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Universal pseudocode synchronization system of comprehensive satellite baseband equipment

A technology for baseband equipment and pseudo-code synchronization, applied in transmission systems, electrical components, etc., can solve problems such as long capture time, increased capture time, and long pseudo-code

Active Publication Date: 2012-07-18
BEIHANG UNIV
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Problems solved by technology

This method is actually a three-dimensional search of pseudo-code phase, carrier Doppler frequency offset and data bits. When the code length is long, the acquisition time will be greatly increased.
[0005] (2) The pseudo-code used for ranging usually has a long code length, so the phase of the pseudo-code can only be found by partial correlation method
This requires a longer capture time when the code length is longer

Method used

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  • Universal pseudocode synchronization system of comprehensive satellite baseband equipment
  • Universal pseudocode synchronization system of comprehensive satellite baseband equipment
  • Universal pseudocode synchronization system of comprehensive satellite baseband equipment

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Embodiment Construction

[0105] Such as figure 1 Shown, the general pseudo-code synchronous system of a kind of satellite integrated baseband equipment of the present invention comprises 6 parts: digital down-conversion module (10), tracking correlation module (20), capturing preprocessing module (30), capturing correlation module (40) ), the capture management module (50) and the tracking control module (60), complete the pseudo code capture, carrier tracking, pseudo code tracking and bit synchronization functions of the remote control or ranging data in the satellite test process according to a certain flow. The six parts mentioned above are all implemented in FPGA. The relationship between them is: the digital baseband signal obtained after the input signal passes through the digital down-conversion module (10) enters the tracking correlation module (20) and the capturing preprocessing module (30) respectively; After integral accumulation and buffering of the local pseudo-code signal input by the ...

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Abstract

The invention relates to a universal pseudocode synchronization system of comprehensive satellite baseband equipment, and the system comprises six parts, i.e. a digital lower variable frequency module (10), a tracking related module (20), a capture pre-processing module (30), a capture related module (40), a capture management module (50) and a tracking control module (60), and completes the pseudocode capture, carrier tracking, pseudocode tracking and bit synchronization functions of remote control or range finding data in a test to a satellite according to a preset process; and the six parts are realized in a field-programmable gate array (FPGA). According to the universal pseudocode synchronization system of the comprehensive satellite baseband equipment, the parameters of the capture module are configured flexibly according to the test needs of the actual satellite, so that the quick capture and tracking of various remote control signal or range finding signal pseudocodes are realized, and the system has better practical value and wide application prospect in the technical field of comprehensive satellite baseband testing.

Description

technical field [0001] The invention relates to a direct sequence spread spectrum pseudocode synchronization system. In particular, it relates to a general pseudo-code synchronization system for satellite integrated baseband equipment, which is a general spread spectrum pseudo-code synchronization system suitable for the satellite integrated baseband system and whose code length and data rate can be configured. The invention belongs to the technical field of satellite comprehensive baseband testing. Background technique [0002] Integrated baseband equipment refers to the terminal equipment that organically integrates multiple functions such as distance measurement, speed measurement, remote control, telemetry, and data transmission in the satellite measurement and control communication system. , an important part of TT&C) mission, satellite pre-launch test and satellite in-orbit test. The integrated baseband equipment uses a unified spread spectrum measurement and control...

Claims

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Application Information

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IPC IPC(8): H04B1/7075H04B1/7073
Inventor 冯文全邢小地周淦孙泽斌刘曦王冬
Owner BEIHANG UNIV
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