Pilot-Based Synchronization and Equalization in Filter Bank Multicarrier Communications

This paper presents a detailed analysis of synchronization methods based on scattered pilots for filter bank based multicarrier (FBMC) communications, taking into account the interplay of the synchronization, channel estimation, and equalization methods. We show that by applying pilots designed specifically for filter banks, the carrier frequency offset (CFO), fractional time delay (FTD), and channel response can be accurately estimated. Further, a novel joint FTD and channel estimation scheme, based on iterative interference cancelation, permits extending the FTD estimation range well beyond the limit imposed by the pilot separation. The channel parameter estimation and compensation are successfully performed totally in the frequency domain, in a subchannel-wise fashion, which is appealing in spectrally agile and cognitive radio scenarios. The performance evaluation is done in a hypothetical WiMAX scenario in which an FBMC system would substitute OFDM maintaining as much physical layer compatibility as possible.

[1]  B. Hirosaki.  An Analysis of Automatic Equalizers for Orthogonally Multiplexed QAM Systems , 1980, IEEE Trans. Commun..

[2]  D. Thomson,et al.  Spectrum estimation and harmonic analysis , 1982, Proceedings of the IEEE.

[3]  Steven Kay,et al.  A Fast and Accurate Single Frequency Estimator , 2022 .

[4]  P. Vaidyanathan.  Multirate Systems And Filter Banks , 1992 .

[5]  Henrique S. Malvar,et al.  Signal processing with lapped transforms , 1992 .

[6]  C. F. N. Cowan,et al.  Channel Equalization , 1993 .

[7]  B. Floch,et al.  Coded orthogonal frequency division multiplex , 1995 .

[8]  Michael A. Tzannes,et al.  Overlapped Discrete Multitone Modulation for High Speed Copper Wire Communication , 2006, IEEE J. Sel. Areas Commun..

[9]  Claude Berrou,et al.  Coded orthogonal frequency division multiplex [TV broadcasting] , 1995, Proc. IEEE.

[10]  Anders Vahlin,et al.  Optimal finite duration pulses for OFDM , 1996, IEEE Trans. Commun..

[11]  Thomas Wiegand,et al.  Equalizers for transmultiplexers in orthogonal multiple carrier data transmission , 1996 .

[12]  S. Nedic.  An unified approach to equalization and echo cancellation in OQAM-based multi-carrier data transmission , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[13]  Per Ola Börjesson,et al.  ML estimation of time and frequency offset in OFDM systems , 1997, IEEE Trans. Signal Process..

[14]  K. W. Martin,et al.  Small side-lobe filter design for multitone data-communication applications , 1998 .

[15]  Luc Vandendorpe,et al.  Fractionally spaced linear and decision-feedback detectors for transmultiplexers , 1998, IEEE Trans. Signal Process..

[16]  Ramjee Prasad,et al.  OFDM for Wireless Multimedia Communications , 1999 .

[17]  Joseph Mitola,et al.  Cognitive radio: making software radios more personal , 1999, IEEE Wirel. Commun..

[18]  Helmut Bölcskei,et al.  Blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems , 2001, IEEE Trans. Commun..

[19]  Jonathan H. Manton,et al.  Optimal training sequences and pilot tones for OFDM systems , 2001, IEEE Communications Letters.

[20]  Maurice G. Bellanger,et al.  Specification and design of a prototype filter for filter bank based multicarrier transmission , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[21]  Marc Moonen,et al.  Per tone equalization for DMT-based systems , 2001, IEEE Trans. Commun..

[22]  Peter Kabal,et al.  Adaptive filterbank multicarrier wireless systems for indoor environments , 2002, Proceedings IEEE 56th Vehicular Technology Conference.

[23]  Pierre Siohan,et al.  Analysis and design of OFDM/OQAM systems based on filterbank theory , 2002, IEEE Trans. Signal Process..

[24]  Jean-Philippe Javaudin,et al.  Pilot-aided channel estimation for OFDM/OQAM , 2003, The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring..

[25]  Ieee Microwave Theory,et al.  Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems — Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands , 2003 .

[26]  Markku Renfors,et al.  Exponentially-modulated filter bank-based transmultiplexer , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[27]  Shahriar Mirabbasi,et al.  Overlapped complex-modulated transmultiplexer filters with simplified design and superior stopbands , 2003, IEEE Trans. Circuits Syst. II Express Briefs.

[28]  Simon Haykin,et al.  Cognitive radio: brain-empowered wireless communications , 2005, IEEE Journal on Selected Areas in Communications.

[29]  C.-C. Jay Kuo,et al.  Multi-Carrier Techniques for Broadband Wireless Communications , 2007 .

[30]  Markku Renfors,et al.  Channel Equalization in Filter Bank Based Multicarrier Modulation for Wireless Communications , 2007, EURASIP J. Adv. Signal Process..

[31]  C.-C. Jay Kuo,et al.  Multi-Carrier Techniques for Broadband Wireless Communications - A Signal Processing Perspective , 2007, Communications and Signal Processing.

[32]  Behrouz Farhang-Boroujeny,et al.  Multicarrier communication techniques for spectrum sensing and communication in cognitive radios , 2008, IEEE Communications Magazine.

[33]  Pierre Siohan,et al.  Channel estimation methods for preamble-based OFDM/OQAM modulations , 2008, Eur. Trans. Telecommun..

[34]  J.A. Nossek,et al.  MMSE subcarrier equalization for filter bank based multicarrier systems , 2008, 2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications.

[35]  M. Renfors,et al.  Practical issues in frequency domain synchronization for filter bank based multicarrier transmission , 2008, 2008 3rd International Symposium on Communications, Control and Signal Processing.

[36]  Tapio Saramäki,et al.  A Generalized Window Approach for Designing Transmultiplexers , 2008, IEEE Transactions on Circuits and Systems I: Regular Papers.

[37]  B. Jahan,et al.  Full Synchronization Method for OFDM/OQAM and OFDM/QAM Modulations , 2008, 2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications.

[38]  Markku Renfors,et al.  Prototype filter design for filter bank based multicarrier transmission , 2009, 2009 17th European Signal Processing Conference.

[39]  Markku Renfors,et al.  CFO estimation and correction in a WiMAX-like FBMC system , 2009, 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications.

[40]  Mario Tanda,et al.  Data-aided symbol timing and CFO synchronization for filter bank multicarrier systems , 2009, IEEE Transactions on Wireless Communications.

[41]  Pierre Siohan,et al.  Iterative scattered pilot channel estimation in OFDM/OQAM , 2009, 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications.