Precise tracking and measuring method of high dynamic signal of air fleet link

Abstract

The invention relates to a precise tracking and measuring method of a high dynamic signal of an air fleet link, belonging to the technical field of aeronautical data links and radio navigation, and aiming at providing a precise tracking and measuring method of the high dynamic signal the an air fleet link and an implementation structure to solve the problems in the prior art. The invention provides a system framework of the precise tracking and measuring method of the high dynamic signal of the air fleet link, which can be implemented on a digital signal processor (DSP) and a FPGA (field programmable gate array) of a circuit board, and overcomes the defects of the unfavorable precision of a traditional high dynamic receiver by utilizing a double-loop structure of a frequency tracking loop of carrier tracking and a phase locking loop as well as a code phase locking loop to realize the high precise tracking under a high dynamic condition. The method can be widely applied to satellite navigation receivers, range measurement systems and communication systems based on a quiescent carrier modulation direct sequence spread spectrum system.

Description

Technical field: [0001] The invention relates to a precise tracking and measuring method for high dynamic signals of cluster links, and belongs to the technical fields of aviation data links and radio navigation. Background technique: [0002] Since the link between the member aircraft of the fleet adopts the suppressed carrier BPSK / QPSK phase-shift keying modulation system and the direct sequence spread spectrum mode, there will be problems in signal acquisition and tracking: [0003] ①Under the suppressed carrier communication system, the highly dynamic relative motion between the sender and the receiver causes difficulty in capture and tracking and frequent loss of lock and loss of capture; [0004] ② High dynamics lead to increased carrier tracking error, difficulty in accurate phase alignment of regenerated pseudo codes, and increased ranging and speed measurement errors; [0005] ③ The greatly increased probability of loss of lock and loss of capture will lead to diff...

AI Technical Summary

Problems solved by technology

[0003] ①Under the suppressed carrier communication system, the highly dynamic relative motion between the sender and the receiver causes difficulty in capture and tracking and frequent loss of lock and loss of capture;

[0004] ② High dynamics lead to increased carrier tracking error, difficulty in accurate phase alignment of regenerated pseudo codes, and increased ranging and speed measurement errors;

[0005] ③The probability of loss of lock and loss of capture will be greatly increased, which will lead to difficulties in continuous carrier phase measurement and integrated Doppler measurement

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