CN104155661A - Control method, apparatus and system for GNSS receiver - Google Patents
Control method, apparatus and system for GNSS receiver Download PDFInfo
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- CN104155661A CN104155661A CN201310180341.7A CN201310180341A CN104155661A CN 104155661 A CN104155661 A CN 104155661A CN 201310180341 A CN201310180341 A CN 201310180341A CN 104155661 A CN104155661 A CN 104155661A
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- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
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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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Abstract
The invention discloses a control method, apparatus and system for a GNSS receiver. The method comprises: arranging an upper limit value TH and a lower limit value TL of a buffer memory data size in a buffer area; and if the buffer memory data size in the buffer area is smaller than the lower limit value at the current moment or is increased from being smaller than the lower limit value to between the upper limit value and the lower limit value, closing each tracking channel until the buffer memory data size is greater than the upper limit value. By adopting the technical scheme provided by the invention, it can be ensured that when the buffer memory data size in the buffer area is quite small, the tracking channel is at a closing state, such that power consumption is reduced.
Description
Technical field
The present invention relates to signal processing technology field, particularly relate to a kind of control method, equipment and system of GNSS receiver.
Background technology
GNSS(Global Navigation Satellite System, GLONASS (Global Navigation Satellite System)) be all satellite navigation systems of general reference, comprise the whole world, region with strengthen.The Galileo in the GPS of for example U.S., Muscovite Glonass, Europe, the Beidou satellite navigation system of China; Relevant enhancing system has the WAAS(Wide Area Augmentation System of the U.S.), EGNOS(Europe in Europe overlapping system that navigates quietly) and Japanese MSAS(Multi-functional transporting satellite enhancing system) etc.; In addition, GNSS is also encompassed in other satellite navigation systems of building and will build later.
GNSS receiver (comprising GPS, the Big Dipper of China and the Galileo in Europe of the U.S.) goes out receiver position by receiving multi-satellite calculated signals.General multiple independent and identical tracking channels, the different satellite-signal of the lasting tracking of each passage in whole use procedure of being equipped with of receiver.The structural drawing of common tracking channel as shown in Figure 1, wherein arrow represents that signal flows to, in figure, vertically dotted line left-hand component is tracking channel, generally realize with specialized hardware, pending signal is distributed to tracking channel by buffer zone, first tracking channel carries out Frequency mixing processing to signal, realizes the object of unloading ripple; Then go pseudo-code by relevant treatment; The coherent integration value that the output of integration/removing module is 1 millisecond, each millisecond output once, carrier wave ring Discr. calculates frequency difference and the phase differential of carrier wave according to described coherent integration value, carrier generator is according to the local carrier of the carrier beat calculating and adjusting offset generation; Code ring Discr. calculates frequency difference and the phase differential of pseudo-code, the pseudo-code that the adjustment of control code generator produces after Loop filter is processed according to described coherent integration value.
Wherein, the functional module on dotted line the right is general realizes with the software moving in microprocessor.In some GNSS receiver, microprocessor can be with receiver in the microprocessor of other function sharings.Same receiver comprises multiple tracking channels, and these tracking channels are generally shared same microprocessor, and specialized hardware part is independent separately.The relation of multiple tracking channels and microprocessor can be with reference to shown in figure 2, and Fig. 2 is the structural representation of multiple tracking channels and microprocessor.
Summary of the invention
Inventor finds after deliberation, from integration/removing module output coherent integration value to carrier generator with during code generator adjusts to next duty, frequency mixing module, correlation module and integration/removing module are suspended processing intermediate-freuqncy signal data, now the intermediate-freuqncy signal data of outside input are kept in buffer zone, and therefore the data processing speed of frequency mixing module, correlation module and integration/removing module must be faster than the input speed of intermediate-freuqncy signal data.Conventionally the data processing speed of these modules is wanted the obviously input speed faster than intermediate-freuqncy signal data, to ensure that buffer zone overflows never, the therefore buffer zone state in full sky for some time.From this angle analysis, above-mentioned several modules necessarily, for some time in there is no the accessible idle condition of data, have been wasted certain power consumption.
