Category Archives: Nyquist WDM

Signal Statistics for Nyquist WDM / OTDM

A while back I post­ed an arti­cle on Sig­nal Sta­tis­tics for OFDM. Orig­i­nal­ly, this would have includ­ed OTDM also, but it grew too long. So it was split into two parts. This is the sec­ond part. Please read the orig­i­nal arti­cle first, as it explains much of the ter­mi­nol­o­gy and the present arti­cle by itself […]

the Epic Fail of Nyquist WDM

More or less the final act of my career as an aca­d­e­m­ic researcher, I put the ideas of the post the Art of Nyquist WDM into a sub­mis­sion to Pho­ton­ics Tech­nol­o­gy Let­ters – with a few extra sim­u­la­tions and fig­ures that I thought showed the advan­tages and draw­backs of the con­cept quite well. Alas, I […]

the Art of Nyquist WDM

Nyquist WDM is a (in my opin­ion) quite promis­ing method to gen­er­ate future “super­chan­nels” with bit rates beyond 500 Gbps by con­cate­nat­ing mul­ti­ple chan­nels very close to each oth­er spec­tral­ly after fil­ter­ing each of them very, very tight­ly with a fil­ter that approx­i­mates a rec­tan­gu­lar trans­fer func­tion [1]. Even Chang Liu point­ed out (twice) at […]