Demodulation method to prevent data loss in transmission link

Abstract

A demodulation method for preventing transmission link data loss proposed by the present invention aims to provide a method for solving transmission data loss before signal synchronization during signal demodulation. The present invention is realized through the following technical solutions: in the transmission link, the carrier Doppler and phase estimation module performs carrier Doppler and phase estimation on the received signal, and sends the estimation result to the non-coherent demodulation module and the carrier and phase estimation module. Synchronization tracking module. The non-coherent demodulation module completes the non-coherent demodulation of the received signal according to the carrier Doppler and phase estimation results. The carrier and bit synchronization tracking module completes the synchronization with the received signal, and sends the synchronized data to the coherent demodulation module for coherent demodulation. The demodulation result selection module selects and outputs the demodulation result of non-coherent demodulation or the demodulation result of coherent demodulation according to the lock flag generated by the carrier and bit synchronization tracking module. The invention solves the defect that the traditional signal demodulation method cannot output demodulated data before signal synchronization.

Description

technical field [0001] The invention relates to a signal demodulation method suitable for wireless communication, and is particularly suitable for occasions requiring high timeliness and integrity of transmitted data in the wireless communication process. Background technique [0002] With the development of space technology, the demand for transmission of large-capacity data such as high-resolution images and videos is getting higher and higher. There are more and more data transmission methods between space vehicles and other targets, and between space vehicles and ground stations. There are more and more signal forms such as burst signals, continuous signals, and adaptive transmission signals. Currently commonly used methods for receiving burst signals have poor performance and can only demodulate signals in a short period of time. When the signal lasts for a long time, the demodulation performance will seriously deteriorate. However, the currently commonly used receptio...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem in the prior art that the demodulation data cannot be output before the receiving device is synchronized with the transmission signal, resulting in the problem that the first segment of data sent in each receiving process cannot be recovered, and to provide a high transmission efficiency that can avoid Data loss, and a demodulation method that can fully receive the received signal during the signal receiving process

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