Maximize Spectral Efficiency with GPS Synchronization

By    September 13, 2013

One of the secret sauces in any communications network is effective synchronization. Things that we take for granted in our everyday lives like call hand-off between cellular sites can’t be achieved without a frequency-synchronized network.

Multiple Cambium Networks access points stationed on one tower effectively use limited spectrum through GPS synchronization

A synchronized network is also essential for network planners as they design their networks to manage spectral efficiency to leverage and re-use available frequency channels, maximize available throughput and ensure end-user satisfaction.

Here’s an example that showcases the benefits of a synchronized vs. non-synchronized networks: Let’s say you’re a service provider operating in a five-square-mile (~13 square kilometers) greenfield environment using 45 MHz of available spectrum.You could expect to see 400 Mbps of data availability in that region vs.150 Mbps with a non-synchronized network.  In such a scenario, you could also expect to serve two to four times the number of users with the synchronized system.The reason for this performance difference is that in a synchronized network, you can run four sectors on two channels.  With no synchronization, you can only use one of the channels.Synchronization helps to mitigate inter-cell interference and make best use of the available spectrum in the area.

In a noisy environment with limited spectrum, a GPS-based solution is key to ensuring maximum performance from your system.   Spectrum, as we all know, is a finite resource and we need to be as efficient as possible with what we have available.

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