We can enlarge the range of mapping region by utilizing CDMA wireless data transmission in transporting GPS difference data, and realize high precision orientation of real time.
利用CD MA无线数据传输技术传送gps差分数据可以扩大测区范围，实现高精度实时动态定位。
This work uses the RSA algorithm to doubly encrypt the conversation key in the transmission of exchanging the key, and uses the TEA algorithm in the transmission of GPS data.
在密钥交换中使用了RSA算法双重加密以传输会话密钥，会话的时候使用的是TEA算法。
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