PAPR reduction and receiver sensitivity improvement in 16QAM-OFDM RoF system using DMT modulation and BTN-PS technique

Abstract In this letter, we present the generation, the peak-to average power ratio (PAPR) reduction, the heterodyne detection, the self-mixing reception, and the transmission performance evaluation of 16QAM-OFDM signals in 60 GHz radio over fiber (RoF) system using Discrete multitone (DMT) modulation and Better Than Nyquist pulse shaping (BTN-PS) technique. DMT modulation is introduced in the RoF system, in-phase and quadrature (IQ) will not be required using BTN-PS method, and the computation complexity is much lower than other published techniques for reduced PAPR in the RoF system. In the experiment, 5 Gb/s 16QAM-OFDM downlink signals are transmitted over 42 km SMF-28 and a 0.4 m wireless channel. The experimental results show that the receiver sensitivity is effectively enhanced using this method. Therefore, the introduced BTN-PS technique and its application is a competitive scheme for reducing PAPR, and enhancing the receiver sensitivity in future RoF system.

[1]  Nan Chi,et al.  Generation of 16-QAM-OFDM Signals Using Selected Mapping Method and Its Application in Optical Millimeter-Wave Access System , 2012, IEEE Photonics Technology Letters.

[2]  Zhigang Zang,et al.  Analysis of optical switching in a Yb3+-doped fiber Bragg grating by using self-phase modulation and cross-phase modulation. , 2012, Applied optics.

[3]  Sien Chi,et al.  A Full duplex radio-over-fiber linkwith Multi-level OFDM signal via a single-electrode MZM and wavelength reuse with aRSOA. , 2010, Optics express.

[4]  Minoru Okada,et al.  Bit Error Rate Performances of Orthogonal Multicarrier Modulation Radio Transmission Systems , 1993 .

[5]  Junqiang Hu,et al.  108 Gb/s OFDMA-PON With Polarization Multiplexing and Direct Detection , 2010, Journal of Lightwave Technology.

[6]  Minoru Okada,et al.  Bit Error Rate Performances of Orthogonal Multicarrier Modulation Radio Transmission Systems (Special Issue on Land Mobile/Portable Propagation) , 1993 .

[7]  Slimane Ben Slimane.  Peak-to-average power ratio reduction of OFDM signals using broadband pulse shaping , 2002, Proceedings IEEE 56th Vehicular Technology Conference.

[8]  P. Shih,et al.  Optical Millimeter-Wave Signal Generation Using Frequency Quadrupling Technique and No Optical Filtering , 2008, IEEE Photonics Technology Letters.

[9]  Xianwei Zhou,et al.  PTS-clipping method to reduce the PAPR in ROF-OFDM system , 2009, IEEE Transactions on Consumer Electronics.

[10]  Nan Chi,et al.  60-GHz RoF System With Low PAPR 16QAM-OFDM Downlink Using PTS Segmentation , 2013, IEEE Photonics Technology Letters.

[11]  Cuiran Li,et al.  Improved Nyquist windows for reduction of ICI in OFDM systems , 2011, 2011 4th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications.

[12]  Nan Chi,et al.  Novel centralized-light-source WDM-RoF system with OFDM-CPM downstream and OOK upstream , 2012 .

[13]  William Shieh,et al.  Experimental demonstration of improved fiber nonlinearity tolerance for unique-word DFT-spread OFDM systems. , 2011, Optics express.

[14]  Zhigang Zang,et al.  Theoretical and experimental investigation of all-optical switching based on cascaded LPFGs separated by an erbium-doped fiber , 2011 .

[15]  van den Hpa Henrie Boom,et al.  High-speed transmission over multimode fiber using discrete multitone modulation , 2008 .

[16]  C. Yeh,et al.  Rayleigh Backscattering Mitigation Using Wavelength Splitting for Heterogeneous Optical Wired and Wireless Access , 2010, IEEE Photonics Technology Letters.