Third-generation wireless mobile communications systems solutions and key technologies
First, second-generation cellular mobile communications systems for traditional voice and low rate data services system. And in the future "information society", image, voice; data on the combination of high-speed multimedia services and business data services will exceed the volume of traditional business. Therefore the current cellular mobile communication system is not only far from being able to meet future business needs of users, and along with the surge in the number of users will also be far from enough to meet users of the development needs of passengers. In addition, as the 'information super highway "built land-based network of public transport in many businesses, will also work with mount mobile communication system. So for the next generation of mobile and personal card system that is the first king on behalf of and personal communication systems research and development of the field of telecommunications is increasingly becoming a new hot spot.
