Hybrid data conversion tracking method for weight balance Poisonus codes

A mixed data and balanced technology, applied in the field of deep space pseudocode ranging, can solve problems such as complex ranging process, and achieve the effect of increasing loop stability, reducing loop jitter, and improving stability.

Pending Publication Date: 2021-12-14
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

Traditional side tone ranging requires a more complicated distance capture process

Method used

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  • Hybrid data conversion tracking method for weight balance Poisonus codes

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Embodiment

[0052] In the development process of a parametric baseband processing chip using the hybrid data conversion tracking method, after applying this method, the T2B regeneration pseudo code is realized at an input power of -140dBm, which not only realizes fast capture and tracking, but also reduces the phase detection error increased by 3.5dB, and the ranging jitter was reduced by 3dB.

[0053] In the present invention, when the tracking state is in the unlocked state during code clock tracking, the C1 code sequence is used for phase identification with the in-phase and middle-phase branch correlation integral input loops; when the tracking state is in the pre-locked state during code clock tracking, the unlocked The fully synchronous pseudo-code sequence is simultaneously integrated with the in-phase and middle-phase branches to input the phase detection loop; it is proposed to use the C1 code sequence to correlate with the same-phase and middle-phase branches in the initial state...

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Abstract

The invention relates to a mixed data conversion tracking method for weight balance Poisonus codes, and belongs to the technical field of deep space pseudo code ranging. When the code clock is tracked and the tracking state is in an unlocked state, a C1 code sequence is used to carry out phase discrimination with an in-phase branch correlation integral input loop and a middle-phase branch correlation integral input loop respectively; when a code clock is tracked and a tracking state is in a pre-locking state, an incompletely synchronized pseudo code sequence is used for simultaneously carry out phase discrimination with the in-phase branch correlation integral input loop and the middle-phase branch correlation integral input loop; finally, mixed data conversion tracking is achieved, and high-precision and high-sensitivity signal regeneration of the weight balance Poisonus code can be completed according to the method; according to the method, the tracking performance of the regenerative pseudo code loop is greatly improved, so that the distance measurement precision under the deep space low signal-to-noise ratio is effectively improved, distance measurement jitter is greatly reduced, and meanwhile, the distance measurement reliability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of deep-space pseudo-code ranging, and relates to a mixed data conversion tracking method for weight-balanced Taosworth codes. Background technique [0002] With the successful landing of my country's Mars probe Tianwen-1 on the utopian plain of Mars, the pace of human exploration of deep space will surely go deeper and further. The ranging in aerospace measurement and control is mainly based on two-way coherent forwarding ranging, such as sequence tone ranging, sound code mixed ranging and side tone ranging. For longer-distance deep space exploration, the ranging accuracy of some commonly used ranging methods can no longer meet the requirements, such as side tone ranging. In order to ensure sufficient defuzzification ability of the side tone, the number and modulation degree of the transmitted side tone need to be increased. , the regenerative pseudo-code effectively solves the problem of ambiguity underst...

Claims

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Application Information

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IPC IPC(8): G01S11/00
CPCG01S11/00Y02D30/70
Inventor 成琦吉欣张瑾张宗攀李静澜
Owner XIAN INSTITUE OF SPACE RADIO TECH
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