CN102004257A - Method for broadcasting and receiving satellite navigation information by multiple rates - Google Patents
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Abstract
The invention discloses a method for broadcasting and receiving satellite navigation information by multiple rates and belongs to the field of satellite navigation systems. By the method, broadcast information is broadcasted in a way of multiple rates. An information rate is inconsistent with a symbol rate, so that the broadcast information is processed at the sending end in a way of copying or expanding of convolution to make the broadcast information broadcasted at the symbol rate. The broadcast information is recovered at the receiving end in a condensing way so as to restore the original broadcast information. Subframe information is broadcasted in a way of multiple rates so as to improve information broadcasting flexibility and reduce first positioning time at a low rate.
Description
Technical field
The present invention relates to the many speed of a kind of satellite navigation information and broadcast and method of reseptance, belong to the satellite navigation system field.
Background technology
Navigation information in the satellite navigation system is the binary code stream that is modulated on the navigation satellite signal, and its content has comprised the necessary information of subscriber computer positioning calculation such as ephemeris information, almanac information, various corrected parameters.The navigation information design comprises that the information content design and the mode of broadcasting design two parts.The mode of broadcasting is meant format form, coded system, broadcasts speed, frame structure, broadcast between order, star between frequently and broadcast order etc., and performance index such as the receiving sensitivity of subscriber computer, bearing accuracy, primary positioning time, integrity alarm time are had very big influence.
Along with satellite navigation system is complicated day by day, the satellite navigation range of application is increasingly extensive, and this has proposed new requirement to the information distributing mode.The information distributing mode is studied very big progress in recent years, HanspeterKuhlen has analyzed the principle of design that Galileo system navigation information is broadcast in " Design Criteria For RNSS Signal Emissions ", Betz etc. have provided the design proposal of GPSL1C signal in " L1C Signal Design Options ", wherein discussed and broadcast the influence of speed to navigation performance.Chen Nan etc. have provided the evaluation criterion of message structure in " Performance Evaluation of satellite navigation system navigation navigation message structure ", proposes five standards such as expandability, dirigibility, communication resources utilization ratio of required time of total amount of data, receiver user primary positioning time, one group of almanac data of reception in the data unit, text structure.Chen Jin equality is analyzed in document " satellite navigation message design analysis " and has been compared present several information design proposals, and the development trend of information design has been made summary.
Information formats such as the CNAV (civilnavigation) that determines in GPS modernization conceptual design and Galileo system design, CNAV-2, F/NAV, I/NAV have been embodied a concentrated reflection of current achievement in research.They compare with NAV (navigation) information format of GPS and are broadcasting speed, coding checkout mode, layout structure, broadcasting sequential scheduling several respects and improve, and have improved the index such as expandability, dirigibility, communication resource utilization ratio of receiving sensitivity, information distributing.
But severally broadcast modes owing to adopt single information rate (speed after the chnnel coding before the band spectrum modulation) to broadcast information at this, therefore dirigibility is subjected to very big restriction, also existence is elongated as the primary positioning time under the low rate information, and authorization message speed height influences problems such as threshold level.
Summary of the invention
The present invention proposes the many speed of a kind of satellite navigation information and broadcast and method of reseptance, use many speed mode that sub-frame information is broadcast, improved the dirigibility of information distributing and shortened primary positioning time.
Technical scheme of the present invention is as follows:
The many speed of a kind of satellite navigation information broadcast and method of reseptance comprises: determine its information rate according to the useful properties of various information in advance, the carrying of each subframe is the information type of useful properties fixedly, and the correspondence setting of subframe numbers and information rate is arrived receiving end.
The process of broadcasting comprises:
Steps A 1, transmitting terminal are handled the generation sub-frame information to broadcasting information.
Steps A 2, determine its information rate according to the useful properties of sub-frame information.
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance, when the information rate of judging current transmission sub-frame information and the proportionate relationship of character rate are 1: during n, then current transmission sub-frame information is carried out 1: the expansion position of n, and modulate with character rate and to broadcast away, n is the integer greater than 1.
Receiving course comprises:
Step B1, receiving end adopt described character rate to receive sub-frame information, extract the subframe numbers of current reception sub-frame information, according to the subframe numbers retrieval subframe numbers that is extracted and the corresponding relation of information rate, obtain the information rate of current reception sub-frame information.
