Are capacity and spectral efficiency identical for a dicrete-time digital signal?

1. What is spectral efficiency in digital communication?
2. How is spectral efficiency related to system performance?
3. How is spectral efficiency measured?
4. What is spectral efficiency in OFDM?

What is spectral efficiency in digital communication?

Spectral efficiency refers to the amount of data that can be transmitted over a specific bandwidth. You can use it to compare how efficiently two different systems utilize the same frequency.

How is spectral efficiency related to system performance?

Also known as spectral efficiency or bandwidth efficiency, a cellular network's spectral efficiency is equivalent to the maximum number of bits of data that can be transmitted to a specified number of users per second while maintaining an acceptable quality of service.

How is spectral efficiency measured?

* Spectrum efficiency is measured by bits/hz/cell, the number of bits transmitted per cell per sec per hz.

What is spectral efficiency in OFDM?

To achieve higher spectral efficiency in OFDM, high-level subcarrier modulation formats and coherent detection play a very important role. A spectral efficiency of 8.0 bit/s/Hz has been realized with 32 QAM subcarrier modulation, where a 400 Gbit/s PDM-OFDM signal was transmitted with a channel spacing of 50 GHz [62].