For this reason, the invention provides a kind of control method, equipment and system of GNSS receiver, to solve in prior art, the technical matters of the power wastage causing in idle condition because of tracking channel, reduces the power consumption of tracking channel.
For solving the problems of the technologies described above, the invention provides a kind of control method, equipment and system of GNSS receiver, the invention provides following technical scheme:
A control method for GNSS receiver, the method comprises:
Higher limit TH and the lower limit TL of buffer data size in buffer zone are set;
If buffer data size is less than described lower limit in current time buffer zone, or rise between described higher limit and described lower limit by being less than described lower limit, close each tracking channel until buffer data size is greater than described higher limit.
Preferably, the setting of described higher limit TH comprises:
That calculates each data according to the speed of buffer zone data writing writes duration T 1;
Calculate tracking channel generation integration/removing result and all export the maximum duration T2 between ready signal to carrier generator and code generator;
Described higher limit TH be set to Nmax-Round (T2/T1) – 1, wherein said Round represents rounding operation, Nmax is the maximum amount of data that described buffer zone can hold.
Preferably, described lower limit TL is set to the arbitrary nonnegative integer in [0, TH-1].
Preferably, described method also comprises:
If buffer data size is greater than described higher limit in current time buffer zone, or drop between described higher limit and described lower limit by being greater than described higher limit, open each tracking channel, until buffer data size is less than described lower limit.
Preferably, described method also comprises:
In current time buffer zone, buffer data size is less than described lower limit, or rises between described higher limit and described lower limit by being less than described lower limit, closes microprocessor, until buffer data size is greater than described higher limit.
The present invention also provides a kind of control device of GNSS receiver, and described device comprises:
Limit value arranges module, for higher limit TH and the lower limit TL of buffer zone buffer data size are set;
Closing control module, be less than described lower limit for current time buffer zone buffer data size, or when being less than described lower limit and rising between described higher limit and described lower limit, close each tracking channel until buffer data size is greater than described higher limit.
Preferably, described limit value arranges module and comprises: higher limit arranges submodule, and for the higher limit of buffer cache data volume is set, described higher limit is Nmax-Round (T2/T1) – 1; Wherein said Round represents rounding operation, and Nmax is the maximum amount of data that described buffer zone can hold, and T1 is the duration that writes according to each data of the input speed calculating of buffer zone data writing; T2 is that tracking channel generation integration/removing result is all exported the maximum duration between ready signal to carrier generator and code generator;
Lower limit arranges submodule, and for the lower limit of buffer cache data volume is set, described lower limit is set to the arbitrary nonnegative integer in [0, TH-1].
Preferably, described device also comprises:
Open control module, be greater than described higher limit for current time buffer zone buffer data size, or drop between described higher limit and described lower limit by being greater than described higher limit, open each tracking channel, until buffer data size is less than described lower limit.
Preferably, described device also comprises:
Microprocessor closing module, be less than described lower limit for current time buffer zone buffer data size, or when being less than described lower limit and rising between described higher limit and described lower limit, close microprocessor, until buffer data size is greater than described higher limit.
The present invention also provides a kind of control system of GNSS receiver, and described system comprises: above-mentioned arbitrary described control device and GNSS receiver.
