Fig. 1. Architecture of CBV-TFNet post-equalizer.

Fig. 2. Experimental setup of UVLC system.

Fig. 3. (a) BER performance of different PBs and passband weights used by loss function. Spectra of the original, received, and NN equalized signal of (b) using PB of 723 MHz and weight of 1.0 and (c) using PB of 797 MHz and weight of 0.9.

Fig. 4. (a) Error band diagram of bitrate in continuously changing epoch using different loss function and model input. STFT spectrum of (b) received signal, (c) original signal, (d) received signal after mask.

Fig. 5. The bitrate contour plot of different working points with the post-equalizer using (a) LMS-Volterra; (b) DNN; (c) TFDNet; (d) CBV-TFNet. The bit-power loading result in the communication test with the post-equalizer using (e) LMS-Volterra; (f) DNN; (g) TFDNet; (h) CBV-TFNet.

Fig. 6. Comparison of consecutive window input and output capability of DNN based and CBV-TFNet equalizers.