Step B2, judge, when the information rate of judging current reception sub-frame information and the ratio of character rate are 1: during n, current reception sub-frame information is carried out n: 1 condense according to information rate that obtains among the step B1 and described character rate.
Step B3, the sub-frame information that processing among the step B2 is obtained transfer out.
Among the present invention current transmission sub-frame information is carried out 1: the expansion position of n is: directly in the sub-frame information that receives each is carried out 1: n duplicates, and wherein each duplicates the position and is replicated the position arrangement that links to each other with it.
Among the present invention current transmission sub-frame information is carried out 1: the expansion position of n is: carry out 1 to receiving sub-frame information: the n convolutional encoding; Among the present invention current transmission sub-frame information is carried out n: 1 condense for: carry out and 1 receiving sub-frame information: the corresponding decoding of n convolutional encoding.
The many speed of a kind of satellite navigation information are broadcast and method of reseptance,
The process of broadcasting comprises:
Steps A 1, transmitting terminal are handled the generation sub-frame information to broadcasting information.
Steps A 2, determine its information rate, the speed sign of expression information rate is added in the speed zone bit of sub-frame information according to the useful properties of sub-frame information.
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance, when the information rate of judging current transmission sub-frame information and the proportionate relationship of character rate are 1: during n, then the data content in the current transmission sub-frame information is carried out 1: the expansion position of n, and modulate with character rate and to broadcast away, n is the integer greater than 1.
Receiving course comprises:
Step B1, receiving end adopt described character rate to receive sub-frame information, extract the speed sign that comprises in the current reception sub-frame information, determine the information rate of the sub-frame information of current reception according to the speed sign that obtains.
Step B2, judge according to information rate that obtains among the step B1 and described character rate, when the information rate of judging current reception sub-frame information and the ratio of character rate are 1: during n, the data content in the current reception sub-frame information is carried out n: 1 condense.
Step B3, the sub-frame information that processing among the step B2 is obtained transfer out.
Among the present invention the data content in the current transmission sub-frame information is carried out 1: the expansion position of n is: directly each carries out 1 to the data content in the sub-frame information that receives: n duplicates, and wherein each duplicates the position and is replicated the position arrangement that links to each other with it.
The data content in the current transmission sub-frame information described in the present invention carries out 1: the expansion position of n is: the data content that receives in the sub-frame information is carried out 1: the n convolutional encoding; Carry out n among the present invention: 1 condense for: the data content that receives in the sub-frame information is carried out and 1: the corresponding decoding of n convolutional encoding.
Beneficial effect:
The present invention adopts many speed mode to broadcast broadcasting information, because information rate and character rate is inconsistent, therefore adopt the mode that expands the position to handle at transmitting terminal to broadcasting information, make the information of broadcasting adapt to character rate, adopt the mode that condenses to recover at receiving end, thereby reduce the original information of broadcasting broadcasting information.Owing to use many speed mode that sub-frame information is broadcast, improved the dirigibility of information distributing, shortened the primary positioning time under the low rate.
Secondly, the present invention's employing is duplicated or the mode of convolutional encoding expands broadcasting of the many speed of position realization to sub-frame information, and implementation procedure is simple.
Description of drawings:
Fig. 1 is the process flow diagram of broadcasting method of the present invention.
The process flow diagram of method of reseptance of the present invention during Fig. 2.
Embodiment:
Immutable many speed is duplicated the mode of broadcasting:
Sub-frame information speed and subframe numbers have corresponding relation during information distributing.
In the present embodiment, determine its information rate according to the useful properties of various information in advance, the carrying of each subframe is the information type of useful properties fixedly, and the correspondence setting of subframe numbers and information rate is arrived receiving end.
Wherein, the useful properties of sub-frame information can be service range such as authorization service, the open service etc. of information; The environment for use that can be information is as serving indoor weak signal environment, serving aviation good signal environment etc.; Can be content such as ephemeris information, the almanac information etc. of information.
