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Pulse code modulation type jump-point handling method for telemeasuring data

A pulse code modulation, telemetry data technology, applied in the direction of code conversion, individual digital conversion, electrical components, etc., can solve the problems of inability to eliminate telemetry data jump points, redundant elimination of valid data, etc., to achieve easy promotion and use, strong practicability, Create convenient effects

Inactive Publication Date: 2015-05-06
JIANGXI HONGDU AVIATION IND GRP
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Problems solved by technology

[0003] The current method of processing telemetry data jumps is based on the subframe synchronization code. If the subframe is synchronized, the subframe data is considered correct. If the subframe is not synchronized, the subframe data is all removed. This method cannot remove telemetry data jumps. Or the disadvantage of redundantly excluding valid data

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  • Pulse code modulation type jump-point handling method for telemeasuring data
  • Pulse code modulation type jump-point handling method for telemeasuring data

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Embodiment Construction

[0009] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0010] see Figure 1~2 , in an embodiment of the present invention, a pulse code modulation telemetry data jump point processing method, the checksum is divided into a subframe checksum and a subframe checksum; the subframe checksum is all waves in the subframe The sum of channel data (excluding subframe synchronization code), located in the last channel of each subframe; the subframe checksum is the sum of all channel data in the subframe, located in the last...

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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 [0001] The invention relates to a telemetry data processing method, in particular to a pulse code modulation telemetry data jump point processing method. Background technique [0002] Telemetry data is an important way to obtain the working status of the aircraft during the test process. Affected by factors such as aircraft attitude, reception quality of the ground telemetry station, and other interferences, telemetry data jumps cannot be avoided. PCM telemetry is widely used in aircraft tests. According to item 5.1.4 of GJB21.2A-92 "Telemetry Standard Multi-channel Signal Format", the PCM frame format consists of subframes and subframes, and each subframe contains subframe synchronization code groups. [0003] The current method of processing telemetry data jumps is based on the subframe synchronization code. If the subframe is synchronized, the subframe data is considered correct. If the subframe is not synchronized, the subframe data is all removed. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M5/10
Inventor 赵广超袁飞马邓美欢张玉新马文超沙雪凤熊薇王先发唐旭周曦李科连
Owner JIANGXI HONGDU AVIATION IND GRP
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