Solo ICS Pico Digital Relay System

RF Window, a Seoul-based company, has developed Solo – the world’s smallest digital relay, which was showcased earlier this month at CITA Wireless in Las Vegas. Solo is a plug-and-play digital relay which delivers high-quality cellular phone coverage where there are poor signal areas indoors through the use of a consumer-installable relay system that can either sit on a stand or be mounted on walls and ceilings. The device is a pico-sized intelligent digital repeater that provides optimized service with ICS (Interference Cancellation System), efficiently enhancing the WCDMA/CDMA network.

Solo Pico is the newest and smallest addition to RF Window’s line of in-building ICS (Interference Cancellation Systems) Digital Relays with integrated donor and service antenna. This model has been developed from T-1, the first version Pico ICS repeater, with an embedded antenna. Solo Pico weighs 2.5kg, is 16cm tall, and 15.5cm wide. Because of the small size of the Solo ICS Digital Relay, its service antenna is embedded. The donor antenna may be embedded or external, depending on the RF environment the unit is installed in.

Solo is an in-building unit that RF Window reports “provides high quality voice and data coverage anywhere, from SOHO to large commercial buildings and even underground.” The Solo ICF Pico Digital Relay System supports W-CDMA, HSPA, CDMA, and EV-DO with GSM support on the roadmap. ICS repeaters are linked with the base station wirelessly so that no fiber optic cable (or the associated construction) is necessary in the installation and use of this relay system.

The patented ICS technology that RF Window uses has changed the way frequency is transmitted. Unlike common RF repeaters, ICS systems, like those employed by Solo Pico, operate outdoors without oscillation problems, and indoors without requiring antenna separation. The ICS functions using DSP (Digital Signal Processing) technology that recognizes each feedback signal and creates an equal and opposite signal in real-time.

The ICS system is able to effectively eliminate all multi-path signals, including direct feedback from the coverage antenna, indirect feedback from predictable obstacles (such as buildings, bridges, mountains), and can now even cancel indirect feedback from unpredictable obstacles (e.g. pedestrians, vehicles, trees) despite changes in feedback signal timing and amplitude.

Seong Jae Lee, Chairman of RF Window, reports that “positive trial feedback from over 30 wireless operators confirms that Solo provides the coverage and quality improvements that carriers need in their last mile network. With 25,000 commercial relays in live cellular step networks, our ICS is field-proven.” According to the company, field trials have already been conducted in South Korea, Japan, Taiwan, Argentina, Singapore, Belarus, Ukraine, Russia, England, and Spain.

TFOT has previously covered other stories on communication systems, including one on conference-call communication across a 300,000 square feet area using a Bluetooth mobile conferencing system. TFOT also covered a miniature Radio Frequency Identification (RFID) chip in the article “World’s Smallest RFID Chip,” and a story on cancer treatment with radio frequency waves, in “Directed Radiotherapy Using Carbon Nanotubes.”

More information on Solo can be found at the company’s website.

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