josh gerst

CTS 050: Introduction To DAS with Josh Gerst

Josh Gerst and I talk about an introduction to DAS, distributed antenna systems.

Welcome back Josh Gerst, Vice President of Engineering at RF Connect. He originally came on the show back in episode 27 and he’s back to talk more about DAS.

DAS stands for Distributed Antenna System where you take RF from one location and convert it to light over fiber so it could be distributed throughout a facility.

There are many moving parts to consider in a DAS. Some systems use CAT6 cabling and there are traditional DAS systems which use hybrid fiber coax. The hybrid fiber coax method takes multiple RF sources which could be multiple frequency bands. The headend would be used for RF consolidation.

Another system is a multi-sector DAS which is used for capacity. These systems often have 3 sectors where each sector is independent and each sector has different scrambling codes.

Without getting too far into the weeds and keeping this as an introduction to DAS we talk about stadium deployments. Usually multiple sectors are used in these environments due to capacity reasons. A sector may serve 1 or 10 remote units of 20W or 40W. That’s far from an introduction to DAS but it gives you insight into how this can scale.

One thing you cannot overlook with DAS is public safety. E911 is configured for sectors in a tower. Generally phones will log in their GPS on the tower which is then reported to assisted GPS. Public safety generally uses lower frequencies because of the penetration into buildings so we wont typically see it on the Wi-Fi frequencies.

For more of an introduction to DAS, check out RF Connect online and view a couple of videos found online here and here.

CTS 027: Josh Gerst on Outdoor Wireless and DAS

Girl walking downtown

Josh Gerst, Vice President of Engineering at RF Connect, joins me on the podcast today to talk about outdoor wireless and DAS. He has over 15 years in RF engineering. His previous experience comes from a small smart antenna startup called Metaware, Sprint, Powerwave, to Ericsson, a large wireless equipment OEM.

He goes into how he got his start in wireless and his experience working at various RF related positions at different companies.

Today he is the VP of Engineering at RF Connect and he provides insight into how he and his team works on configuring wireless systems for different cities such as public WiFi over 12 square miles in Michigan.

Some of the same kind of issues we see in WiFi are a little different when doing WiFi outdoors such as trees and hills. Josh goes into how they add this data into their surveys.

Josh provides a comparison between WiFi and DAS and why one may be used over the other. When deploying either system, Josh talks about how to achieve success by gathering the scope of work and requirements.

You can find more about RF Connect from their website, LinkedIn, and Twitter.

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