Multi-Radio Outdoor WiFi: Increase Frequency Efficiency and Data Quality of 802.11a Multi-Radio Applications

Why Frequency Efficiency and Wireless Data Quality Are More Stringent Than Ever for Outdoor WiFi Hotspot?

Commercial off-the-shelf wifi 802.11a/5GHz equipment has attracted a good deal of attention on high-bandwidth multimedia over wifi applications from both academia and industry due to its relatively un-crowded application and high performance. Unfortunately, evidence shows that the performance of such 802.11a multi-radio and multi-hop wifi networks degrades rapidly as the number of radios or hops increases, even though the transmit and receive radios use two separate channels which can lead to 50% or worse performance degradation in data transfer. With the arrival of new multimedia devices such as the iPad or streaming media from Netflix, even minor glitches in the smooth flow of data can create major annoyances. As a consequence of increasing amount of in-band and adjacent band interferences in 802.11a outdoor multi-radio applications, appropriate design of 802.11a wifi modules with digital filtering to mitigate adjacent-channel interference to increase frequency efficiency and wireless data quality of multi-radio wifi application has become critical.

Unex’s DCMA-86 Series With Innovative Built-in Band-Pass Filter Is a Promising Solution to Increase Frequency Efficiency and Data Quality for 802.11a Multi-Radio Applications:

Unex applies 5.47 – 5.725GHz band-pass filter on DCMA-86III and 5.725 – 5.875GHz on DCMA-86II combining high rejection dielectric resonator design to mitigate unwanted interference signal. DCMA-86 series is the most promising solution for "outdoor multi-radio 802.11a nodes" and " outdoor multi-hop networking” installation for multimedia applications, especially those using antennas susceptible to surge. Precisely apply DCMA-86, DCMA-86II, and DCMA-86III can greatly improve performance of co-located 802.11a equipment as much as 300%.

Advanced Applications of DCMA-86, DCMA-86II, and DCMA-86III

1.	Today' s Dual-Concurrent WiFi Architecture
	two independent WiFi modules are used to form independent WiFi connections with 802.11b/g and 802.11a frequencies to avoid interruptions in transmission due to radio interference.
2.	Tomorrow's Multi-Concurrent WiFi Architecture
	Unex raises the bar by providing more than two WiFi modules to enable four independent WiFi connections and increase bandwidth efficiency in 802.11a deployments to better overall network performance.
	2-1.	more than two dual-concurrent AP application: use DCMA-86, DCMA-86II, and DCMA-86III in different APs to replace today's standard 802.11a WiFi modules to minimize radio interference and better overall network performance.
	2-2.	quad-concurrent AP application: use DCMA-86, DCMA-86II, DCMA-86III and a standard 802.11b/g GHz WiFi modules in a quad-concurrent AP to better overall network performance and double secure WiFi connection's reliability than dual-concurrent.

DCMA-86:
Industrial-grade, high-power 802.11a wifi mini-PCI module w/ESD and Surge Protection, AR5414A-B2B

DCMA-86II:
Industrial-grade, high-power 5.725~5.875GHz wifi mini-PCI module w/ESD and Surge Protection, AR5414A-B2B

DCMA-86III:
Industrial-grade, high-power 5.47~5.725GHz wifi mini-PCI module w/ESD and Surge Protection, AR5414A-B2B