Optical OTSM signal detection using RNN-based QRM-MLD for optical Rayleigh channels. - Kumar, Arun; Ahmad, Sharifah Sakinah Syed; Revathi, Venkatachalam; Masud, Mehedi; Gaur, Nishant; Nanthaamornphong, Aziz (EURASIP Journal on Advances in Signal Processing, 2026)