MURS or Multi-Use Radio Services is a newly allocated license-free spectrum. A few of the LMRS frequency has now been allocated for license-free operation.
LMRS – or Land Mobile Radio Service, is an FCC allocation of spectrum reserved just for companies – including nonprofits and local governments – but not individuals.
MURS and LMRS are similar in the amount of power (2W), and frequency (150MHz) they use. MURS is not frequency allocated – meaning you might have multiple people using the same frequency. LMRS is “frequency allocated” – meaning each person in each region is assigned a frequency that is not likely to interfere with anyone else.
The primary advantage of MURS/LMRS is its long range and low cost. Since it is very low frequency, it is especially effective in areas with lots of ground clutter and hilly terrain. The modulation scheme is significantly simpler than LoRa, so the cost is lower as well.
The primary disadvantage is coexistence – that is its ability to play nicely with other people using the same spectrum. This can be a problem with MURS in high population density (NYC for example). The frequency allocation of LMRS somewhat offsets the coexistence issue since the spectrum is “controlled”.
If you’re interested in learning more about MURS FCC regulation, you can visit the FCC’s website here: http://snip.ly/omaeq
If you’re interested in learning more about LMRS FCC regulation, you can visit the FCC website here: http://snip.ly/7b7bq
Steve Owens – CTO Finish Line PDS A Better Way for Small Companies to Develop Products
Ph: 603 880 8484