ArrayComm Demonstrates Major Performance and Cost Improvements in GSM and PCS Applications; Field Trials Prove Spatial Channels Technology Increases Capacity With GSM Protocols.

SAN JOSE, Calif.--(BUSINESS WIRE)--Sept. 10, 1997--ArrayComm Inc. recently announced the successful completion of both in-house tests and European field trials proving the ability of its IntelliCell technology to significantly increase system capacity and voice quality while lowering total cost per subscriber in Global System for Mobile (GSM) communications networks.

The field trials involved two major GSM protocols -- DCS-1800 (1800 MHz) and PCS-1900 (1900 MHz). GSM is the most widely deployed high-mobility wireless standard in the world, with more than 49 million subscribers.

ArrayComm's IntelliCell processing platform has not only outperformed competing technologies in direct testing of uplink (subscriber-to-base-station) performance; it is the only adaptive smart antenna technology to also demonstrate equivalent performance advantages for the downlink (base station to subscriber).

ArrayComm's powerful IntelliCell processor intelligently combines signals from antenna arrays to provide dramatic increases in signal quality, spectral efficiency and coverage over systems based on conventional wireless access technologies.

The Spatial Channels feature optimizes use of scarce and costly radio channels by simultaneously accommodating multiple users on the same radio frequency and time slot whether moving within a single cell or traveling to adjacent cells.

The result is high-capacity, high-quality access to the public network at much lower cost than other wireless technologies and, in the case of ArrayComm's IntelliWave WLL wireless local-loop system, at a lower cost than wireline installations.

ArrayComm's development of the PCS-1900 platform was partially supported by the U.S. Advanced Research Projects Agency (ARPA), with participation by Watkins-Johnson and Spectrian.

ArrayComm developed the system architecture and all of the base- station and GSM software, and provided systems integration. The IntelliCell adaptive wireless technology was shown to increase capacity and coverage. It consistently yielded more than eight times the gain of systems based on conventional antennas and interference mitigation of 20 dB, or a factor of 100.

``ArrayComm has now demonstrated its ability to enhance three different air interfaces,'' said Martin Cooper, ArrayComm's chairman and founder, ``including AMPS, PHS and GSM. In each case, the performance improvements have exceeded our expectations. IntelliCell is transparent to the air interface and will appear in other systems as they are updated.''

``We are very proud of these results,'' stated Karl Martersteck, president and chief executive officer of ArrayComm. ``This important milestone proves the ability of our technology to significantly reduce interference in GSM systems while providing support for all aspects of the air interface, including broadcast control channels.

``Such enhancements positively impact a carrier's bottom line by increasing coverage and capacity and by ensuring greater call quality. Combined with our established presence in PHS-based system solutions, these successful trials uniquely position us as a provider of low-cost, high-quality solutions for two of the fastest- growing wireless systems in the world.

``The GSM results have been achieved despite pronounced skepticism from digital-wireless-industry experts about the ability of a single technology to deliver such advantages in both uplink and downlink applications,'' Martersteck added. ``Several major GSM systems integrators are now working intently on similar adaptive solutions.''

ArrayComm is the leading global source of adaptive wireless- communications solutions. The company's revolutionary IntelliCell processing platform provides PCS, cellular and WLL operators with unparalleled increases in signal quality, capacity and coverage by automatically adapting to the complexities of the RF environment and continuously enhancing the users' signals in real time.

ArrayComm holds a number of patents on its IntelliCell technology and has applied for several more.

From the IntelliCell processor to innovative wireless local-loop systems, ArrayComm is helping make high-quality wireless communications truly affordable for mass markets worldwide.

CONTACT: ArrayComm Inc., San Jose

Christine M. Oliver, 408/952-1865

408/428-9083 (fax)

[e-mail] (e-mail)

or

McQUERTERGROUP, San Diego 

Aaron Heinrich, 619/450-0030

619/450-3140 (fax)

[e-mail] (e-mail)