The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지
DOI QR코드

DOI QR Code

Selected Mapping without Side Information at the Receiver

수신기에서 부가정보가 필요 없는 Selected Mapping 기법

  • Jang, Chanki (Konkuk University Department of Electronics Engineering) ;
  • Yoon, Eunchul (Konkuk University Department of Electronics Engineering)
  • Received : 2015.08.27
  • Accepted : 2015.09.11
  • Published : 2015.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Selected mapping (SLM) is an effective scheme to reduce the peak to average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) system. For data recovery, the receiver needs to know the side information (SI) on the scrambling sequence selected by the transmitter. In this paper, a new SLM scheme is proposed, which can reduce implementation complexity substantially by allowing the receiver to recover the data without SI. In the proposed SLM method, the concept of virtual channel corresponding to the convolution of the multipath channel and the inverse discrete fourier transform (IDFT) of the scrambling sequence is assumed. The receiver can recover the data without SI by using the virtual channel estimated with pilot signals. It is shown by simulation that the proposed SLM has PAPR reduction and BER performances similar to the previous SLM schemes while it can reduce implementation complexity substantially.

SLM(selected mapping)은 OFDM(orthogonal frequency division multiplexing)의 PAPR(peak to average power ratio)을 줄이는 효과적인 방법이다. 데이터를 복구하기 위해서 수신기는 송신기가 선택한 스크램블링 수열의 색인정보인 부가정보 SI(side information)를 알아야한다. 본 논문에서는 수신기가 SI 없이 데이터를 복원할 수 있도록 함으로써 구현 복잡도를 낮출 수 있는 새로운 SLM 방법을 제안한다. 제안된 방법에서는 다중 경로 채널과 IDFT(inverse discrete fourier transform)된 스크램블링 수열의 컨볼루션에 해당하는 가상 다중 경로 채널을 가정한다. 파일럿을 사용해 측정한 가상 채널을 바탕으로 데이터를 복원함으로써 SI 없이도 수신기가 데이터를 복원할 수 있다. 제안된 SLM 방법이 이전 SLM 방법들과 비슷한 PAPR 성능 및 BER 성능을 가짐을 모의실험을 통해 보인다.

Keywords

References

  1. Y.-J. Cho, J.-S. No, and D.-J. Shin, "Low complexity PTS scheme for reducing PAPR in OFDM systems," J. KICS, vol. 38, no. 2, pp. 201-208, Feb. 2013.
  2. Y. Shang, et al., "New PAPR reduction method for spatial modulation," J. KICS, vol. 39, no. 1, pp. 12-18, Jan. 2014.
  3. M.-H. Jang and K.-H. Kim, "Pilot tone design for PAPR reduction in OFDM systems based on compressed channel sensing," J. KICS, vol. 40, no. 5, pp. 806-808, May 2015. https://doi.org/10.7840/kics.2015.40.5.806
  4. R. W. Bäuml, R. F. H. Fischer, and J. B. Huber, "Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping," IET Electron. Lett., vol. 32, no. 22, pp. 2056-2057, Oct. 1996. https://doi.org/10.1049/el:19961384
  5. A. D. S. Jayalath and C. Tellambura, "SLM and PTS peak-power reduction of OFDM signals without side information," IEEE Trans. Wireless Commun., vol. 4, no. 5, pp. 2006-2013, Sept. 2005. https://doi.org/10.1109/TWC.2005.853916
  6. E. Hong, et al., "Pilot-aided side information detection in SLM-based OFDM systems," IEEE Trans. Wireless Commun., vol. 12, no. 7 pp. 3140-3147, Jul. 2013.
  7. J. S. Wang, et al., "Combining of cyclically delayed signals: A low-complexity scheme for PAPR reduction in OFDM systems," IEEE Trans. Broadcast., vol. 56, no. 4, pp. 477-583, Dec. 2010.
  8. M. Morelli and U. Mengali, "A comparison of pilot-aided channel estimation methods for OFDM systems," IEEE Trans. Signal Process., vol. 49, no. 12, pp. 3065-3073, Dec. 2001. https://doi.org/10.1109/78.969514
  9. C. Rapp, "Effects of HPA-nonlinearity on a 4-DPSK /OFDM-signal for a digital sound broadcasting signal," in Proc. Eur. Conf. Satellite Commun., pp. 179-184, 1991.

Cited by

  1. 실수 M진 QAM의 정확한 분석 vol.42, pp.2, 2015, https://doi.org/10.7840/kics.2017.42.2.299
  2. A novel PTS-based PAPR reduction scheme for FBMC-OQAM system without extra bit transmission of SI vol.108, pp.6, 2021, https://doi.org/10.1080/00207217.2020.1818847