An approach to the RF-LSI design for ubiquitous communication appliances

We propose a ldquowide area ubiquitous networkrdquo as a highly economical and convenient wireless system for providing a wide variety of services. Its basic feature is ldquowide coverage using ultra low power consumption terminals,rdquo and its specific target is a ldquo5-km cell radius using 10-mW transmission power terminals run on ten-year life batteries.rdquo In this paper we explain the wireless specifications and the low power consumption performance required of wireless terminals used in these ubiquitous networks. We then introduce a design method that harmonizes RF and digital components and an ultra low power consumption LSI design that make it possible to satisfy these requirements.