Search

Available beyond line‐of‐sight time synchronisation means are mainly through satellite and optical fibres. When considering that satellite links have insurmountable bandwidth and security problems, and cable links are not feasible for mobile stations, a backup two‐way time synchronisation means via troposcatter is proposed. The feasibility of the proposed method based on coherence bandwidth and transmission loss is analysed, and references for the time pulse signal design are provided. Then, two different signal time sequences schemes aiming at co‐channel interference are presented and evaluated, and the clock errors due to the incomplete symmetrical two‐way link are analysed. Finally, it is concluded that the proposed means is a promising candidate for beyond line‐of‐sight time synchronisation in emergency communication. [ABSTRACT FROM AUTHOR]