Closed-Form Expression for BER of CE-OFDM in Optical Intensity-Modulated Direct-Detection Systems

A closed-form expression for the bit-error-rate (BER) of constant envelope orthogonal frequency division multiplexing (CE-OFDM) in intensity-modulated direct-detection optical systems is provided in this letter. To the best of our knowledge, this letter is the first that provides an expression of the BER that considers the impact of electrical phase modulation index, signal bandwidth, optical modulation index, and Mach–Zehnder modulator bias point. Simulation and experimental results are included to validate the accuracy of the expression, subject to an analysis of the impact of electrical phase modulation index and the level of subcarrier mapping. With the analytical expression, we are able to reduce the computation time in design and parameter optimization of optical systems based in the CE-OFDM.

[1]  Reginaldo B. Nunes,et al.  Experimental validation of a constant-envelope OFDM system for optical direct-detection , 2014 .

[2]  Reginaldo B. Nunes,et al.  Transmission of CE-OFDM Signals Over MMF Links Using Directly Modulated 850-nm VCSELs , 2015, IEEE Photonics Technology Letters.

[3]  Tiago M. F. Alves,et al.  Experimental Demonstration of a Direct-Detection Constant Envelope OFDM system , 2010 .

[4]  W. Rosenkranz,et al.  Impact of Modulator Bias on the OSNR Requirement of Direct-Detection Optical OFDM , 2009, IEEE Photonics Technology Letters.

[5]  M. E. V. Segatto,et al.  A PAPR reduction technique based on a constant envelope OFDM approach for fiber nonlinearity mitigation in optical direct-detection systems , 2012, IEEE/OSA Journal of Optical Communications and Networking.

[6]  J. Kahn,et al.  Optimized Dispersion Compensation Using Orthogonal Frequency-Division Multiplexing , 2008, Journal of Lightwave Technology.

[7]  Reginaldo B. Nunes,et al.  Impact of Optical Power in the Guard-Band Reduction of an Optimized DDO-OFDM System , 2015, Journal of Lightwave Technology.

[8]  James R. Zeidler,et al.  Constant Envelope OFDM , 2008, IEEE Transactions on Communications.

[9]  James R. Zeidler,et al.  Noncoherent Reception of Constant Envelope OFDM in Flat Fading Channels , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.

[10]  Char-Dir Chung,et al.  Spectral precoding for constant-envelope OFDM , 2010, IEEE Transactions on Communications.