PAPR Performance Analysis of Unitary Transforms in SLM-OFDM for WLAN 802.11a Mobile Terminals

  • Sukanya Kulkarni
  • B. K. Mishra
Conference paper
Part of the Lecture Notes in Networks and Systems book series (LNNS, volume 5)


A high Peak to average power is a major disadvantage in Orthogonal frequency division multiplexing (OFDM) systems since it leads to presence of severe non-linearity in the final power amplifier stage thereby reducing the power efficiency of the transmitter. Precoded Selective level mapping (SLM) OFDM using high merit factor or low aperiodic autocorrelation based phase sequence set is proposed for PAPR reduction while ensuring satisfactory modulation accuracy in WLAN mobile terminals. Further, a novel unitary transform kernel based precoding method is applied as preprocessing stage to SLM and the performance is analyzed for a 64 sub-carrier OFDM system. Simulation results show that proposed discrete cosine transform (DCT) precoded SLM achieves a PAPR of 7.3 dB at 10−3 clipping probability and error vector magnitude of 8.9%.


Unitary transform Selective level mapping (SLM) Precoding Discrete cosine transform (DCT) Peak to average power ratio (PAPR) 


  1. 1.
    A. Kangappaden, A. R. Daniel, V. P. Peeyusha, M. P. Raja, P. Sneha and A. M. V. Das. Comparision between SLM-companding and precoding-companding techniques in OFDM systems. In: International Conference on Circuit, Power and Computing Technologies (ICCPCT), Nagercoil, pp. 1–5(2016).Google Scholar
  2. 2.
    Sghaier, Mouna, Fatma Abdelkefi, and Mohamed Siala.: New SLM-Hadamard PAPR reduction scheme for blind detection of precoding sequence in OFDM systems. In: IEEE Wireless Communications and Networking Conference (WCNC)(2014).Google Scholar
  3. 3.
    P. R. Lasya and M. S. Kumar.: PAPR and out-of-band power reduction in OFDM-based cognitive radios. In: International Conference on Signal Processing And Communication Engineering Systems (SPACES), Guntur, pp. 473–476(2015).Google Scholar
  4. 4.
    Wang, Sen-Hung,: A novel low-complexity precoded OFDM system with reduced PAPR. In: IEEE Transactions on Signal Processing vol.63,no.6, pp. 1366–1376 (2015).Google Scholar
  5. 5.
    Md. Mahmudul Hasan.: VLM Precoded SLM Technique for PAPR Reduction In OFDM Systems. In: Wireless Personal Communication (2013).Google Scholar
  6. 6.
    Baig, Imran, Varun Jeoti, and Micheal Drieberg.: On the PAPR Reduction in LTE-Advanced: Precoding-Based SLM–LOFDMA Uplink Systems. Arabian Journal for Science and Engineering vol.38, no.5, pp. 1075–1086(2013).Google Scholar
  7. 7.
    Baig, Imran, Varun Jeoti.: A ZCMT precoding based multicarrier OFDM system to minimize the high PAPR. In: Wireless Personal Communications vol.68, no.3, pp. 1135–1145(2013).Google Scholar
  8. 8.
    Davis JA, Jedwab J.: Peak-to-mean power control in OFDM, Golay complementary sequences, and Reed-Muller codes. In: IEEE Transactions on Information Theory., vol.45(7), pp. 2397–417(1999).Google Scholar
  9. 9.
    Zhou, Jianqin, Ping Chen.: Generalized discrete cosine transform. In: Pacific-Asia Conference on. C.Circuits, Communications and Systems, IEEE, (2009).Google Scholar
  10. 10.
    C.H. Yang,: On Hadamard matrices constructible by circulant submatrices. Math.Comp., vol.25, pp. 181–186, (1971).Google Scholar
  11. 11.
    Seberry J, Wysocki B, A Wysocki T.: On some applications of Hadamard matrices. In: Metrika. Nov 1, vol.62(2–3), pp. 221–39, (2005).Google Scholar
  12. 12.
    Zhu, H., Gui, Z., Zhu, Y. and Chen, Z.: Discrete Fractional COSHAD Transform and Its Application. In: Mathematical Problems in Engineering (2014).Google Scholar

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© Springer Nature Singapore Pte Ltd. 2017

Authors and Affiliations

  1. 1.Sardar Patel Institute of Technology, Mumbai UniversityMumbaiIndia
  2. 2.Thakur College of Engineering and Technology, Mumbai UniversityMumbaiIndia

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