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

  • 제38B권4호
  • /
  • Pages.305-313
  • /
  • 2013
  • /
  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지
DOI QR코드

DOI QR Code

광대역 VHF 기저대역 모뎀의 효율적인 송·수신 기법

An Efficient Transceiver Technique for Wideband VHF Baseband Modem

  • Lee, Hwang-Hee (School of Electric & Electronic Engineering, Chung-Ang University) ;
  • Kim, Jae-Hwan (School of Electric & Electronic Engineering, Chung-Ang University) ;
  • Yang, Won-Young (School of Electric & Electronic Engineering, Chung-Ang University) ;
  • Cho, Yong-Soo (School of Electric & Electronic Engineering, Chung-Ang University)
  • 투고 : 2013.01.31
  • 심사 : 2013.03.27
  • 발행 : 2013.04.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 ETS EN 300 392-2에 기반을 둔 Wideband VHF 통신시스템의 FMT (Filtered Multi-Tone) 전송방식으로서, 기존의 세 가지 구현 방법, 즉 각 부반송파 별로 대역이 다른 SRRC (Square-Root Raised Cosine) 필터를 사용하는 direct filtering 방식과, 송 수신측에서 각각 IDFT-PPN (Poly-Phase Network)와 PPN-DFT를 사용하는 PPN-DFT 방식, 그리고 이 두 가지 방식처럼 시간영역에서 필터링하는 대신 주파수영역에서 필터링하는 Extended IDFT-DFT 방식을 기술한다. 그리고, 수신측에서 관심있는 부반송파들만에 대한 DFT값들을 매 샘플시점마다 계산하는 Extended DFT-SDFT (Sliding Discrete Fourier Transform) 방식을 제안하고, 다중 사용자에게 부반송파가 할당되고 각 사용자 신호가 서로 다른 채널을 통해 전송되는 환경에서 이 방식이 각 사용자 신호에 대해 개별적으로 (다른 사용자 신호들에 상관없이) 훈련 심볼을 사용하지 않는 블라인드 심볼 타이밍의 강점이 있다는 것을 보여준다.

As an FMT (Filtered Multi-Tone) transmission method of Wideband VHF communication system specified by the ETS (European Telecommunications Standards) EN 300 392-2, this paper introduces three existing realization methods, i.e., the direct filtering method using different band SRRC (Square-Root Raised Cosine) filters for each subcarrier, the PPN-DFT method using the IDFT-PPN (Poly-Phase Network) and PPN-DFT at the transmitter and receiver, respectively, and the Extended DFT method. Then, it proposes the extended IDFT-SDFT (Sliding Discrete Fourier Transform) that computes the DFT values only for interested subcarriers every sample time, and shows that it has an advantage of blind symbol timing (using no training symbol) individually for each user signal (independently of other users' signals) in the multi-user environment where the subcarriers are assigned in contiguous or interleaved blocks to each user and each user signal possibly experiences different channels.

키워드

참고문헌

  1. S. K. Kim, H. H. Lee, and Y. S. Cho, "Multi-carrier multi-stage transmission technique for wideband VHF communication systems," in Proc. KICS Summer Conf., pp. 737-738, Jeju Island, Korea, June 2012.
  2. ETSI, "Draft Terrestrial Trunked Radio (TETRA); Voice plus Data(V+D); Part 2: Air Interface (AI)," ETSI EN 300 392-2, Mar. 2001.
  3. A. Petrella, "Synchronization Algorithms for FBMC Systems," Ph.D dissertion, Dept. Elect. Telecommun. Eng., Universita Degli Studi Di Napoli Federico II, 2009.
  4. G. Cherubini, E. Eleftheriou, S. Olcer, and J. M. Cioffi, "Filter bank modulation techniques for very high-speed digital subscriber lines," IEEE Commun. Mag., vol. 38, no. 5, pp. 98-104, May 2000.
  5. G. Cherubini, E. Eleftheriou, S. Olcer, and J. M. Cioffi, "Filtered multitone modulation for very high-speed digital subscriber lines," IEEE J. Select. Areas Commun., vol. 20, no. 5, pp. 1016-1028, June 2002. https://doi.org/10.1109/JSAC.2002.1007382
  6. I. Berenguer, "Filtered multitone (FMT) modulation for broadband fixed wireless systems," M. Phil Thesis, Dept. Eng., University of Cambridge, 2002.
  7. M. Bellanger and Phydyas team, "FBMC physical layer: a primer," Retrieved June, 2010, from http://www.ict-phydyas.org/teamspace/internal-folder/FBMC-Primer_06-2010.pdf/view.
  8. B. Farhang-Boroujeny, "OFDM versus filter bank multicarrier," IEEE Signal Processing Mag., vol. 28, no. 3, pp. 92-112, May 2011. https://doi.org/10.1109/MSP.2011.940267
  9. T. Luo, F. Lin, T. Jiang, M. Guizani, and W. Chen, "Multicarrier modulation and cooperative communication in multihop cognitive radio networks," IEEE Wireless Commun., vol. 18, no. 1, pp. 38-45, Feb. 2011. https://doi.org/10.1109/MWC.2011.5714024
  10. P. Amini, "Filterbank multicarrier techniques for cognitive radios," Ph.D dissertion, Dept. Elec. Comput. Eng., The Univ. of Utah Graduate School, 2009.
  11. A. M. Tonello and F. Rossi, "Synchronization and channel estimation for filtered multitone modulation," in Proc. Int. Symp. Wireless Personal Multimedia Commun., pp. 590-594, Abano Terme, Italy, Sep. 2004.
  12. A. M. Tonello and F. Pecile, "Synchronization algorithms and receiver structures for multiuser filterbank uplink systems," EURASIP J. Wireless Commun. Networking, vol. 2009, no. 1, pp. 1-17, Jan. 2009.
  13. F. Pecile and A. M. Tonello, "Maximum SINR synchronization strategies in multiuser filter bank schemes," EURASIP J. Wireless Commun. Networking, vol. 2010, no. 1, pp. 1-11, Aug. 2010.
  14. R. Hartley and K. Welles, "Recursive computation of the Fourier transform," IEEE Int. Symp. Circuits Syst., vol. 3, pp. 1792-1795, May 1990.
  15. N. Moret and A. M. Tonello, "Design of orthogonal filtered multitone modulation systems and comparison among efficient realizations," EURASIP J. Advances Signal Process., vol. 2010, no. 1, pp. 1-18, Feb. 2010.