What is hiden behind WAM technology?

I’ve been thinking a little about a new breakthrough in telecom industry presented by Magna-Com. They have said that it has 10 dB gain, comparing to the 4096-QAM. What is it? How does it work?

Before they provide more details, we can only guess and this is what the following work about.

Sections:

1. Channel capacity. 4096-QAM performance

2. How could 10 dB gain be obtained? Possible solutions

3. Conclusion

Rotated constellation demapper design

    Hi! I have been working on an OFDM demodulator. It uses rotated constellations (Q-delay, just like in DVB-T2) to improve BER performance over frequency selective channels. I am going to share my thoughts about demapping algorithm here and describe some details. You can use MATLAB code to repeat the simulation and check results by yourself.

    Here is a structure of my work:

1. Demapping. LLR calculation.
2. Rotated constellations. Q-delay.
3. Rotated constellation demapper.
1. Direct implemention
2. QRD based demapper