Title :
Using precoding technique to reduce the BER penalty of an M-QAM channel in hybrid AM-VSB/M-QAM subcarrier multiplexed lightwave systems
Author :
Chiang, Pi-Yang ; Hsiao, Cherng-Chyi ; Way, Winston I.
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
We propose and verify through computer simulations the use of a precoding technique to eliminate the nonlinear distortions in an M-QAM channel, which is transported along with multiple AM-VSB channels by a laser diode. We show that the precoding technique can completely remove the clipping-induced bit-error-rate (BER) floor at a cost of a 3-dB signal-to-noise ratio reduction.
Keywords :
encoding; optical fibre networks; optical fibre subscriber loops; optical modulation; optical noise; quadrature amplitude modulation; subcarrier multiplexing; television networks; BER penalty reduction; M-QAM channel; clipping-induced bit-error-rate floor; computer simulations; hybrid AM-VSB/M-QAM subcarrier multiplexed lightwave systems; laser diode; multiple AM-VSB channels; nonlinear distortions; precoding technique; signal-to-noise ratio reduction; Band pass filters; Bit error rate; Chromium; Circuits; Delay; Diode lasers; Dynamic range; Low pass filters; Nonlinear distortion; Transfer functions;
Journal_Title :
Photonics Technology Letters, IEEE
