Question: In the context of 3GPP conformance testing for User Equipment (UE) / Mobile Station (MS), how is the Total Radiated Power (TRP) alternatively calculated in an isotropic Rayleigh fading environment?
Option 1: By integrating the power transmitted in all directions over a single radiation pattern.
Option 2: Through direct measurement of maximum power output at a single antenna point.
Option 3: By analyzing the UE's/MS's circuit board design for theoretical maximum power output.
Option 4: From statistically distributed samples of total power transmitted, calibrated against a reference power transfer function.
Explanation: In an isotropic Rayleigh fading environment, accurately measuring TRP directly is complex due to multipath effects. Instead, TRP can be effectively calculated by sampling the radiated power across various field combinations, averaging these samples (proportional to the TRP), and calibrating this average against a known reference power transfer function to obtain an absolute TRP value, accounting for environmental factors and equipment losses.