A typical cell site will have a greater reach (blue) than it’s subscribers (green). Enter the uplink value into the green box and the downlink value into the blue box and run the calculation. If your base station can radiate for miles but your handsets cannot you have an unbalanced and inefficient network.įinally, to see this on a map, use the ‘Path loss (dB)’ output mode in CloudRF along with the ‘Custom RGB’ colour schema. Calculate the maximum allowed path loss (MAPL) by subtracting the minimum receive level from the ERP.Ī balanced network will have similar values. Calculate the minimum receive level for the BTS by subtracting the receive antenna gain from the receiver sensitivity eg. Repeat for handset (Limited to 23dBm in the UK)ģ. Calculate the total effective radiated power for the BTS tower by adding the power and antenna gain (Limited to 33dBm in the UK)Ģ. You can always add in your own gains and losses where you like to suit your needs.ġ. Here’s a simple example with the GSM900 band and without some of the other gains and losses which can complicate this for the benefit of novices. A popular question when modelling GSM / UMTS / TETRA / LTE networks is how can I show the coverage from the mobile subscribers (Uplink)? Showing a tower’s coverage (Downlink) is easy but how do you go the other way back to the tower? If you know your equipment capabilities (tower and subscribers) you can calculate link budgets for both the uplink and downlink and then use those values to perform an area prediction.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |