This patent applies spread spectrum communication technology and its unique Rake Receiver. It can receive multiple paths signals from different terrains, and compare with numerical digital map database to operate the signal receiver positioning.

This invention utilizes base station positioning by means of spread spectrum communication technology and its rake receiver, which receives  multiple paths signals from different terrains. Simulated distance is calculated from multiple signal delay and compared with a digital map. Location of the receiver is positioned at where the signal paths cross. In this invention, a base station is equipped with three transmitters which send separated 120 degrees spread spectrum signals, and support with the communication protocol that transmits their bearing angle information, thus achieves two-point positioning.

本專利與電子通信技術有關，特別係指利用展頻通訊技術，及數位化電子地圖之運用。