Near-Line-of-Sight Obstruction (partial blockage)


Non-Line-of-Sight Obstruction (complete blockage)

 

Possible Solutions
Traditional solutions involve either elevating the radio or antenna above the obstruction or creating multiple paths to take the signal around the problem. Both are expensive options and they're often unavailable.

TESSCO Solution
TESSCO offers multiple solutions depending on the severity of the obstruction.

OFDM Technology
Radios using OFDM can provide a solution for a varying degree of obstructed paths. OFDM technology breaks a wideband signal transmission into independent datastreams called subcarriers and uses sophisticated error correction on the receive side to allow reliable throughput around obstructions. TESSCO provides a selection of products at different price points to overcome almost any obstructed path.

Complete blockage: Orthogon Systems
Partial blockage: Solectek

View powerful white papers from Eric Lee, President of Solectek, on the Technology and Implementation of NLOS (PDF) and on the Test Results for the Solectek SkyWay 5000 Series network (PDF).

900 MHz Frequency Radios
Unlicensed 900 band allows penetration through minimum obstructions such as foliage.

Partial blockage: Motorola Canopy

Mesh Backbone
When coverage is needed over a large area with numerous line-of-sight issues, a mesh network can provide a reliable solution that's easy to deploy. A mesh network will automatically transmit data over the shortest path or the one with the least resistance. Individual nodes may connect with several neighboring nodes to form diverse routing paths through the network. Unlike point-to-multipoint networks, meshes don’t route traffic from terminal nodes to a central hub. The diverse routing, self-configuring and self-reconfiguration features allow path changes that will redirect traffic based on the shortest, fastest, least congested or other characteristics of each path.

2.4 and 5.8Ghz freguency systems are available.

Partial blockage: Firetide