CN104601175A - Pulse code modulation type jump-point handling method for telemeasuring data - Google Patents
Pulse code modulation type jump-point handling method for telemeasuring data Download PDFInfo
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- CN104601175A CN104601175A CN201410704940.9A CN201410704940A CN104601175A CN 104601175 A CN104601175 A CN 104601175A CN 201410704940 A CN201410704940 A CN 201410704940A CN 104601175 A CN104601175 A CN 104601175A
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Abstract
The invention provides a pulse code modulation type jump-point handling method for telemeasuring data. The method is that the checksum is divided into subframe checksum and secondary-frame checksum, wherein the subframe checksum is the sum of all channel data (exclude subframe synchronous code) in the subframe and is at the last channel of each subframe; the secondary-frame checksum is the sum of all channel data in the secondary-frame and is at the last channel of the secondary-frame; the last channel data of the whole frame is the sum of all subframe checksum; the jump-point channel is determined through the subframe checksum and the secondary-frame checksum; the accurate channel data value can be obtained through the accurate data of the rest channels of the subframe (or secondary-frame) and the checksum. According to the pulse code modulation type jump-point handling method for the telemeasuring data, the data checksum method is added to the PCM frame format, so that the telemeasuring data can achieve the error detection and correction capacity, and as a result, the jump-point removing purpose can be achieved.
Description
Technical field
The present invention relates to a kind of telemetry data reduction processing method, especially a kind of pulse code modulation telemetry hop processing method.
Background technology
Telemetry is the important channel obtaining its operating state in aircraft process of the test, and affect by factors such as attitude of flight vehicle, the ground telemetering station quality of reception and other interference, telemetry hop cannot be avoided.PCM remote measurement is widely used in aircraft test, and according to 5.1.4 item regulation in GJB21.2A-92 " telemetry standards multiple signals form ", PCM frame format is made up of subframe and subframe, and each subframe comprises synchronizing sub-frame code character.
The method of current process telemetry hop with synchronizing sub-frame code for basis for estimation, if synchronizing sub-frame, think that this sub-frame data is all correct, if subframe is not synchronous, this sub-frame data is all rejected, and the method exists the shortcoming cannot rejecting telemetry hop or unnecessary rejecting valid data.
Prior art can not meet the needs of people, and for making up prior art deficiency, the present invention aims to provide a kind of pulse code modulation telemetry hop processing method.
For achieving the above object, the present invention by the following technical solutions: a kind of pulse code modulation telemetry hop processing method, School Affairs is divided into subframe School Affairs and subframe School Affairs; Described subframe School Affairs is all radio frequency channel data sums in its subframe (not containing synchronizing sub-frame code), is positioned at last radio frequency channel of each subframe; Described subframe School Affairs is all radio frequency channel data sums in its subframe, is positioned at last radio frequency channel of this subframe; Last radio frequency channel data of full frame are all subframe School Affairs sums; By subframe School Affairs, subframe School Affairs determination hop place radio frequency channel, and remain radio frequency channel correct data and School Affairs according to this subframe (or subframe), obtain this radio frequency channel correct data value.
Compared with prior art, the invention has the beneficial effects as follows: this pulse code modulation telemetry hop processing method, by adding check sum method in PCM frame format, making telemetry have EDC error detection and correction ability, finally reaching the object of hop; Hop in PCM frame format telemetry can be chosen and error correction, obtain the correct telemetry of this radio frequency channel; Overall structure is simple, practical, easily manufactured, is easy to promote the use of.
Summary of the invention
Accompanying drawing explanation
Fig. 1 is the PCM frame format schematic diagram specified in national military standard;
Fig. 2 is the PCM frame format structural representation of interpolation School Affairs of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 ~ 2, in the embodiment of the present invention, a kind of pulse code modulation telemetry hop processing method, School Affairs is divided into subframe School Affairs and subframe School Affairs; Described subframe School Affairs is all radio frequency channel data sums in its subframe (not containing synchronizing sub-frame code), is positioned at last radio frequency channel of each subframe; Described subframe School Affairs is all radio frequency channel data sums in its subframe, is positioned at last radio frequency channel of this subframe; Last radio frequency channel data of full frame are all subframe School Affairs sums; By subframe School Affairs, subframe School Affairs determination hop place radio frequency channel, and remain radio frequency channel correct data and School Affairs according to this subframe (or subframe), obtain this radio frequency channel correct data value.
