RFSTUF

Interference Testing and Repercussions
Thursday, September 25, 2008  - Andrew Seybold
T-Mobile and a number of other industry companies contend that T-Mobile will suffer interference to its UMTS/HSPA system being built out on the ASW-1 spectrum (2110-2155 MHz) if someone were to build out a nationwide system as proposed by the FCC for the AWS-3 spectrum (2155-2180 MHz). The reason for concern is that ASW-1 spectrum is configured for typical cellular operation with all of the cell site's transmitters (high power with directional antennas) being in one portion of the band and the low-powered handsets that have to communicate with these cell sites in another portion of the band. The spectrum that is to be auctioned in the AWS-3 band will employ a different form of wireless where cell sites and handsets operate in the same frequency band using a time division technology. ...