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由于卫星信道是随参信道，所以其对于电波信号的衰减与延时十分严重。通过讨论移动卫星信道的传输特性，结合ＩＮＭＡＲＳＡＴ的Ｂ／Ｍ系统传真规范，研究了在移动卫星通信中的传真协议，以及须注意的问题和相应的解决措施。
As the satellite channel is with the reference channel, so its attenuation and delay of the radio signal is very serious. By discussing the transmission characteristics of mobile satellite channels, combined with INMARSAT’s B / M system fax specification, the fax protocol in mobile satellite communications is studied, as well as the issues needing attention and corresponding solutions.