Abstract

This paper introduces a method for boosting the signal-to-noise ratio at the transmitter of a discrete-multitone system through reshaping of the spectrum of quantization noise and clipping distortion. This is of particular importance for high-bandwidth transmission, such as 30 GHz, where digital-to-analog converters have a very limited resolution of only 5–8 bits. This limitation of the data converters is thus significant and reducing their noise contribution has a pronounced effect on the overall system’s performance. The proposed technique resembles the quantization noise shaping of delta-sigma data converters but is a more general technique that shapes both quantization and clipping noise and it additionally does not require oversampling. The technique relies on the existence of an unused band of subcarriers, as would be the case, for example, when tone reservation is applied. The proposed system is additionally well-suited for low-power transceivers as its most computationally-expensive element is a short finite impulse response filter. In a practical setting, the noise contribution of quantization and clipping can be reduced by 6 dB.

© 2014 IEEE

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  1. W. Z. Yan, T. Tanaka, B. Liu, M. Nishihara, L. Li, T. Takahara, Z. Tao, J. C. Rasmussen, T. Drenski, "100 Gb/s optical IM-DD transmission with 10G-class devices enabled by 65 GSamples/s CMOS DAC core," presented at the Opt. Fiber Commun. Conf. Expo./Nat. Fiber Opt. Eng. Conf. AnaheimCAUSA (2013, Paper OM3H.1).
  2. J. Armstrong, "OFDM for optical communications," J. Lightw. Technol. 27, 189 -204 (2009).
  3. G. P. Agrawal, Fiber-Optic Communication Systems (Wiley, 2002).
  4. J. Tellado, Peak to average power reduction for multicarrier modulations Ph.D. dissertation Electr. Eng. Dept., Stanford Univ.StanfordCAUSA (2000).
  5. Oversampling Delta-Sigma Data Converters Theory, Design and Simulation (IEEE Press., 1992).
  6. A. Gatherer, M. Polley, "Controlling clipping probability in DMT transmission," Proc. 31st Asilomar Conf. Signals, Syst., Comput. (1997) pp. 578-584.
  7. B. S. Krongold, D. L. Jones, "An active-set approach for OFDM PAR reduction via tone reservation," IEEE Trans. Signal Process. 52, 495-509 (2004).
  8. J. Armstrong, B. J. C. Schmidt, "Comparison of asymmetrically clipped optical OFDM and DC-biased optical OFDM in AWGN ," IEEE Commun. Lett. 12, 343-345 (2008).
  9. E. Vanin, "Performance evaluation of intensity modulated optical OFDM system with digital baseband distortion," Opt. Exp. 19, 4280-4293 (2011).
  10. D. Fraser, "Interpolation by the FFT revisited—An experimental investigation," IEEE Trans. Acoust., Speech, Signal Process. 37 , 665-675 (1989).
  11. A. Oppenheim, R. Schafer, Discrete-Time Signal Processing (Prentice Hall, 2009).
  12. X. Li, L. J. Cimini, "Effects of clipping and filtering on the performance of OFDM," Proc. IEEE 47th Vehicular Technol. Conf. (1997) pp. 1634-1638.
  13. A. A. Salvekar, C. Aldana, J. Tellado, J. Cioffi, "Peak-to-average power ratio reduction for block transmission systems in the presence of transmit filtering," Proc. Int. Control Conf. (2001) pp. 175-178.
  14. A. Papoulis, S. Pillai, Probability, Random Variables and Stochastic Processes (McGraw-Hill, 2002).
  15. R. A. Horn, C. R. Johnson, Matrix Analysis ( Cambridge Univ. Press, 1985).
  16. A. J. Lowery, J. Armstrong, "Orthogonal-frequency-division multiplexing for dispersion compensation of long-haul optical systems," Opt. Exp. 14, 2079-2084 (2006).
  17. B. J. C. Schmidt, A. J. Lowery, J. Armstrong, " Experimental demonstrations of electronic dispersion compensation for long-haul transmission using direct-detection optical OFDM," J. Lightw. Technol. 26, 196-203 (2008 ).

2011 (1)

E. Vanin, "Performance evaluation of intensity modulated optical OFDM system with digital baseband distortion," Opt. Exp. 19, 4280-4293 (2011).

