In recent years, the adoption of Wi-Fi for outdoor applications, including 3G Data offload, broadband wireless access, municipal deployments, Video surveillance and multimedia services is expanding. However, delivering Wi-Fi service outdoors in the highly interfered 2.4 GHz band is challenging due to high noise levels, which adversely affect the capacity, range and Quality of Service (QOS). Traditional Wi-Fi infrastructure equipment, which was developed for indoor use is incapable of rising to the outdoor challenge.
GoNet Systems Wi-Fi access points use the company’s powerful xRF™ beamforming technology, which is specifically designed for optimal performance in harsh, outdoor environments.
Multiple RF Chains
How it works
GoNet Systems xRF™ DSP implementation detects the packet direction-of-arrival within the first 2µs. This information is used to “lock” the antenna array on the signal i.e. form a single, narrow beam, directed according to the direction-of arrival by combining the signals of 4 different antennas.
GoNet Systems beamforming benefits:
- Interference mitigation
Omni systems is receive interferer sources with same gain as the user’s signal. In xRF™beamforming, interferer sources from the side lobes are received in average 20dB (1%) the power of the user’s signal. This capability provides highly effective, interference immunity.
- Inter-cell interference
The narrow beam delivered by GoNet Systems access points pollute the air much less than regular Aps, which transmit to all directions. In the 2.4Ghz band only 3 non-overlapping channels exist. Dense deployments of standard APs create high levels of noise pollution and reduce the total system capacity due to interference between adjacent cells.
- Resistance to fading
One of the major issues limiting the performance of outdoor Wi-Fi is the “fading” phenomena – where signals reflected from buildings and objects are combined destructively and degrade the signal quality. GoNet Systems xRF beamforming solution is resistant to fading and provide 5-8dB extra gain in such environments.
- Higher antenna and array gain
xRF™ beamforming systems have antenna gain of 14-17dBi compared to less than 8dBi for standard omni radios. Combined with the diversity gain, xRF beamforming provides x2-x4 range and capacity. As a result, GoNet Systems deployments require 25% access points and sites in order to cover the same area.
- Transmit power
Certifications enable beamforming systems to transmit higher power.