Hi Alistu,
I am not asking about the shannon channel limit for a optical fiber system, I want to compare the above modulation format in terms of bit rate, so can you tell me what are the factors that governs the bit rate in any of the modulation scheme, taking same input bit pattern. I agree to you that u mentioned “Researchers are constantly trying to achieve higher bit rate-distance product using methods such as channel estimation and equalizers.”. Thanks for the reply.
Regards,
Dhiman