In technical scheme of the present invention, for buffer zone is provided with higher limit and the lower limit of data cached capacity, when data cached capacity is less than described lower limit in buffer zone, close each tracking channel, make tracking channel in running status not; Now, if buffer cache data capacity increases, after still increasing, between described higher limit and described lower limit, continue to keep the closed condition of tracking channel.Because the speed of tracking channel deal with data is faster than the speed of buffer zone data writing, so, for fear of occurring that buffer zone does not have data, and the power wastage that causes tracking channel not have data processing also to bring in running status, when data cached when less in buffer zone, can close tracking channel, when data accumulation is after certain data volume, open again tracking channel and carry out data processing, be reduced in the power wastage causing due to the tracking channel free time in Satellite Tracking process.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of tracking channel;
Fig. 2 is the structural representation of multiple tracking channels and microprocessor;
Fig. 3 is the process flow diagram of the control method embodiment 1 of a kind of GNSS receiver of the present invention;
Fig. 4 is the process flow diagram of the control method embodiment 2 of a kind of GNSS receiver of the present invention;
Fig. 5 is the structural representation of the control 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 of the control 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 technical solution of the present invention corresponding a kind of receiver in the time of actual realization;
Figure 10 is the signal flow diagram of a kind of embodiment that applies technical solution of the present invention.
Embodiment
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
On the basis of Fig. 1 and Fig. 2, shown in figure 3, be the process flow diagram of the control method embodiment 1 of a kind of GNSS receiver provided by the invention, the present embodiment specifically can comprise:
Step 301: higher limit and lower limit that buffer data size in buffer zone is set.
The data that receive in GNSS receiver all write in buffer zone temporary, and the each data in buffer zone will be processed once separately through each tracking channel.Can not overflow because ensure buffer zone the power wastage problem that causes loss of data and tracking channel to bring in idle condition, in buffer zone described here, the higher limit of buffer data size is different from the maximal value that described buffer zone can be data cached, and the maximal value that described buffer zone can buffer data size can be used as a parameter obtaining buffer cache data volume higher limit.
Concrete, note higher limit is TH, so, described higher limit TH can be calculated by following formula:
Nmax-Round(T2/T1)–1；
Wherein said Round represents rounding operation, Nmax is the maximal value that described buffer zone can be data cached, T1 is during to buffer zone data writing, the duration of each data, T2 is that tracking channel generation integration/removing result is all exported the maximum duration between ready signal to carrier generator and code generator, and it is the signal that indication carrier wave generator and code generator arrive the phase place of carrier wave and pseudo-code and frequency adjusted NextState that described carrier generator and code generator are all exported ready signal.Give an example, suppose that intermediate-freuqncy signal data input speed is 16368000 per second, so, the duration T 1=1/16368000 second of each data.Suppose integration/remover output coherent integration value all produces ready signal maximum duration T2=100/16368000 second to carrier generator and code generator, the maximum data volume Nmax=1024 that can preserve in buffer zone of tracking channel.The higher limit that can calculate buffer cache data volume according to above-mentioned parameter is 923, in Project Realization, conventionally add certain safe clearance, in measurements and calculations, also have certain error, so can suitably reduce on the basis of the higher limit calculating in practical operation, such as, be 923 to reduce to 900 by higher limit.
Wherein, described T2 can be understood as in a data handling procedure, all exports the ready signal time used by integration/removing resume module is complete to carrier generator and code generator, in practical operation, can adopt the method for statistics to obtain.Such as, adopt the mode of timer, while recording in a period of time the each deal with data of each tracking channel, all export the ready signal time used by integration/removings resume module is complete to carrier generator and code generator, the time of recording from all tracking channels, selecting the longest time is exactly T2.
Accordingly, remember 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 more approaches higher limit, mixing, opening and closing relevant, integration/several modules such as removing in tracking channel are more frequent, can affect the effect that reduces power consumption.
Step 302: if buffer data size is less than described lower limit in current time buffer zone, or rise between described higher limit and described lower limit by being less than described lower limit, close each tracking channel until buffer data size is greater than described higher limit.
