Software Radio in Wireless Applications:A Revolution through Software

摘要

Wireless communications infrastructure manufacturers have traditionally developed single-standard, high-power, high-capacity networks to address the need for cellular coverage over large areas. These networks were intended to support a specific wireless standard and run for ten or more years in order to provide a reasonable return on investment before requiring upgrade. As the need for wireless communications continues to increase, new wireless standards are appearing, the number of licensed frequency bands is multiplying, and the pace of innovation is accelerating faster than ever. Since the cost to implement a dedicated network for each new standard is so high, carriers are looking for ways to increase their capabilities in order to support different wireless standards without duplicating their infrastructure investment. Furthermore, smaller carriers, as well as carriers with remote coverage areas, are looking for ways to cost-effectively introduce new technologies and functionality in order to stay competitive and generate new roaming revenue opportunities.