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i want to do phd . can u please suggest me any latest topic on optical ofdm or optical wdm . I want to work on matlab.loking for ur suggestions

OFDM simply means orthogonal frequency division multiplexing. It is a technique which is used to reduce the error in signal transmission and to increase the efficiency of cable.
Some of the most recent topic which comes under OFDM are as below:--->>
1.SCFDM
2.WCDMA
3.OPTICAL FIBRE
4.OFDMA
5.FDM
6.TDMA

Ans many more topics are there to study. And OFDM can be a very good and recent to make a project in field of electronics and communication.
The main advantage of OFDM are low Bit Error rate having a very high rate of data transmission.
If you are interested to get more detaiils OFDM then please take the help of following books like.
1.Data communication network.
2.Digital signal Processing.
3.Signal and system.
4.Digital communication
5.Optical fiber communication.

If you have a internet facility then please take the help of Youtube to take the online classes.

OFDM simply means orthogonal frequency division multiplexing. It is a technique which is used to reduce the error in signal transmission and to increase the efficiency of cable.
Some of the most recent topic which comes under OFDM are as below:--->>
1.SCFDM
2.WCDMA
3.OPTICAL FIBRE
4.OFDMA
5.FDM
6.TDMA

Ans many more topics are there to study. And OFDM can be a very good and recent to make a project in field of electronics and communication.
The main advantage of OFDM are low Bit Error rate having a very high rate of data transmission.
If you are interested to get more detaiils OFDM then please take the help of following books like.
1.Data communication network.
2.Digital signal Processing.
3.Signal and system.
4.Digital communication
5.Optical fiber communication.

If you have a internet facility then please take the help of Youtube to take the online classes.