Data are not only inputted in buffer zone at every moment, the data that tracking channel is handled simultaneously, also will from buffer zone, delete, if buffer data size is less than the lower limit of setting in current time buffer zone, illustrate that in buffer zone, data are less, if start tracking channel deal with data, may cause buffer zone to occur the phenomenon of countless certificates.Now, in the time that each tracking channel does not all have data processing, close tracking channel.Tracking channel is deal with data not, so data can get more and more in buffer zone, still, as long as in buffer zone data capacity rise after still between described higher limit and described lower limit, can keep the closed condition of tracking channel.When data cached capacity in buffer zone exceedes after higher limit, then open tracking channel deal with data.
In the technical scheme of the present embodiment, for buffer zone is provided with higher limit and the lower limit of buffer data size, when data cached capacity is less than described lower limit in buffer zone, close each tracking channel, make tracking channel in running status not; Now, if buffer cache data volume increases, after still increasing, between described higher limit and described lower limit, continue to keep the closed condition of tracking channel.In the present embodiment, data cached when less in buffer zone, can close tracking channel, after being accumulated to certain data volume, then opening tracking channel and carry out data processing.Because the speed of tracking channel deal with data is faster than the speed of buffer zone data writing, so, can avoid occurring that by the control strategy of the tracking channel in the technical scheme of the present embodiment buffer zone does not have data, and the power wastage that causes tracking channel not have data processing also to bring in running status is reduced in the power wastage causing due to the tracking channel free time in Satellite Tracking process.
The technical scheme of above-described embodiment 1 has solved the technical matters of the power wastage bringing because of the tracking channel free time, but from the workflow of tracking channel, when data cached when less in buffer zone, tracking channel is closed, now, microprocessor does not have data processing yet, and microprocessor, still in running status, also can cause the waste of power consumption equally to a certain extent.For this reason, the present invention also provides a kind of control method embodiment 2 of GNSS receiver, shown in figure 4, for the process flow diagram of the control method embodiment 2 of a kind of GNSS receiver provided by the invention, in the present embodiment, the implementation of the specific implementation of step in the same manner as in Example 1 in can reference example 1, does not remake concrete introduction to it in the present embodiment.The present embodiment can be regarded as a specific implementation on embodiment 1 basis, further solves the power wastage that has microprocessor to bring.The present embodiment specifically can comprise:
Step 401: higher limit and lower limit that buffer data size in buffer zone is set;
Step 402: if buffer data size is less than described lower limit in current time buffer zone, or rise between described higher limit and described lower limit by being less than described lower limit, close each tracking channel until buffer data size is greater than described higher limit.
Step 403: close microprocessor, until buffer data size is greater than described higher limit.
In the time that in buffer zone, data are less, each tracking channel does not all have data to process, and now in microprocessor, does not have data pending yet, if continue to keep the running status of microprocessor, equally also can waste power consumption, so, in closing tracking channel, also can close microprocessor.The described microprocessor of cutting out can be to cut out for carrier wave ring Discr., code ring Discr., carrier wave ring wave filter and Loop filter that software is realized.
Step 404: if buffer data size is greater than described higher limit in current time buffer zone, or drop between described higher limit and described lower limit by being greater than described higher limit, open each tracking channel, until buffer data size is less than described lower limit.
If buffer data size is greater than higher limit in buffer zone, now will opens tracking channel and carry out data processing, in order to avoid buffer zone causes loss of data because overflow.After tracking channel is opened, meanwhile, microprocessor also will be opened and carry out data processing.Data are also continuing to be written into buffer zone, just close immediately the data processing of tracking channel so can not be less than higher limit at buffer area data volume.If closed immediately, tracking channel is deal with data not, may cause tracking channel just to be closed, and in buffer zone, the data volume of buffer memory exceeds again the situation of higher limit, and for fear of opening and closing tracking channel frequently, impact reduces the effect of power consumption.Preferably, in practical operation, can keep the opening of tracking channel to be less than lower limit until buffer area data volume drops to.