The subframe numbers of sub-frame information and information rate corresponding relation for example are: the information of the first subframe bearer types 1, and its information rate with 50Hz is broadcast, the information of the second subframe bearer types 2, its information rate with 100Hz is broadcast.No longer change after each subframe loaded information type is fixing.
The concrete steps of transmission information comprise:
Steps A 1, transmitting terminal are handled broadcasting information, and soon it is filled into and constitutes sub-frame information in the frame structure, and sub-frame information is encoded.
Steps A 2, determine its information rate according to the useful properties of sub-frame information.
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance:
When the information rate of judging current transmission sub-frame information and the proportionate relationship of character rate are 1: during n, then current transmission sub-frame information is carried out 1: the expansion position of n, n is the integer greater than 1.
For example: character rate is 200Hz, and the information rate of first subframe is 50Hz; When broadcasting first subframe,, then this sub-frame information is carried out 1: 4 duplicating, as being copied into 0000111100001111 with 0101 because the ratio of character rate and the information rate of first subframe is 4: 1.
For example: character rate is 200Hz, and the information rate of second subframe is 100Hz; When broadcasting first subframe,, then this sub-frame information is carried out duplicating at 1: 2, as being copied into 00110011 with 0101 because the ratio of character rate and the information rate of first subframe is 2: 1.
Sub-frame information after handling modulated according to character rate broadcast away.
Immutable many speed is duplicated receive mode:
Step B1, receiving end adopt the character rate that is provided with in advance to receive sub-frame information, extract the subframe numbers of current reception sub-frame information, according to the subframe numbers retrieval subframe numbers that is extracted and the corresponding relation of information rate, obtain the information rate of current reception sub-frame information.
For example: first subframe is broadcast with the information rate of 50Hz among this embodiment, and second subframe is broadcast with the information rate of 100Hz.When from first sub-frame information that receives, extracting its subframe numbers, retrieve the corresponding relation of itself and information rate, determine that the information rate of the sub-frame information that receive this moment is 50Hz.When in receiving second sub-frame information, extracting its subframe numbers, then retrieve the corresponding relation of itself and information rate, determine that the information rate of the sub-frame information that receive this moment is 100Hz.
Step B2, judge according to information rate that obtains among the step B1 and character rate:
When the information rate of the sub-frame information of judging current reception and the ratio of character rate are 1: n, carry out n to this sub-frame information: 1 condense.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 50Hz, because the information rate of this sub-frame information is 1: 4 with the ratio of character rate, then per four the phase ortho position additions in the sub-frame information, addition result series arrangement.Wherein adding up at first sub-frame information with output carries out behind the multi bit quantization according to the character rate record, is 5bit as character rate for the 200Hz quantization digit, then write down the sub-frame information of 5bit output according to the speed of 200Hz, when information rate and character rate are 1: 4, will export the sub-frame information addition, become a symbol after quantizing.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 100Hz, because the information rate of this sub-frame information is 1: 2 with the ratio of character rate, then per two the phase ortho position additions in the sub-frame information, addition result series arrangement.
Step B3, the sub-frame information after handling among the step B2 is transferred out.
Immutable multi-rate coding is broadcast mode:
Sub-frame information speed and subframe numbers have corresponding relation during information distributing.
Determine its information rate according to the useful properties of various information in advance, the carrying of each subframe is the information type of useful properties fixedly, and the correspondence setting of subframe numbers and information rate is arrived receiving end.
Steps A 1, transmitting terminal are handled broadcasting information, and soon it is filled into and constitutes sub-frame information in the frame structure.
Steps A 2, determine its information rate according to the useful properties of sub-frame information.
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance:
When the information rate of judging current transmission sub-frame information and the proportionate relationship of character rate are 1: during n, then current transmission sub-frame information is carried out 1: the expansion position of n, n is the integer greater than 1.
For example, character rate is 200Hz, and the information of first subframe, speed are 50Hz; When broadcasting first subframe, because the ratio of the information rate of first sub-frame information and character rate is 1: 4, the convolutional encoding mode that then adopted 1: 4 is encoded to this sub-frame information.
For example: character rate is 200Hz, and the information rate of second subframe is 100Hz; When broadcasting second subframe, because the ratio of the information rate of second sub-frame information and character rate is 1: 2, the convolutional encoding mode that then adopted 1: 2 is encoded to this sub-frame information.
