yashar
Junior Member level 2
Hello
I have modeled a 4FSK modulator whit modulation index (h=2) in VSS in order to analyze its BER. But I am totally confused by Energy per symbol (Es) interpretation. I have set the OUTLVL=0 and OLVLTYP to Energy Symbol (dB). The DRATE is 500 and the SMPSYM is set to 16. So it means that there are 16 samples for every FSK symbol. The measured power at the output of TX is 125mW. As I know, I should multiply the signal power (125 mW) by the symbol duration (1/500=2mS) to obtain the symbol energy which will be 0.00025. But it is not equal to the defined amount at OUTLVL= 0 dB =1.
The help of VSS says that the symbol energy has the following relation with the signal amplitude:
and the signal amplitude has the following relation with signal power while Z0=50 ohm.
I will be so grateful If anybody can help me to understand the right interpretation of energy per symbol.
I have modeled a 4FSK modulator whit modulation index (h=2) in VSS in order to analyze its BER. But I am totally confused by Energy per symbol (Es) interpretation. I have set the OUTLVL=0 and OLVLTYP to Energy Symbol (dB). The DRATE is 500 and the SMPSYM is set to 16. So it means that there are 16 samples for every FSK symbol. The measured power at the output of TX is 125mW. As I know, I should multiply the signal power (125 mW) by the symbol duration (1/500=2mS) to obtain the symbol energy which will be 0.00025. But it is not equal to the defined amount at OUTLVL= 0 dB =1.
The help of VSS says that the symbol energy has the following relation with the signal amplitude:
and the signal amplitude has the following relation with signal power while Z0=50 ohm.
I will be so grateful If anybody can help me to understand the right interpretation of energy per symbol.
