Design and implementation of the second-generation COSPAS-SARSAT distress beacon based on SDR

COSPAS-SARSAT has currently completed the design of a new generation distress beacon systems, namely the second-generation distress beacon system. The second-generation distress beacon adopts DSSS-OQPSK as its basic signal modulation mode, while adopting a new signal detail structure. This paper provides a solution for the hardware implementation of the second-generation COSPAS-SARSAT distress beacon on Software-Defined Radio (SDR). Firstly, the baseband signal that meets the definition format of the second-generation beacon standard was generated, and then the second-generation beacon was transmitted through the Universal Software Radio Peripheral (USRP). By comparing with specific requirements of the second-generation distress beacon standard, the second-generation beacon generated by this paper can meet the requirements of the second-generation COSPAS-SARSAT distress beacon standard, and the method proposed in this paper has the advantages of flexibility and higher signal reconfigurability.