Sub-frame information after handling modulated according to character rate broadcast away.
Immutable multi-rate coding receive mode:
Step B1, receiving end adopt the character rate that is provided with in advance to receive sub-frame information, extract the subframe numbers of current reception sub-frame information, according to the corresponding relation of extraction subframe numbers retrieval subframe numbers and information rate, obtain the information rate of current reception sub-frame information.
For example: first subframe is broadcast with the information rate of 50Hz among this embodiment, and second subframe is broadcast with the information rate of 100Hz.When the subframe numbers that from first sub-frame information that receives, extracts, retrieve the corresponding relation of itself and information rate, determine that the information rate of the sub-frame information that receive this moment is 50Hz.When in receiving second sub-frame information, extracting its subframe numbers, then retrieve the corresponding relation of itself and information rate, determine that the information rate of the sub-frame information that receive this moment is 100Hz.
Step B2, judge according to information rate that obtains among the step B1 and character rate:
When the information rate of the sub-frame information of judging current reception and the ratio of character rate are 1: n, carry out n to this sub-frame information: 1 condense.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 50Hz, because the information rate of this sub-frame information is 1: 4 with the ratio of character rate, then the sub-frame information employing of current reception is decoded with 1: 4 the corresponding decoding process of convolutional encoding.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 100Hz, because the information rate of this sub-frame information is 1: 2 with the ratio of character rate, then the sub-frame information employing of current reception is decoded with 1: 2 the corresponding decoding process of convolutional encoding.
Step B3, the sub-frame information after handling among the step B2 is transferred out.
Adaptive multi-rate duplicates the mode of broadcasting:
The information rate of subframe and subframe numbers do not have corresponding relation during information distributing, and each subframe can be provided with different kinds of information, determine the information rate that this subframe is broadcast according to the operating characteristic of information simultaneously.
Steps A 1, receiving end are broadcast information and are handled, and soon it is filled into and constitutes sub-frame information in the frame structure, and sub-frame information is encoded.
Steps A 2, determine its information rate, the speed sign of expression information rate is added in the speed zone bit of sub-frame information according to the useful properties of sub-frame information.Determine sub-frame information information rate can for: determine speed sign and information rate corresponding relation in the sub-frame information, speed as first subframe is masked as 01, then represent it to be broadcast with the information rate of 50Hz, the speed of second subframe is masked as 10, then represents with the information rate of 100Hz it to be broadcast.
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance:
Ratio 1 when the information rate of judging current transmission sub-frame information and character rate: n, the data content in the current transmission sub-frame information is carried out 1: the expansion position of n, n is the integer greater than 1.
For example: character rate is 200Hz, and the information rate of first subframe is 50Hz; When broadcasting first subframe and since the information rate of first sub-frame information and character rate ratio be 1: 4, then the data content in this sub-frame information is carried out 1: 4 duplicating, as being copied into 0000111100001111 with 0101.
For example: character rate is 200Hz, and the information rate of second subframe is 100Hz; When broadcasting second subframe and since the flank speed of second sub-frame information and character rate ratio be 1: 2, then the data content in this sub-frame information is carried out 1: 2 duplicating, as being copied into 00110011 with 0101.
Sub-frame information after handling modulated according to character rate broadcast away.
Adaptive multi-rate duplicates receive mode:
The character rate that step B1, receiving end employing are provided with in advance receives sub-frame information, and the sub-frame information that receives is followed the tracks of and frame synchronization, and the speed sign in the extraction sub-frame information speed zone bit is determined the information rate of sub-frame information.
For example: if the speed of extracting is masked as 01, represent that then this sub-frame information adopts the information rate of 50Hz to broadcast,, represent that then this sub-frame information adopts the information rate of 100Hz to broadcast if the speed of extracting is masked as 10.
