High density space division multiple access: double reuse of frequency channels

This paper describes the concept of a novel approach for frequency reuse and proposes its practical use to personal communications services (PCS) in United States. The approach not only enhances the utility of enduser´s handset, by using an advanced air interface between cordless telephone and urban cellular radio, but also enhances the efficiency of the frequency channels, when compared with the conventional method of frequency reuse. The novel approach doubly reuses (DR) the frequency channels in the micro and macrocellular systems, and it is an example of high density space division multiple access (SDMA), a new notation which explains frequency utilization per unit area. DR systems will offer many benefits to nations, endusers, network vendors, and manufacturers. Considerations for the practical use of DR systems are also described