Intelligent antennas for wireless communications - Uplink

Intelligent antennas have long been recognized as a method of improving the performance and capacity of wireless systems. However, only recently have they begun to make the move from research labs to product lines. As an example, Lucent Technologies recently included a two-branch intelligent antenna (TBIA) in its enhanced digital radio unit product for time division multiple access (TDMA) systems. This paper describes the gains associated with various intelligent antenna techniques for both TDMA and code division multiple access (CDMA) cellular systems. Additionally, we describe recent research and prototyping efforts within Bell Labs.