First post - I hope I have found the right subforum.
After some years working in the field (antenna / radio link installation) I am finally studying for my degree.
In one of the courses we are to make a calculated model of the RF powerdensities encountered in a urban setting with a number of BTS (Base Transceiver Station = cell phone antenna masts) nearby.
The required calculations are rather easy, as the models only are to include free space loss and no attenuation from topological features or buildings.
We are to base the calculations upon EIRP-values from the link budgets described in:
Holma, H. & Toskala. A. 2009. LTE for UMTS: OFDMA and SC-FDMA based radio access. John Wiley & Sons
Holma, H. & Toskala. A. 2010. WCDMA for UMTS: HSPA Evolution and LTE. John Wiley & Sons
(As it probably would be a copyright infringement to include a scan of the relevant pages I have found a website which references most of the link budget values from the two books. The URL is:
https://sites.google.com/site/lteen...ng-and-rf-planning/lte-link-budget-comparison )
However, one of the other students in my project group has a very different understanding of EIRP than I have. He is fully convinced that the EIRP-values in the link budgets are given per antenna cluster, not per antenna.
(Most BTS-installations (at least around here) are made with tree antennas, each covering 120 degrees. This means that each antenna cluster (consisting of three antennas) cover 360 degrees.)
In all of the antenna installations I have made (albeit radio links, not BTS) EIRP was always understood to be calculated/declared per antenna, not per system or per antenna cluster.
I am pretty sure that my understanding of the EIRP concept is correct - that EIRP always is per antenna, but I cannot (despite a couple of days searching) find any sources (online or in the library) which clearly settles the issue.
The professor teaching the course is on holiday, so I cannot get any help there.
Any help is greatly appreciated! Especially a reference to some authoritative material which clearly settles the issue.
After some years working in the field (antenna / radio link installation) I am finally studying for my degree.
In one of the courses we are to make a calculated model of the RF powerdensities encountered in a urban setting with a number of BTS (Base Transceiver Station = cell phone antenna masts) nearby.
The required calculations are rather easy, as the models only are to include free space loss and no attenuation from topological features or buildings.
We are to base the calculations upon EIRP-values from the link budgets described in:
Holma, H. & Toskala. A. 2009. LTE for UMTS: OFDMA and SC-FDMA based radio access. John Wiley & Sons
Holma, H. & Toskala. A. 2010. WCDMA for UMTS: HSPA Evolution and LTE. John Wiley & Sons
(As it probably would be a copyright infringement to include a scan of the relevant pages I have found a website which references most of the link budget values from the two books. The URL is:
https://sites.google.com/site/lteen...ng-and-rf-planning/lte-link-budget-comparison )
However, one of the other students in my project group has a very different understanding of EIRP than I have. He is fully convinced that the EIRP-values in the link budgets are given per antenna cluster, not per antenna.
(Most BTS-installations (at least around here) are made with tree antennas, each covering 120 degrees. This means that each antenna cluster (consisting of three antennas) cover 360 degrees.)
In all of the antenna installations I have made (albeit radio links, not BTS) EIRP was always understood to be calculated/declared per antenna, not per system or per antenna cluster.
I am pretty sure that my understanding of the EIRP concept is correct - that EIRP always is per antenna, but I cannot (despite a couple of days searching) find any sources (online or in the library) which clearly settles the issue.
The professor teaching the course is on holiday, so I cannot get any help there.
Any help is greatly appreciated! Especially a reference to some authoritative material which clearly settles the issue.