Step B2, judge according to the information rate and the character rate that obtain sub-frame information among the step B1:
When the ratio of the information rate of the sub-frame information of judging current reception and character rate is 1: n, carry out n to the data content in this sub-frame information: 1 condense.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 50Hz, because the information rate of this sub-frame information is 1: 4 with the ratio of character rate, then per four phase ortho position additions of the data content in the sub-frame information, addition result series arrangement.Wherein adding up at first sub-frame information with output carries out behind the multi bit quantization according to the character rate record, is 5bit as character rate for the 200Hz quantization digit, then write down the sub-frame information of 5bit output according to the speed of 200Hz, when information rate and character rate are 1: 4, will export the sub-frame information addition, become a symbol after quantizing.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 100Hz, because the information rate of this sub-frame information is 1: 2 with the ratio of character rate, then per two phase ortho position additions of the data content in the sub-frame information, addition result series arrangement.
Step B3, the sub-frame information after handling among the step B2 is transferred out.
The adaptive multi-rate coding is broadcast mode:
The information rate of subframe and subframe numbers do not have corresponding relation during information distributing, extract the subframe numbers of current reception sub-frame information, according to the subframe numbers retrieval subframe numbers that is extracted and the corresponding relation of information rate, obtain the information rate of current reception sub-frame information.
Steps A 1, handle, be about to it and be filled into and constitute sub-frame information in the frame structure to sent information.
Steps A 2, determine its information rate, the speed sign of expression information rate is added in the speed zone bit of sub-frame information according to the useful properties of sub-frame information.Determine sub-frame information information rate can for: determine speed sign and information rate corresponding relation in the sub-frame information, speed as first subframe is masked as 01, then represent it to be broadcast with the information rate of 50Hz, the speed of second subframe is masked as 10, then represents with the information rate of 100Hz it to be broadcast.
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance:
Ratio 1 when the information rate of judging current transmission sub-frame information and character rate: n, the data content in this sub-frame information is carried out 1: the expansion position of n, n is the integer greater than 1.
For example: character rate is 200Hz, and the information rate of first subframe is 50Hz; When broadcasting first subframe, because the ratio of the information rate of first sub-frame information and character rate is 1: 4, the convolutional encoding mode that then adopted 1: 4 is encoded to the data content in this sub-frame information.
For example: character rate is 200Hz, and the information rate of second subframe is 100Hz; When broadcasting second subframe, because the ratio of the information rate of second sub-frame information and character rate is 1: 2, the convolutional encoding mode that then adopted 1: 2 is encoded to the data content in the sub-frame information.
Sub-frame information after handling modulated according to character rate broadcast away.
Adaptive multi-rate coding receive mode:
The character rate that step B1, receiving end employing are provided with in advance receives sub-frame information, and the sub-frame information that receives is followed the tracks of and frame synchronization, and the speed sign in the extraction sub-frame information speed zone bit is determined the information rate of sub-frame information.
For example: if the speed of extracting is masked as 01, represent that then this sub-frame information adopts the information rate of 50Hz to broadcast,, represent that then this sub-frame information adopts the information rate of 100Hz to broadcast if the speed of extracting is masked as 10.
Step B2, judge according to the information rate and the character rate that obtain sub-frame information among the step B1:
As the information rate of the sub-frame information of judging current reception and the ratio 1 of character rate: n, the data content in this sub-frame information is carried out n: 1 condense.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 50Hz, because the information rate of this sub-frame information is 1: 4 with the ratio of character rate, then the data content in the sub-frame information of current reception is adopted with 1: 4 the corresponding decoding process of convolutional encoding and decode.
For example: character rate is 200Hz, when the information rate of the sub-frame information of determining this subframe numbers correspondence according to subframe numbers is 100Hz, because the information rate of this sub-frame information is 1: 2 with the ratio of character rate, then the data content in the sub-frame information that receives is adopted with 1: 2 the corresponding decoding process of convolutional encoding and decode.
Step B3, the sub-frame information after handling among the step B2 is transferred out.
