Mimosa Backhaul Help Content
Mimosa Backhaul Collocation
Copyright © 2014 Mimosa Page 36
Integrated GPS and GLONASS Receiver
Product Applicability: B5/B5c, B11
The B5, B5c and B11 include an integrated receiver that receives signals from both GPS and GLONASS satellites.
This effectively doubles the number of available satellites to obtain a lock over a pure GPS receiver. The receiver is
able to provide accurate latitude and longitude information that you may use in conjunction with Mimosa Cloud
Services to show the position of your devices overlaid on a map for planning and management purposes.
The GPS/GLONASS receiver is also required for timing synchronization to allow TDMA timing slots to operate
correctly between devices. GPS timing alone is not sufficient to achieve this, as over time the accuracy is
compromised and synchronization between devices will drift. To ensure reliable time synchronization, the product
includes a GPS-Disciplined Oscillator (GPS-DO) with 3 ppb (parts per billion), or 40 ns accuracy. This allows devices
to stay synchronized from a timing perspective without requiring any form of communication with nearby radios or
to the cloud. This also means that even if there are multiple users of Mimosa radios in a single site, that these can
also be synchronized for TDMA operation.
Note that the B5-Lite does not include a GPS receiver.
Collocation with Other Radios
Product Applicability: B5/B5c, B11
What are the guidelines for collocation with other Mimosa radios?
Up to four (4) Mimosa B5, B5c or B11 radios are designed work together on the same tower, even on the same
channel(s), because they are synchronized via GPS. We recommend 80-90° angular separation and equal Rx power
per site for maximum performance.
Can I collocate at a site where Mimosa radios are on separate towers?
Yes, all Mimosa radios at the same site (even on separate towers) can be collocated and share frequencies so long
as they are configured with the same TDMA settings.
What are the guidelines for collocation with non-Mimosa radios?
Other non-Mimosa radios on the same tower may not use GPS synchronization in the same way, or at all, so some
general rules of thumb apply. Ensure three meters (or ten feet) of physical separation, greater than 30° angular
separation, and 20-30 MHz of frequency separation depending on the PSD mask of the neighboring radio. The B5's
built-in Spectrum Analyzer can be used to select channels with the lowest amount of noise.
Can Mimosa synchronize with non-Mimosa radios?
No, Mimosa radios do not synchronize with any non-Mimosa radios.
To Next Page
Loading...
Need help?
General
