A joint OFDM PAPR reduction and data decoding scheme with no SI estimation

Saheed A. Adegbite, Scott G. McMeekin, Brian G. Stewart

Research output: Contribution to journalArticle

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Abstract

The need for side information (SI) estimation poses a major challenge when selected mapping (SLM) is implemented to reduce peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. Recent studies on pilot-assisted SI estimation procedures suggest that it is possible to determine the SI without the need for SI transmission. However, SI estimation adds to computational complexity and implementation challenges of practical SLM-OFDM receivers. To address these technical issues, this paper presents the use of a pilot-assisted cluster-based phase modulation and demodulation procedure called embedded coded modulation (ECM). The ECM technique uses a slightly modified SLM approach to reduce PAPR and to enable data recovery with no SI transmission and no SI estimation. In the presence of some non-linear amplifier distortion, it is shown that the ECM method achieves similar data decoding performance as conventional SLM-OFDM receiver that assumed a perfectly known SI and when the SI is estimated using a frequency domain correlation approach. However, when the number of OFDM subcarriers is small and due to the clustering in ECM, the modified SLM produces a smaller PAPR reduction gain compared with conventional SLM.
Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalEURASIP Journal on Wireless Communications and Networking
Early online date18 Apr 2016
DOIs
Publication statusPublished - Apr 2016

Fingerprint

Orthogonal frequency division multiplexing
Decoding
Modulation
Phase modulation
Demodulation
Computational complexity
Recovery

Keywords

  • low computational complexity
  • orthogonal frequency division multiplexing (OFDM)
  • peak-to-average power ratio (PAPR)
  • selective mapping (SLM)
  • side information (SI) estimation

Cite this

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abstract = "The need for side information (SI) estimation poses a major challenge when selected mapping (SLM) is implemented to reduce peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. Recent studies on pilot-assisted SI estimation procedures suggest that it is possible to determine the SI without the need for SI transmission. However, SI estimation adds to computational complexity and implementation challenges of practical SLM-OFDM receivers. To address these technical issues, this paper presents the use of a pilot-assisted cluster-based phase modulation and demodulation procedure called embedded coded modulation (ECM). The ECM technique uses a slightly modified SLM approach to reduce PAPR and to enable data recovery with no SI transmission and no SI estimation. In the presence of some non-linear amplifier distortion, it is shown that the ECM method achieves similar data decoding performance as conventional SLM-OFDM receiver that assumed a perfectly known SI and when the SI is estimated using a frequency domain correlation approach. However, when the number of OFDM subcarriers is small and due to the clustering in ECM, the modified SLM produces a smaller PAPR reduction gain compared with conventional SLM.",
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A joint OFDM PAPR reduction and data decoding scheme with no SI estimation. / Adegbite, Saheed A.; McMeekin, Scott G.; Stewart, Brian G.

In: EURASIP Journal on Wireless Communications and Networking , 04.2016, p. 1-12.

Research output: Contribution to journalArticle

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