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Distance measurement and communication fusion transmission method based on composite code

A transmission method and composite code technology, applied in the field of digital communication and ranging, can solve the problems of reducing the performance of the telemetry subsystem, impairing the correct detection of ranging chips, etc.

Active Publication Date: 2021-08-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in both schemes, the ranging code is an interfering signal that degrades the performance of the telemetry subsystem, and errors in estimating the telemetry symbol impair correct detection of the ranging chip

Method used

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  • Distance measurement and communication fusion transmission method based on composite code
  • Distance measurement and communication fusion transmission method based on composite code
  • Distance measurement and communication fusion transmission method based on composite code

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Experimental program
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Embodiment approach

[0057] Such as figure 1 As shown, using the transmission method proposed by the present invention to carry out distance measurement and information transmission with composite codes, the specific steps are as follows:

[0058] (1) The ground station (Ground Station) superimposes the sparse coding of the uplink information sequence to be transmitted to the composite code, modulates and sends it;

[0059] (2) After the on-board unit (On-board Unit) receives the transmission signal, it first generates and restores the composite code according to the phase capture of the subcode, and then completes the frame synchronization of the superimposed data, and eliminates the composite code from the ranging signal to obtain The superimposed sparse coding sequence, and then decode the sparse coding sequence to obtain the transmission information, and finally the spaceborne unit sparsely codes the information to be transmitted and superimposes it on the regenerated composite code, and modul...

specific Embodiment

[0090] Specific embodiments: the present invention designs a distance measurement and communication fusion transmission method based on a composite code, and performs information transmission on the basis of ensuring distance measurement performance. A code stream and a carrier can be used to simultaneously realize distance measurement, communication signal synchronization, and two-way communication. Features. Combining this embodiment, the purpose, features and advantages of the invention can be further understood.

[0091] Give an example to illustrate the complex code ranging and communication process. In the embodiment of the present invention, a balanced 2 times weighted Tausworthe composite code (T2B) is used as the ranging code. The composite code is generated by Boolean logic combination of six subcodes. The subcodes are respectively:

[0092] C 1 =+1-1 (clock code)

[0093] C 2 =+1+1+1-1-1+1-1

[0094] C 3 =+1+1+1-1-1-1+1-1+1+1-1

[0095] C 4 =+1+1+1+1-1-1-1+1...

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Abstract

The invention discloses a distance measurement and communication fusion transmission method based on a composite code, and the method comprises the following steps: a ground station superposes an uplink to-be-transmitted information sequence sparse code to a composite code, and carries out the modulation and transmission; after a spaceborne unit receives a sending signal, a composite code is generated and recovered according to a subcode capture phase, then frame synchronization of superposed data is completed, the composite code is eliminated from a ranging signal, a superposed sparse coding sequence is obtained, the sparse coding sequence is decoded, and transmission information is obtained; finally, the spaceborne unit carries out sparse coding on information to be transmitted, superposes the information to the regenerated composite code, and modulates the information to a carrier for returning; and the ground station receives the return signal, completes composite code detection, further completes distance measurement, recovers a sparse coding sequence, and decodes and recovers downlink information sent by the node to be detected. According to the invention, multiple functions of distance measurement, communication signal synchronization and two-way communication can be simultaneously realized by using one code stream and carrier wave.

Description

technical field [0001] The invention relates to the technical field of digital communication and distance measurement, in particular to a distance measurement and communication fusion transmission method based on a composite code. Background technique [0002] Deep space ranging and communication technology is the basic technology in deep space exploration missions, and it is an important guarantee to ensure that space probes can successfully complete their scheduled tasks. With the rapid development of detection technology, detection tasks are shifting from short-term, simple and rough detection to long-term, high-resolution, strong autonomy, and multi-target fine detection, which has prompted new requirements and challenges for deep space ranging and communication. . However, traditional ranging and communication technologies are usually implemented by independent ranging systems and communication systems, which are not enough to meet the growing demand in future deep spa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B1/7073G01S19/03
CPCH04B7/1851H04B1/7073G01S19/03Y02D30/70
Inventor 陈为刚何亚龙韩昌彩
Owner TIANJIN UNIV
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