Robert C. Shapiro, P.E.

Robert C.
Shapiro, P.E.
Articles
First steps toward LMR-LTE convergence 
Understanding the similarities and differences between LMR and LTE systems is essential to figuring out how to layer them.
How to bridge the gap between LMR and wireless broadband  1
LMR may be the communications technology for today, but a private wireless broadband network could be in your organization's future. With proper planning, you can save resources — and money — while supporting both platforms.
Exploring LMR subsystems 
If the wrong pieces of equipment are designed or put into a system, it will not perform properly and resources will be seriously affected.
The data evolution continues  1
Myriad applications developed in recent decades have allowed LMR systems to shed their "voice-only" label. Meanwhile, broadband technologies like LTE promise an even brighter data future.
The advantages of close spacing
Techniques exist that enable RF engineers to locate antenna sites closer than they might otherwise think possible — which could reduce the number of sites and preserve precious resources.
Measuring radio frequency interference is key to avoiding it 1
Radio frequency interference robs the system of the ability to perform as predicted and often necessitates additional sites. But it can be measured, dramatically reducing the impact.
Transmission lines are an important element of radio system design
Transmission lines come in different sizes, are made from a variety of materials and serve a vital function. But their performance can be diminished significantly, if you're not careful.
The bane of your existence  1
Radio-frequency interference is something that every radio-system engineer will encounter, sooner or later. In this installment, we begin to explain how it occurs and what to do about it.
Now the real work begins 
Once system planning is complete, the next big task — and arguably the most arduous — is finding a suitable site.
The next piece of the puzzle 
Once the land mobile radio system is in place, the next big step is understanding how dispatch communications work.
Connecting the dots 
Once the LMR system is designed, the next big step is to link the sites, with myriad technologies available for doing so, each with distinct advantages and disadvantages.
The lynchpin 
A land-mobile radio system's ability to function effectively depends on the ability of its receivers to detect signals regardless of noise and interference.
Let's get started 
Once user needs and resources are understood, system engineering begins with RF planning.
Decisions, decisions 
The system engineer faces myriad choices before a radio technology can be selected.
The devil's in the details 
And there are plenty of them at the design-and-engineering stage of an LMR system deployment.

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