TDRSS ground station information frame equalization modulation method

Abstract

The TDRSS ground station information frame equalization modulation method disclosed by the invention can improve the period stability of the ground station data frame of the tracking and data relay satellite system. According to the technical scheme, in different types of information frame modulation receiving systems, various information frames generated by different data sources enter an FIFO buffer area corresponding to the front end of each modulator of a ground station through network transmission, the information frames are read from the FIFO data buffer areas according to the first-in first-out sequence and are modulate into intermediate-frequency signals. The information frame rearrangement algorithm processor carries out time polling arrangement on information frame data in a timeaccumulation mode, carries out balanced modulation on information frames of all data sources again, and sends the modulated information frames to the information frame rearrangement algorithm processor to carry out balanced modulation on the information frames. And the equalized and modulated data frame are transmitted to a satellite receiver through a channel,the information frame is demodulatedthrough the satellite receiver, and then is distributed to different buffer areas according to a data source to which the data belongs.

Description

technical field [0001] The invention relates to the fields of network, measurement and control, communication and the like, in particular to a tracking and data relay satellite system (TDRSS) ground station information frame equalization modulation method in the field of communication information arrangement and design. Background technique [0002] As the "heart" of the entire network, the data relay satellite TDRSS ground system mainly includes ground terminal stations, ranging retransmission stations, and network control centers. TDRSS is the long-link transmission of the sky / earth loop. The I and Q two orthogonal channels transmit the spread spectrum command and the ranging code respectively. Its transmission link can be divided into two parts. The ground terminal station is relayed The link from the satellite to the user spacecraft is the forward link, and the link from the ground terminal station is the return link. The TDRSS multi-mode modulator can generate multiple...

AI Technical Summary

Problems solved by technology

These fluctuating information frames will also enter the back-end data buffer of the receiver at fluctuating frequencies after passing through the modulation and demodulation system. When the fluctuating amplitude is large, it may even cause buffer overflow and data loss.

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