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Spaceborne receiver demodulation and multiplexing method, device, electronic equipment and storage medium

A space-borne receiver and user-receiving technology, which is applied in the field of satellite communication, can solve the problems of increasing demodulation delay, occupying storage resources, on-board computing resources, storage resources and limited energy supply, etc., and achieves the goal of reducing resources Effect

Active Publication Date: 2021-11-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the demand for multi-user simultaneous demodulation is met by increasing the number of demodulation modules. However, due to the strict control of the volume, weight and power consumption of low-orbit satellite communication loads, the computing resources, storage resources and energy supply on the satellite are severely limited. severely limited
Therefore, when faced with multiple users, it is not advisable to directly increase the demodulation module, which not only occupies a large amount of storage resources, but also increases the demodulation delay, and the estimation accuracy of the frequency offset is low

Method used

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  • Spaceborne receiver demodulation and multiplexing method, device, electronic equipment and storage medium
  • Spaceborne receiver demodulation and multiplexing method, device, electronic equipment and storage medium
  • Spaceborne receiver demodulation and multiplexing method, device, electronic equipment and storage medium

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Embodiment 1

[0063] In this embodiment, the states of all demodulation receivers are first detected, and all idle demodulation receivers are found and numbered; then the captured users are despread, assigned their user IDs, and Perform frame synchronization.

[0064] In this embodiment, segment demodulation is performed on the service segment of the user whose ID has been assigned. The specific method is to divide the service segment of the user into several segments for caching. It is required that the time delay for the demodulation receiver to process each piece of demodulated data shall not be greater than (or much smaller than) the time it takes to receive the first symbol of the next piece of data. In this way, it can be ensured that when the received data is processed, the buffer will not be filled with the next data while the current data is still being processed. The above situation may cause data overflow and loss during the demodulation process, resulting in problems with the ...

Embodiment 2

[0069] In this embodiment, it is assumed that the processing clock of the on-board demodulator module is , the data symbol rate is , the clock delay required for demodulation module processing is N; each section of data is 64 bits after the service segment data is segmented, and the data segment data can be segmented by different numbers according to different data rates. In this embodiment, for example, 2Ksps is used as the boundary, the part less than 2Ksps is divided into 256-bit segments, and the part greater than or equal to 2Ksps is divided into 128-bit segments.

[0070] In this embodiment, for the data sent by user 1, user 2, or even more users, the receiver allocates channels for data buffering after successful capture, and then sequentially performs frame synchronization processing on them. Since the data transmission rate of the duty segment is constant, it can be determined from the first symbol of receiving the current sub-data segment data of each user to the ...

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Abstract

The present application provides a demodulation and multiplexing method, device, electronic equipment and storage medium for a satellite-borne receiver. The method includes: receiving the spread spectrum signal sent by the user, and capturing the pilot frequency band of the spread spectrum signal, so as to distinguish the users according to the spread spectrum code in the pilot frequency band; Demodulate the cached sub-duty segment data in sequence; after the demodulation of the user's duty segment data is completed, determine the user's communication rate according to the user's transmission service indicated by the user's duty segment; The data segment is divided into multiple sub-data segments for caching, and the cached sub-segment data is sequentially demodulated. The application can realize real-time demodulation of different services of multiple users on the star, and consumes less resources.

Description

technical field [0001] The present application relates to the technical field of satellite communication, and in particular to a satellite-borne receiver demodulation multiplexing method, device, electronic equipment and storage medium. Background technique [0002] The low-orbit satellite communication system is one of the more and more widely used communication systems in recent years. Compared with high- and medium-orbit satellites, the transmission distance of low-orbit satellite communication systems is shorter than other communication systems, which can not only reduce the power of ground terminal transmitters, but also ensure low delay in information transmission. In order to meet the fifth generation of mobile communication technology 5G (fifith-generation) era, the short-frame burst communication based on the low-orbit satellite network should have high flexibility. A large number of users access the satellite network at the same time to complete different tasks. b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/69H04B7/185
CPCH04B1/69H04B7/18502
Inventor 罗士荀安建平王帅柯晟陈超宋哲
Owner BEIJING INSTITUTE OF TECHNOLOGYGY