User Guide

PMP 450 Planning Guide
Overview of PMP 450
This section introduces the key features, typical uses, product variants and components of the PMP 450.
Purpose
Cambium PMP 450 Series networks are designed for wireless point-to-multipoint links in the unlicensed 2.4
GHz, 3.5GHz, 5.4 GHz and 5.8 GHz bands. Users must ensure that the PMP 450 Series complies with local
operating regulations.
The PMP 450 Series adds dramatically increased network throughput and capacity. The PMP 450 Series
enables network operators to grow their business by offering more capacity for data, voice and video
applications.
Key features
The Cambium PMP 450 Series offers the following benefits:
• Cambium’s highest performing point-to-multipoint solution, with up to 90 Mbps usable throughput
• State-of-the-art MIMO (Multi-In Multi-Out) technology
• Better spectral efficiency than other MIMO alternatives
• Efficient GPS synchronized, scheduled TDD operation for easy Access Point site deployment and
performance that is consistent regardless of subscriber loading
• A range of cost-effective subscriber device solutions to meet the business case of any network application
• MIMO Matrix B: This technique provides for the ability to double the throughput of a radio transmission
under proper RF conditions. Different data streams are transmitted simultaneously on two different
antennas.
nLOS benefits and limitations
In addition to providing LOS (Line-Of-Sight) connectivity, use of OFDM technology can provide nLOS (near
Line-Of-Sight) connectivity and sometimes NLOS (Non-Line-Of-Sight) connectivity:
• LOS: the installer can see the AP from the SM and the first Fresnel zone is clear.
• nLOS: the installer can see the AP from the SM, but a portion of the first Fresnel zone is blocked.
• NLOS: the installer cannot see the AP from the SM and a portion or even much of the first Fresnel zone is
blocked, but subsequent Fresnel zones are open.
pmp-0047 (March 2014)
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