User's Manual

Overview
Tsunami QB-8100 Series (100 Mbps/5 Mbps Models) Installation and Management Guide 12
1.2 Wireless Network Topology (Point-to-Point Link)
It is easy to set up a wireless point-to-point link as depicted in the following figure. Each device is set up as either an End Point
A or an End Point B.
Figure 1-1 Wireless Network Topology (Point-to-Point-Link)
With a point-to-point link, you can set up a connection between two locations as an alternative to:
• Leased lines in building-to-building connections
• Wired Ethernet backbones between wireless access points in difficult-to-wire environments.
1.3 Multiple-Input-Multiple-Output (MIMO)
Multiple-Input-Multiple-Output (MIMO) is a smart antenna technology that offers tremendous performance gains for wireless
devices at relatively low cost. The underlying technology of the QB-8100 radios are based on a combination of MIMO and
OFDM. High performance OFDM-MIMO radio combination enhances robustness using multiple transmitters and receivers,
allowing the QB-8100 units to completely take advantage of this antenna technology. In real-world environments, signals
reflect from various objects to reach the receiving antenna, hence a signal follows different distances before being received.
This phenomenon is called multipath propagation and causes interference and fading in non-MIMO radios. On the receiver
side, having multiple receivers increases the amount of received power and also reduces multipath problems by combining
the received signals for each frequency component separately. Hence, MIMO significantly improves the overall gain.