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Compensating the nonlinearity of laser diode in optical wireless transmission using OFDM

Karkhaneh, H ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. The nonlinear characteristic of an laser diode, LD, impacts on the performance of optical wireless systems using OFDM(orthogonal frequency division multiplexing). First, the influence of the nonlinear characteristic on bit-error performance is analyzed using a high power LD (LML-808.7B-XX). Next, the paper proposes a pre-distorter to compensate the nonlinearities. Finally, the coherent optical OFDM (CO-OFDM) system is considered and the performance without linearization and after linearization is analyzed via simulations in an AWGN (additive white Gaussian noise) environment. It is shown that LD nonlinearity can significantly degrade the performance. However, it is demonstrated that this degradation can greatly be mitigated by using the proposed predistortion technique
  5. Keywords:
  6. Coherent optical ofdm ; Nonlinear distortion ; Optical wireless communication ; Additive White Gaussian noise ; Bit-errors ; High-power ; Laser diode ; Non-Linearity ; Nonlinear characteristics ; OFDM (orthogonal frequency division multiplexing) ; Optical OFDM ; Optical wireless communications ; Optical wireless systems ; Optical wireless transmission ; Pre-distortion ; Predistorters ; Predistortion techniques ; Communication ; Diodes ; Frequency allocation ; Gaussian noise (electronic) ; Light transmission ; Linearization ; Optical communication ; White noise ; Wireless telecommunication systems ; Orthogonal frequency division multiplexing
  7. Source: International Conference on Data Networks, Communications, Computers - Proceedings, 3 November 2010 through 5 November 2010, Faro ; 2010 , Pages 92-96 ; 9789604742455 (ISBN)
  8. URL: http://dl.acm.org/citation.cfm?id=1948822