The technical scheme of the present embodiment, except the beneficial effect that embodiment 1 brings, further, when tracking channel is closed, closes microprocessor, has further reduced power consumption.When buffer data drops to while being less than higher limit by being greater than higher limit, do not close immediately tracking channel, avoid opening and closing tracking channel frequently, impact reduces the effect of power consumption.
Corresponding to embodiment of the method, corresponding, the present invention also provides a kind of control device of GNSS receiver, shown in figure 5, is the structural representation of the control device embodiment 1 of a kind of GNSS receiver provided by the invention, and described device comprises:
Limit value arranges module 501, for higher limit TH and the lower limit TL of buffer zone buffer data size are set;
Closing control module 502, be less than described lower limit for current time buffer zone buffer data size, or when being less than described lower limit and rising between described higher limit and described lower limit, close each tracking channel until buffer data size is greater than described higher limit.
Wherein, limit value arranges the structural representation of module 501 can be with reference to shown in figure 6, shown in limit value module 501 is set can comprises:
Higher limit arranges submodule 601, and for the higher limit of buffer cache data volume is set, described higher limit is Nmax-Round (T2/T1) – 1; Wherein said Round represents rounding operation, and Nmax is the maximum amount of data that described buffer zone can hold, and T1 is the duration that writes according to each data of the input speed calculating of buffer zone data writing; T2 is that tracking channel generation integration/removing result is all exported the maximum duration between ready signal to carrier generator and code generator;
Lower limit arranges submodule, and for the lower limit of buffer cache data volume is set, described lower limit is set to the arbitrary nonnegative integer in [0, TH-1].
The function that in device, each module realizes is corresponding with method operation steps in embodiment of the method 1, repeats no more here.
Preferably, shown in figure 7, be the structural representation of the control device embodiment 2 of a kind of GNSS receiver provided by the invention, except the module shown in Fig. 5, described device can also comprise:
Open control module 701, be greater than described higher limit for current time buffer zone buffer data size, or drop between described higher limit and described lower limit by being greater than described higher limit, open each tracking channel, until buffer data size is less than described lower limit.
Microprocessor closing module 702, is less than described lower limit for current time buffer zone buffer data size, or when being less than described lower limit and rising between described higher limit and described lower limit, closes microprocessor.
Preferably, shown in figure 8, be the structural representation of the control system embodiment 1 of a kind of GNSS receiver provided by the invention, described system can comprise: the control device 801 of GNSS receiver and GNSS receiver 802.The control device 801 of described GNSS receiver is the control device shown in the arbitrary figure of described Fig. 5 to Fig. 7.
Preferably, shown in figure 9, for technical scheme of the present invention corresponding a kind of structural representation when actual the realization, comprise that taking GNSS receiver 12 tracking channels are as example, wherein power consumption control module is the control device described in above several embodiment, and power consumption control module is controlled respectively the duty of microprocessor and each tracking channel.
Concrete can be with reference to shown in Figure 10, for a kind of a kind of signal flow diagram corresponding to embodiment that uses technical solution of the present invention, the data volume of buffer memory in power consumption control module Real-time Obtaining buffer zone, then according to the magnitude relationship of the data volume of buffer memory and higher limit and lower limit, transmit control signal to tracking channel and microprocessor.Wherein integration/removing module status represents that integral operation completes, each module control signal is for controlling the opening and closing of mixing, relevant, code generator and carrier generator, described mixing, relevant, code generator and carrier generator can use same control signal, open simultaneously or close.The ready signal of described carrier generator and code generator and integration/removing module status signal all send to power consumption control module, and the ready signal that receives described carrier generator and code generator when power consumption control module represents code generator and carrier generator corresponding carrier wave and pseudo-code while the frequency of carrier wave and pseudo-code having been adjusted to next data processing with phase place.Now, power consumption control module just can be thought processed (being handled by all tracking channels) of current data.Now, the data that buffer block deletion is treated, and up-to-date data volume is sent to power consumption control module, by the follow-up signal processing of power consumption control module control.In practical operation, can adopt the mode control tracking channel of high and low level or the opening and closing of microprocessor.
