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PHS personal mobile communication system developed by Japanese standards public wireless communications applications , with the current widespread use of narrow-band GSM and CDMA belong to the second generation of mobile communication systems. In 1995 , the Japanese telecom carriers and major communications companies jointly developed the PHS system was put into commercial operation. 1997 , PHS after entering China , the rapid development momentum , the user rapid growth , as of the end of December 2004 , the number of users has reached 65 million . Currently, there are over 10 countries around the world and regions PHS services , PHS technology and concept has been widely accepted. First, the article describes the origins and history of the PHS system in the development of all regions of the world , analyzes the PHS system's technical characteristics and advantages, and its business development in the domestic situation . Depth study of the basic concepts of the PHS system and working principle , the basic framework for the PHS system , the air interface , protocol layer and signal processing are analyzed in detail . Secondly , the paper PHS mobile technology in depth research, introduces the basic functions of PHS mobile station requirements, analysis of the mobile station origination, termination , switching and other business control processes discussed in the wireless Internet access, short message, location-based services and other value-added business applications, gives the mobile station test technical indicators. Next, this paper introduces a Renesas M64174 chip implementation PHS mobile station to Renesas program as a platform for the hardware and software systems analysis and design , elaborated baseband chip , RF module, memory management module , power management module , an audio processing module and human-machine interface hardware part of the work principles and typical circuit design, software system discussed the overall framework and implementation methods are given PHS mobile application examples , analyze and prove the design mode the feasibility and practicality. And proposed solutions in the UIM Renesas dual-mode phones and feasibility of implementation. Finally, prospects of PHS 3G mobile technology in the future development trend of the times .
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