A time synchronization signal transmitting method and system based on general software radio

Abstract

This application proposes a method and system for transmitting time synchronization signals based on general-purpose software-defined radio (SDR). The method includes: constructing a time synchronization signal data frame based on input time information; performing direct sequence spread spectrum (DSSS) on the time synchronization signal data frame to obtain a spread digital sequence; modulating and mapping the spread digital sequence into a digital baseband IQ signal; transmitting the digital baseband IQ signal to a general-purpose software-defined radio peripheral; processing the signal through the peripheral; transmitting it via an antenna; and performing time delay calibration on the system before transmission to compensate for internal system delays. This application, by employing a software-defined radio architecture combined with a high-precision clock reference, achieves software-based, general-purpose, and high-precision processing throughout the entire process of time synchronization signal generation, processing, transmission, and calibration. The overall approach offers multiple advantages, including high flexibility, high precision, high reliability, low cost, easy scalability, and open research potential.

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