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发明授权
CN107294550B 一种基于干扰消除的时隙ALOHA系统发送与接收方法 有权

一种基于干扰消除的时隙ALOHA系统发送与接收方法
摘要：
本发明公开了属于卫星通信技术领域的一种基于干扰消除的时隙ALOHA系统信号发送与接收方法。该方法包括首先建立时隙ALOHA系统接收模型，其次是该时隙ALOHA系统接收模型的信号发送与接收的方法；其中，时隙ALOHA系统接收模型信号在发送过程中每个消息在一帧内随机选择多个时隙重复发送，不同消息随机选择不同训练序列用于接收端同步，在接收端通过相关运算估计各个消息的到达时延；最后，利用接收模型进行干扰消除，从而实现在消息发生碰撞的情况下恢复各用户消息；该方法适用于时隙ALOHA系统，如甚高频数据交换系统VDES、卫星船舶自动识别系统SAT‑AIS、卫星物联网等，可以显著提高时隙ALOHA系统的容量。
摘要（英）：

The invention discloses a slotted ALOHA system signal sending and receiving method based on interference elimination, and belongs to the technical field of satellite communication. The method comprises establishing a receiving model of slotted ALOHA, and a signal sending and receiving method for the receiving model of the ALOHA system. In a signal sending process of the receiving model of the slotted ALOHA, each message randomly selects a plurality of slots to be repeatedly sent in a frame, different messages randomly select different training sequences used for synchronization of a receiving end, and arrival time delay of each message is estimated through correlation operation on the receiving end. Finally, the receiving model is used to eliminate interference, to realize to recover each user message under the condition that message collision occurs. The method is suitable for a slotted ALOHA system, such as a very high frequency data exchange system VDES, a satellite ship automatic identification system SAT-AIS, and a satellite internet of things, and the method obviously improve capacity of the slotted ALOHA system.

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