| Navigation System is a primary part of Handheld Electronic Map Task (HEMT). Navigation System plays a very important role during the design and development of HEMT.Beginning with discussion background of HEMT, this paper gives primary software design of HEMT and implemental method of HEMT based on analyzing and researching similar products home and abroad. It is discussed with emphasis of developing method, software mainframe of Navigation System and receiving & processing of GPS signal with multi-thread technology. In addition, some technologies and implementation relating to development process of Navigation System are given as well. |
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