Transmitter Output Factors
Communications transmitters are modeled differently depending on whether they are transmitters or re-transmitters. Technical issues related to transmitter output are discussed below.
Transmitter Output
The following table details factors related to transmitter output:
Transmitter output
| Output | Simple | Medium | Complex |
|---|---|---|---|
| EIRP | EIRPU+GpostXmt | GU + PU + GpostXmt | G + PU + GPostXmt |
where:
EIRPU is the user specified EIRP
GpostXmt is the total of the post-transmit gains and losses specified by the user
GU is the user specified antenna gain
PU is the user specified output power
G is the computed antenna gain based on the position of the receiver relative to the transmitter's coordinate system (the gain may vary as the orientation of the transmitter and receiver change over time)
Re-Transmitter Output
Re-transmitter output factors are detailed in the following table:
Re-transmitter output
| Output | Simple | Medium | Complex |
|---|---|---|---|
| fOut | F(fIn) | ... | ... |
| IBO | ΦSat - Φ | ... | ... |
| OBO | F(IBO) | ... | ... |
| EIRP | EIRPSat - OBO + GPostXmt | GU + PSat - OBO + GPostXmt | G + PSat + OBO + GPostXmt |
where:
fIn is the received frequency
fOut is the transmitter output frequency, based on an nth order polynomial function of the input frequency
ΦSat is the saturation flux density (in dBW/m2)
Φ is the received flux density (in dBW/m2)
IBO is the input back off (in dB)
OBO is the output backoff (in dB), based on an nth order polynomial function of the input backoff
EIRPSat is the user-specified saturated EIRP
GPostXmt is the total of the post-transmit gains and losses specified by the user
GU is the user-specified antenna gain
PSat is the user-specified saturated output power
G is the computed antenna gain based on the position of the receiver relative to the transmitter's coordinate system (the gain may vary as the orientation of the transmitter and receiver change over time)