It should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
For system embodiment, because it corresponds essentially to embodiment of the method, so relevant part is referring to the part explanation of embodiment of the method.System embodiment described above is only schematic, the wherein said unit as separating component explanation can or can not be also physically to separate, the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of module wherein to realize the object of the present embodiment scheme.Those of ordinary skill in the art, in the situation that not paying creative work, are appreciated that and implement.
The above is only the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a control method for GNSS receiver, is characterized in that, described method comprises:
Higher limit TH and the lower limit TL of buffer data size in buffer zone are set;
If buffer data size is less than described lower limit in current time buffer zone, or rise between described higher limit and described lower limit by being less than described lower limit, close each tracking channel until buffer data size is greater than described higher limit.
2. method according to claim 1, is characterized in that, the setting of described higher limit TH comprises:
That calculates each data according to the speed of buffer zone data writing writes duration T 1;
Calculate from tracking channel generation integration/removing result and all export the maximum duration T2 ready signal to carrier generator and code generator;
Described higher limit TH be set to Nmax-Round (T2/T1) – 1, wherein said Round represents rounding operation, Nmax is the maximum amount of data that described buffer zone can hold.
3. method according to claim 1, is characterized in that, described lower limit TL is set to the arbitrary nonnegative integer in [0, TH-1].
4. method according to claim 1, is characterized in that, described method also comprises:
If buffer data size is greater than described higher limit in current time buffer zone, or drop between described higher limit and described lower limit by being greater than described higher limit, open each tracking channel, until buffer data size is less than described lower limit.
5. method according to claim 1, is characterized in that, described method also comprises:
In current time buffer zone, buffer data size is less than described lower limit, or rises between described higher limit and described lower limit by being less than described lower limit, closes microprocessor, until buffer data size is greater than described higher limit.
6. a control device for GNSS receiver, is characterized in that, described device comprises:
Limit value arranges module, for higher limit TH and the lower limit TL of buffer zone buffer data size are set;
Closing control module, be less than described lower limit for current time buffer zone buffer data size, or when being less than described lower limit and rising between described higher limit and described lower limit, close each tracking channel until buffer data size is greater than described higher limit.
7. device according to claim 6, is characterized in that, described limit value arranges module and comprises:
Higher limit arranges submodule, and for the higher limit of buffer cache data volume is set, described higher limit is Nmax-Round (T2/T1) – 1; Wherein said Round represents rounding operation, and Nmax is the maximum amount of data that described buffer zone can hold, and T1 is the duration that writes according to each data of the input speed calculating of buffer zone data writing; T2 is that tracking channel generation integration/removing result is all exported the maximum duration between ready signal to carrier generator and code generator;
Lower limit arranges submodule, and for the lower limit of buffer cache data volume is set, described lower limit is set to the arbitrary nonnegative integer in [0, TH-1].
8. device according to claim 6, is characterized in that, described device also comprises:
Open control module, be greater than described higher limit for current time buffer zone buffer data size, or drop between described higher limit and described lower limit by being greater than described higher limit, open each tracking channel, until buffer data size is less than described lower limit.
9. device according to claim 6, is characterized in that, described device also comprises:
Microprocessor closing module, be less than described lower limit for current time buffer zone buffer data size, or when being less than described lower limit and rising between described higher limit and described lower limit, close microprocessor, until buffer data size is greater than described higher limit.
10. a control system for GNSS receiver, is characterized in that, described system comprises:
Control device described in described claim 6-9 any one and GNSS receiver.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676689A (en) * | 2016-01-11 | 2016-06-15 | 中国电子科技集团公司第十研究所 | Collected data cyclic storage and distribution method in real-time software receiver |
| CN115586975A (en) * | 2022-12-13 | 2023-01-10 | 成都奇芯微电子有限公司 | Dynamic management method for embedded end GNSS memory |
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