Channels of mobile satellite communications are affected by multipath fading and shadowing attenuation. At the same time,\ndiversity gains are believed to improve the transmission reliability in fading channels. Considering that the traditional Space-Time\nCoding (STC) is not suitable for the cooperative mobile satellite communication, in this paper, a new cooperative mobile satellite\ncommunication system is proposed based on the Dynamic Space-Time Coding (D-STC). The transmitting energy of the proposed\nscheme is saved by avoiding forwarding erroneous signals in cooperative users.Meanwhile, this system benefits from diversity gains\nand the transmission is robust. Additionally, a closed-form expression of the outage probability for the proposed scheme is derived,\nand then it is demonstrated that this scheme is much better than the existing non cooperative scheme and schemes with traditional\nSTCs in the outage performance. Finally, the analytical result is supported and validated by numerical simulations.
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