Title :
Performance limits on M-QAM transmission in hybrid multichannel AM/QAM fiber optic systems
Author_Institution :
Commun. Syst. Technol. Lab., Panasonic Technol. Inc., Princeton, NJ, USA
Abstract :
Performance limits on M-QAM transmission in hybrid multichannel AM/QAM (amplitude modulated/quadrature amplitude modulated) fiber-optic systems are presented. It has been shown that for such hybrid analog/digital transmission over an optical fiber, the induced in-band clipping noise will significantly degrade the reception performance of M-QAM signals. Here the author determines the channel capacity and signal power (or optical modulation index) of M-QAM as limited by the presence of the clipping noise, which is non-Gaussian and impulsive, and discusses design tradeoffs for M-QAM channels in such cases.<>
Keywords :
amplitude modulation; channel capacity; optical links; optical modulation; random noise; M-QAM channels; M-QAM signals; M-QAM transmission; amplitude modulated; channel capacity; clipping noise; design tradeoffs; hybrid analog/digital transmission; hybrid multichannel AM/QAM fiber optic systems; impulsive; induced in-band clipping noise; nonGaussian; optical fiber; optical modulation index; performance limits; quadrature amplitude modulated; reception performance degradation; signal power; Bit error rate; Channel capacity; Degradation; Gaussian noise; Laser noise; Noise shaping; Optical fibers; Optical modulation; Optical noise; Quadrature amplitude modulation;
Journal_Title :
Photonics Technology Letters, IEEE
