4-PSK and 4-QAM in FSO Links
Hi everyone,
I have designed an OFDM-based FSO lnk. 4-QAM and 4-PSK modulation schemes are the same, since both have same constellation graph. Then why does 4-QAM performs better than 4-PSK in terms of BER of the received signal at the same system and link parameters in my project? I am attaching the .osd file of my system.
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