Claims (8)
1. the many speed of satellite navigation information are broadcast and method of reseptance, it is characterized in that,
Determine its information rate according to the useful properties of various information in advance, the carrying of each subframe is the information type of useful properties fixedly, and the correspondence setting of subframe numbers and information rate is arrived receiving end;
The process of broadcasting comprises:
Steps A 1, transmitting terminal are handled the generation sub-frame information to broadcasting information;
Steps A 2, determine its information rate according to the useful properties of sub-frame information;
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance, when the information rate of judging current transmission sub-frame information and the proportionate relationship of character rate are 1: during n, then current transmission sub-frame information is carried out 1: the expansion position of n, and modulate with character rate and to broadcast away, n is the integer greater than 1;
Receiving course comprises:
Step B1, receiving end adopt described character rate to receive sub-frame information, extract the subframe numbers of current reception sub-frame information, according to the subframe numbers retrieval subframe numbers that is extracted and the corresponding relation of information rate, obtain the information rate of current reception sub-frame information;
Step B2, judge, when the information rate of judging current reception sub-frame information and the ratio of character rate are 1: during n, current reception sub-frame information is carried out n: 1 condense according to information rate that obtains among the step B1 and described character rate;
Step B3, the sub-frame information that processing among the step B2 is obtained transfer out.
2. the many speed of satellite navigation information according to claim 1 are broadcast and method of reseptance, it is characterized in that, described useful properties is service range and/or the environment for use of information and/or the content of information of information.
3. the many speed of satellite navigation information according to claim 1 are broadcast and method of reseptance, it is characterized in that, described current transmission sub-frame information is carried out 1: the expansion position of n is: directly in the sub-frame information that receives each is carried out 1: n duplicates, and wherein each duplicates the position and is replicated the position arrangement that links to each other with it.
4. the many speed of satellite navigation information according to claim 1 are broadcast and method of reseptance, it is characterized in that, described current transmission sub-frame information are carried out 1: the expansion position of n is: carry out 1 to receiving sub-frame information: the n convolutional encoding; Described current reception sub-frame information is carried out n: 1 condense for: carry out and 1 receiving sub-frame information: the corresponding decoding of n convolutional encoding.
5. the many speed of satellite navigation information are broadcast and method of reseptance, it is characterized in that,
The process of broadcasting comprises:
Steps A 1, transmitting terminal are handled the generation sub-frame information to broadcasting information;
Steps A 2, determine its information rate, the speed sign of expression information rate is added in the speed zone bit of sub-frame information according to the useful properties of sub-frame information;
Steps A 3, judge according to information rate of determining in the steps A 2 and the character rate set in advance, when the information rate of judging current transmission sub-frame information and the proportionate relationship of character rate are 1: during n, then the data content in the current transmission sub-frame information is carried out 1: the expansion position of n, and modulate with character rate and to broadcast away, n is the integer greater than 1;
Receiving course comprises:
Step B1, receiving end adopt described character rate to receive sub-frame information, extract the speed sign that comprises in the current reception sub-frame information, determine the information rate of the sub-frame information of current reception according to the speed sign that obtains;
Step B2, judge according to information rate that obtains among the step B1 and described character rate, when the information rate of judging current reception sub-frame information and the ratio of character rate are 1: during n, the data content in the current reception sub-frame information is carried out n: 1 condense;
Step B3, the sub-frame information that processing among the step B2 is obtained transfer out.
6. the many speed of satellite navigation information according to claim 5 are broadcast and method of reseptance, it is characterized in that, described useful properties is service range and/or the environment for use of information and/or the content of information of information.
7. the many speed of satellite navigation information according to claim 5 are broadcast and method of reseptance, it is characterized in that, described data content in the current transmission sub-frame information is carried out 1: the expansion position of n is: directly each of the data content in the sub-frame information that receives is carried out 1: n duplicates, and wherein each duplicates the position and is replicated the position arrangement that links to each other with it.
8. the many speed of satellite navigation information according to claim 5 are broadcast and method of reseptance, it is characterized in that, described data content in the current transmission sub-frame information is carried out 1: the expansion position of n is: the data content that receives in the sub-frame information is carried out 1: the n convolutional encoding; Described data content in the current reception sub-frame information is carried out n: 1 condense for: the data content branch that receives in the sub-frame information is carried out and 1: the corresponding decoding of n convolutional encoding.
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| 《北京理工大学学报》 20100630 刘峰等 卫星导航接收机定点环路跟踪精度研究 第707-712页 1-8 第30卷, 第6期 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572374A (en) * | 2017-03-07 | 2018-09-25 | 北京华信泰科技股份有限公司 | A kind of method of reseptance and device of satellite navigation reinforcing system data |
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