When aircraft end carries out pcm encoder, the School Affairs of each subframe and subframe is carried out calculating in rear insertion frame format.
In the telemetry that ground telemetering station receives, hop may be positioned at the radio frequency channel of subframe and subframe, also may be arranged in School Affairs.When carrying out data processing, addition calculation being carried out to data in each subframe received, if equal with subframe School Affairs, then think that this sub-frame data is correct, if all sub-frame data is correct, then thinking that this full frames of data is correct.Otherwise, data in each subframe are carried out addition calculation and compare with subframe School Affairs, if subframe School Affairs and subframe data and all equal, then think that full frames of data is normal, hop be present in subframe effect and in; Subframe School Affairs is different, then obtain hop place subframe, finally obtain hop place radio frequency channel, and the difference of this subframe School Affairs and subframe other radio frequency channel numerical value interior is the correct data of this hop.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
The above; be only preferred embodiment of the present invention; not in order to limit the present invention, every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalently replace and improve, within the protection range that all should be included in technical solution of the present invention.
Claims (1)
1. a pulse code modulation telemetry hop processing method, School Affairs is divided into subframe School Affairs and subframe School Affairs; It is characterized in that: described subframe School Affairs is all radio frequency channel data sums in its subframe (not containing synchronizing sub-frame code), is positioned at last radio frequency channel of each subframe; Described subframe School Affairs is all radio frequency channel data sums in its subframe, is positioned at last radio frequency channel of this subframe; Last radio frequency channel data of full frame are all subframe School Affairs sums; By subframe School Affairs, subframe School Affairs determination hop place radio frequency channel, and remain radio frequency channel correct data and School Affairs according to this subframe (or subframe), obtain this radio frequency channel correct data value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704940.9A CN104601175A (en) | 2014-12-01 | 2014-12-01 | Pulse code modulation type jump-point handling method for telemeasuring data |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410704940.9A CN104601175A (en) | 2014-12-01 | 2014-12-01 | Pulse code modulation type jump-point handling method for telemeasuring data |
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| CN104601175A true CN104601175A (en) | 2015-05-06 |
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| CN201410704940.9A Pending CN104601175A (en) | 2014-12-01 | 2014-12-01 | Pulse code modulation type jump-point handling method for telemeasuring data |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202967A (en) * | 2016-07-29 | 2016-12-07 | 江西洪都航空工业集团有限责任公司 | A kind of method rejecting telemetry analog quantity parameter hop |
| CN110827443A (en) * | 2019-10-24 | 2020-02-21 | 张东 | Remote measurement post data processing system |
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| CN1559033A (en) * | 2001-09-25 | 2004-12-29 | ض� | Double error correcting code system |
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| CN102323941A (en) * | 2011-09-01 | 2012-01-18 | 北京空间飞行器总体设计部 | Telemetry data processing method |
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Patent Citations (4)
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| US20020113718A1 (en) * | 2000-06-22 | 2002-08-22 | Michael Wei | Burst QAM downhole telemetry system |
| CN1559033A (en) * | 2001-09-25 | 2004-12-29 | ض� | Double error correcting code system |
| CN102156287A (en) * | 2011-03-17 | 2011-08-17 | 中国科学院计算技术研究所 | Initial positioning method for GPS (Global Position System) software receiver |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202967A (en) * | 2016-07-29 | 2016-12-07 | 江西洪都航空工业集团有限责任公司 | A kind of method rejecting telemetry analog quantity parameter hop |
| CN106202967B (en) * | 2016-07-29 | 2019-02-01 | 江西洪都航空工业集团有限责任公司 | A method of rejecting telemetry analog quantity parameter jump point |
| CN110827443A (en) * | 2019-10-24 | 2020-02-21 | 张东 | Remote measurement post data processing system |
| CN110827443B (en) * | 2019-10-24 | 2021-07-06 | 张东 | Remote measurement post data processing system |
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Application publication date: 20150506 |
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