Wireless service continued to be touch and go yesterday because a number of wireless antenna sites had either been damaged or destroyed.
Those services will use higher frequencies to transmit larger amounts of data over shorter distances, requiring more antenna sites, he said.
For public utility installations in built-up areas, radio communication is usually ruled out by the difficulty of finding antenna sites and unobstructed line-of-sight radio paths.
In New York, the collapse of the towers took out a big telephone switch and nearly a dozen cellular antenna sites in Lower Manhattan, but that was only part of the problem.
As wireless communication continues to grow, communities, independent scientists and neighborhood advocates must be involved in policy-making as much as the industry, which spends millions lobbying to prevent legislation -- even something as basic as a public list of antenna sites -- and marketing its products while dismissing the risks.
The measurements use simultaneous transmissions from three single antenna sites to a moving terminal.
The antenna sites process the radio frequency (RF) signals and convert signals from analog to digital and vice versa.
In these building roofs scenarios, the virtual simulation process of telecommunications antennas sites based on the created 3D digital scenario is very useful to optimize the location before the installation process.
A software-defined radio (SDR) cloud comprises a set of distributed antenna sites that connect to one or several data centers through low-latency and high-bandwidth communication links.
Construction of the antenna site has started, and the mast is due to be mounted in two years' time and to start operating in 2004.
"Obviously, the issue of towers can be contentious when people want services but don't want the facilities," said Jackie McCarthy, a spokeswoman for PCIA — the Wireless Infrastructure Association, which lobbies for the tower and antenna siting industry.
