Short time burst communication carrier synchronization method based on signal forward-reverse order cyclic splicing

Abstract

The invention discloses a short time burst communication carrier synchronization method based on signal forward-reverse order cyclic splicing. According to the method, the carrier synchronization purpose is mainly achieved by storing a received short time burst signal, circularly using signals entering a digital receiver in the forms of forward order and reverse order based on the idea of backtracking to ensure the phase continuity, and continuously performing phase-locked loop processing. By adoption of the signal forward-reverse order cyclic splicing method, the carrier synchronization can still be completed under the condition that the received data length is very short, and the problem of phase mutation when the received data are processed is well solved.

Description

technical field

[0001] The invention relates to carrier synchronization technology in the communication field, and is aimed at the carrier synchronization technology in short-time burst communication. Background technique

[0002] In a digital receiver, the output signal-to-noise ratio of the coherent demodulation scheme is 3dB higher than that of the non-coherent demodulation scheme, and the demodulation performance is better, but the synchronization deviation of frequency and phase in the coherent demodulation will cause significant deterioration of the bit error performance . The key technology in realizing the coherent demodulation scheme is the carrier synchronization technology, that is, a local oscillation with the same frequency and phase as the carrier of the received signal is generated in the receiving device. According to the principle of synchronous parameter compensation, carrier synchronization technology can be divided into two types: open-loop feedforward m...

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