2009 (1)

J. Armstrong, "OFDM for optical communications," J. Lightw. Technol. 27, 189 -204 (2009).

2008 (1)

J. Armstrong, B. J. C. Schmidt, "Comparison of asymmetrically clipped optical OFDM and DC-biased optical OFDM in AWGN ," IEEE Commun. Lett. 12, 343-345 (2008).

2006 (1)

A. J. Lowery, J. Armstrong, "Orthogonal-frequency-division multiplexing for dispersion compensation of long-haul optical systems," Opt. Exp. 14, 2079-2084 (2006).

2004 (1)

B. S. Krongold, D. L. Jones, "An active-set approach for OFDM PAR reduction via tone reservation," IEEE Trans. Signal Process. 52, 495-509 (2004).

1989 (1)

D. Fraser, "Interpolation by the FFT revisited—An experimental investigation," IEEE Trans. Acoust., Speech, Signal Process. 37 , 665-675 (1989).

IEEE Commun. Lett. (1)

J. Armstrong, B. J. C. Schmidt, "Comparison of asymmetrically clipped optical OFDM and DC-biased optical OFDM in AWGN ," IEEE Commun. Lett. 12, 343-345 (2008).

IEEE Trans. Acoust., Speech, Signal Process. (1)

D. Fraser, "Interpolation by the FFT revisited—An experimental investigation," IEEE Trans. Acoust., Speech, Signal Process. 37 , 665-675 (1989).

IEEE Trans. Signal Process. (1)

B. S. Krongold, D. L. Jones, "An active-set approach for OFDM PAR reduction via tone reservation," IEEE Trans. Signal Process. 52, 495-509 (2004).

J. Lightw. Technol. (2)

J. Armstrong, "OFDM for optical communications," J. Lightw. Technol. 27, 189 -204 (2009).

B. J. C. Schmidt, A. J. Lowery, J. Armstrong, " Experimental demonstrations of electronic dispersion compensation for long-haul transmission using direct-detection optical OFDM," J. Lightw. Technol. 26, 196-203 (2008 ).

Opt. Exp. (2)

A. J. Lowery, J. Armstrong, "Orthogonal-frequency-division multiplexing for dispersion compensation of long-haul optical systems," Opt. Exp. 14, 2079-2084 (2006).

E. Vanin, "Performance evaluation of intensity modulated optical OFDM system with digital baseband distortion," Opt. Exp. 19, 4280-4293 (2011).

Other (10)

W. Z. Yan, T. Tanaka, B. Liu, M. Nishihara, L. Li, T. Takahara, Z. Tao, J. C. Rasmussen, T. Drenski, "100 Gb/s optical IM-DD transmission with 10G-class devices enabled by 65 GSamples/s CMOS DAC core," presented at the Opt. Fiber Commun. Conf. Expo./Nat. Fiber Opt. Eng. Conf. AnaheimCAUSA (2013, Paper OM3H.1).

G. P. Agrawal, Fiber-Optic Communication Systems (Wiley, 2002).

J. Tellado, Peak to average power reduction for multicarrier modulations Ph.D. dissertation Electr. Eng. Dept., Stanford Univ.StanfordCAUSA (2000).

Oversampling Delta-Sigma Data Converters Theory, Design and Simulation (IEEE Press., 1992).

A. Gatherer, M. Polley, "Controlling clipping probability in DMT transmission," Proc. 31st Asilomar Conf. Signals, Syst., Comput. (1997) pp. 578-584.

A. Oppenheim, R. Schafer, Discrete-Time Signal Processing (Prentice Hall, 2009).

X. Li, L. J. Cimini, "Effects of clipping and filtering on the performance of OFDM," Proc. IEEE 47th Vehicular Technol. Conf. (1997) pp. 1634-1638.

A. A. Salvekar, C. Aldana, J. Tellado, J. Cioffi, "Peak-to-average power ratio reduction for block transmission systems in the presence of transmit filtering," Proc. Int. Control Conf. (2001) pp. 175-178.

A. Papoulis, S. Pillai, Probability, Random Variables and Stochastic Processes (McGraw-Hill, 2002).

R. A. Horn, C. R. Johnson, Matrix Analysis ( Cambridge Univ. Press, 1985).

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