xGTM Technology, LLC moved its promising spectrum sharing technology out of the lab and into the field, successfully conducting its first long-range wireless tests of xMax – a novel radio frequency (RF) signaling technique that represents an entirely new approach to the problem of spectrum overcrowding.
Using only a VHF paging channel and negligible power in adjacent sidebands, an xMax transmitter and receiver pair with ground level antennas delivered data to the xMax receiver over a mile away. Ground level testing presents an extraordinary challenge: the signal must travel through buildings and other obstacles without significant loss or distortion — a feat that more common microwave-based wireless broadband techniques have difficulty achieving.
Transmitting at .0005 Watts, xMax was able to demonstrate range orders of magnitude farther than other broadband technologies such as Wi-Fi. By comparison, typical performance of a Wi-Fi 802.11 hotspot at 1 Watt (or 2,000 times more power than xMax) using ground level antennas is approximately 300ft under similar non-line of sight (NLOS) conditions. “Demonstrating that broadband wireless communications can occur at such micro-power levels in the presence of interfering signals overturns long-held industry ideas,” said Joe Bobier, President of xG Technology, LLC and inventor of the technology. “What is really exciting, however, is that xMax’s unique signal profile is a perfect fit for low frequency channels that have been previously unsuitable for wireless broadband.”
Later this year, xG will release reference designs for sub-Gigahertz fixed wireless base stations and consumer premise equipment (CPE) based on current working prototypes that could outstrip the capabilities of technologies like WiMAX.