Two improved SLM methods for PAPR and BER reduction in OFDM–ROF systems

Abstract OFDM–ROF (orthogonal frequency division multiplexing–radio over fiber) system has high spectral efficiency and high transmission rate. However, due to the non-linear power amplifier, the high peak-to-average power ratio (PAPR) of the transmission signals is one of the major setbacks in the OFDM–ROF transmission systems. In order to reduce PAPR, this paper proposes two improved selected mapping (SLM) methods without explicit side information (SI): Proposed ED-SLM and Proposed SLM. In the Proposed ED-SLM method, signals will be transmitted without side information which is scrambled by special initial phase sequences and at the receiver an Euclidean phase distance detection (EPD) method is used to detect the SI and finishes the demodulation. In the proposed SLM method, the signals are transformed by Hadamard matrix to reduce PAPR. Then the row vectors of Hadamard matrix are used as phase sequences and superimposed on the data signals. The theory and simulation results show that the two improved SLM methods perform better in PAPR and BER reduction than the conventional SLM method in the OFDM–ROF transmission systems.

[1]  Amir K. Khandani,et al.  Integer-based constellation-shaping method for PAPR reduction in OFDM systems , 2006, IEEE Transactions on Communications.

[2]  Takeshi Hashimoto,et al.  PAPR and OOBP of OFDM and their improvement by using self cancellation codings , 2011, 2011 The 14th International Symposium on Wireless Personal Multimedia Communications (WPMC).

[3]  Jie Yin,et al.  Enabling ROF Technologies and Integration Architectures for In-Building Optical–Wireless Access Networks , 2010, IEEE Photonics Journal.

[4]  Bane Vasic,et al.  Orthogonal frequency division multiplexing for high-speed optical transmission. , 2006, Optics express.

[5]  Lin Chen,et al.  Reducing the peak-to-average power ratio with companding transform coding in 60 GHz OFDM-ROF systems , 2012, IEEE/OSA Journal of Optical Communications and Networking.

[6]  Jia-Ming Chen,et al.  Efficient PAPR Reduction in OFDM Systems Based on a Companding Technique With Trapezium Distribution , 2011, IEEE Transactions on Broadcasting.

[7]  Charalampos Tsimenidis,et al.  OFDM Based on Low Complexity Transform to Increase Multipath Resilience and Reduce PAPR , 2011, IEEE Transactions on Signal Processing.

[8]  S. Srikanth,et al.  Adaptive active constellation extension for PAPR reduction in OFDM systems , 2011, 2011 International Conference on Recent Trends in Information Technology (ICRTIT).

[9]  Jianjun Yu,et al.  PAPR reduction and computational complexity analysis of interleaved segmentation in 60GHz OFDM-RoF system , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[10]  Li Li,et al.  Joint Decoding of LDPC Code and Phase Factors for OFDM Systems With PTS PAPR Reduction , 2013, IEEE Transactions on Vehicular Technology.

[11]  Youxi Tang,et al.  Simplified Approach to Optimized Iterative Clipping and Filtering for PAPR Reduction of OFDM Signals , 2013, IEEE Transactions on Communications.

[12]  Tao Jiang,et al.  A Novel Phase Offset SLM Scheme for PAPR Reduction in Alamouti MIMO-OFDM Systems Without Side Information , 2013, IEEE Signal Processing Letters.

[13]  Yuan Ouyang,et al.  Low-complexity selected mapping schemes for peak-to-average power ratio reduction in OFDM systems , 2005 .

[14]  Hyun-Bae Jeon,et al.  A Low-Complexity SLM Scheme Using Additive Mapping Sequences for PAPR Reduction of OFDM Signals , 2011, IEEE Transactions on Broadcasting.

[15]  Sien Chi,et al.  High spectral efficient W-band OFDM-RoF system with direct-detection by two cascaded single-drive MZMs. , 2013, Optics express.