than institute
State higher limit to drop between described higher limit and described lower limit, open each tracking channel, until buffer data size
Less than described lower limit.
Device the most according to claim 5, it is characterised in that described device also includes:
Microprocessor cuts out module, and in current time relief area, buffer data size is less than described lower limit, or by little
When described lower limit rises between described higher limit and described lower limit, close microprocessor, until data cached
Amount is more than described higher limit.
8. the control system of a GNSS receiver, it is characterised in that described system includes:
Control device described in described any one of claim 5-7 and GNSS receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310180341.7A CN104155661B (en) | 2013-05-15 | 2013-05-15 | The control method of a kind of GNSS receiver, device and system |
Applications Claiming Priority (1)
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