Speakeasy: the military software radio
IEEE Communications Magazine
| Hi-index | 0.00 |
Interference management is a critical aspect of the design and deployment of any wireless network. Interference can reduce quality, deny service or significantly reduce the efficiency of spectrum use. Software radio holds the potential to increase the pace of innovation, flexibility and spectrum efficiency of wireless communications. Interference management is a critical aspect for devices and system design for any wireless system, and involves unique performance flexibility trade-offs for software radio design. This paper provides a review of interference management techniques by looking at two representative communications systems: cellular networks and unlicensed wireless local area networks. These two systems are chosen since they are representative of two very different types of communications networks. Cellular systems typically operate in a licensed band and have separate frequencies for transmission and reception, while 802.11b operates in an unlicensed spectrum and utilizes the same band for transmission and reception. The paper starts with a review of the fundamental interference issues and an overview of software radio systems. Following that, for each interference issue, the approaches and constraints for each standard are reviewed and the opportunities and challenges for software radio design are discussed.