Acta Metallurgica Sinica(English letters)

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Deepen spectrum notch and reduce PAPR in OFDM systems via combining subcarriers precoding with tone reservation


  • Received:2010-10-20 Revised:2011-02-22 Online:2011-06-30 Published:2011-06-13
  • Supported by:

    National Science and Technology Major Projects


In orthogonal frequency division multiplexing (OFDM) systems, spectrum notch can be generated to mitigate interference to other narrow-band services by turning off corresponding subcarriers. However, the inter-carrier interference may limit considerably the produced notch depth. Another problem in OFDM is the high peak-to-average power ratio (PAPR). In this paper, a technique combining subcarriers precoding with tone reservation is proposed to deepen spectrum notch and simultaneously reduce peak-to-average power ratio. Simulation results show that this presented joint algorithm can produce satisfied results to solve these problems at the expense of a moderate loss in bit error rate (BER) performance.

Key words:

OFDM, spectrum notch, PAPR, subcarriers precoding, tone reservation