This paper presents in detail an outer‐coding proposal for long GNSS messages disseminated by multiple satellites. The proposal minimizes the message reception time, or Time To Retrieve Data (TTRD), over a page erasure channel in most types of environments and visibility conditions. A message M consisting of k pages is encoded into a set C consisting of n pages, such that when any subset C′ of C of k pages is correctly received, the message can be decoded. The scheme vertically encodes each page symbol in a separate high‐parity Reed‐Solomon code and allocates different parts of it to different satellites. The scheme has been designed for the Galileo High Accuracy Service (HAS), but it can be used for longer messages and other constellations. The performance results show TTRDs on the order of few seconds, at a very low decoding complexity for the receiver.

中文翻译：

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用于长GNSS高精度消息的高奇偶校验垂直Reed-Solomon码

本文详细介绍了由多个卫星传播的长GNSS消息的外部编码建议。该提议在大多数类型的环境和可见性条件下，通过页面擦除通道将消息接收时间或检索数据时间（TTRD）最小化。由k个页面组成的消息M被编码为由n个页面组成的集合C，这样当k个C的任何子集C '正确接收页面，可以对消息进行解码。该方案以单独的高奇偶校验Reed-Solomon码对每个页面符号进行垂直编码，并将其不同部分分配给不同的卫星。该方案是为伽利略高精度服务（HAS）设计的，但可用于更长的消息和其他星座。性能结果显示，TTRD大约为几秒钟，对于接收机而言，解码复杂度非常低。