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Channel Equalization in Filter Bank Based Multicarrier Modulation for Wireless Communications
EURASIP Journal on Advances in Signal Processing volume 2007, Article number: 049389 (2006)
Abstract
Channel equalization in filter bank based multicarrier (FBMC) modulation is addressed. We utilize an efficient oversampled filter bank concept with 2x-oversampled subcarrier signals that can be equalized independently of each other. Due to Nyquist pulse shaping, consecutive symbol waveforms overlap in time, which calls for special means for equalization. Two alternative linear low-complexity subcarrier equalizer structures are developed together with straightforward channel estimation-based methods to calculate the equalizer coefficients using pointwise equalization within each subband (in a frequency-sampled manner). A novel structure, consisting of a linear-phase FIR amplitude equalizer and an allpass filter as phase equalizer, is found to provide enhanced robustness to timing estimation errors. This allows the receiver to be operated without time synchronization before the filter bank. The coded error-rate performance of FBMC with the studied equalization scheme is compared to a cyclic prefix OFDM reference in wireless mobile channel conditions, taking into account issues like spectral regrowth with practical nonlinear transmitters and sensitivity to frequency offsets. It is further emphasized that FBMC provides flexible means for high-quality frequency selective filtering in the receiver to suppress strong interfering spectral components within or close to the used frequency band.
References
van. Nee R, Prasad R: OFDM for Wireless Multimedia Communications. Artech House, Boston, Mass, USA; 2000.
Chang RW: Synthesis of band-limited orthogonal signals for multichannel data transmission. Bell System Technical Journal 1966, 45: 1775–1796.
Saltzberg BR: Performance of an efficient parallel data transmission system. IEEE Transactions on Communications 1967,15(6):805–811.
Hirosaki B: An analysis of automatic equalizers for orthogonally multiplexed QAM systems. IEEE Transactions on Communications 1980,28(1):73–83. 10.1109/TCOM.1980.1094576
Le Floch B, Alard M, Berrou C: Coded orthogonal frequency division multiplex. Proceedings of the IEEE 1995,83(6):982–996. 10.1109/5.387096
Sandberg SD, Tzannes MA: Overlapped discrete multitone modulation for high speed copper wire communications. IEEE Journal on Selected Areas in Communications 1995,13(9):1571–1585. 10.1109/49.475531
Vahlin A, Holte N: Optimal finite duration pulses for OFDM. IEEE Transactions on Communications 1996,44(1):10–14. 10.1109/26.476088
Wiegand T, Fliege NJ: Equalizers for transmultiplexers in orthogonal multiple carrier data transmission. Proceedings of the European Signal Processing Conference (EUSIPCO '96), September 1996, Trieste, Italy 2: 1211–1214.
Nedic S: An unified approach to equalization and echo cancellation in OQAM-based multi-carrier data transmission. Proceedings of IEEE Global Telecommunications Conference (GLOBECOM '97), November 1997, Phoenix, Ariz, USA 3: 1519–1523.
Vandendorpe L, Cuvelier L, Deryck F, Louveaux J, van de Wiel O: Fractionally spaced linear and decision-feedback detectors for transmultiplexers. IEEE Transactions on Signal Processing 1998,46(4):996–1011. 10.1109/78.668552
Van Acker K, Leus G, Moonen M, van de Wiel O, Pollet T: Per tone equalization for DMT-based systems. IEEE Transactions on Communications 2001,49(1):109–119. 10.1109/26.898255
Siohan P, Siclet C, Lacaille N: Analysis and design of OFDM/OQAM systems based on filterbank theory. IEEE Transactions on Signal Processing 2002,50(5):1170–1183. 10.1109/78.995073
Wyglinski AM, Kabal P, Labeau F: Adaptive filterbank multicarrier wireless systems for indoor environments. Proceedings of the 56th IEEE Vehicular Technology Conference (VTC '02), September 2002, Vancouver BC, Canada 1: 336–340.
Farhang-Boroujeny B: Multicarrier modulation with blind detection capability using cosine modulated filter banks. IEEE Transactions on Communications 2003,51(12):2057–2070. 10.1109/TCOMM.2003.820753
Farhang-Boroujeny B, Lin L: Analysis of post-combiner equalizers in cosine-modulated filterbank-based transmultiplexer systems. IEEE Transactions on Signal Processing 2003,51(12):3249–3262. 10.1109/TSP.2003.819014
Phoong S-M, Chang Y, Chen C-Y: DFT-modulated filterbank transceivers for multipath fading channels. IEEE Transactions on Signal Processing 2005,53(1):182–192.
Vetterli M: Perfect transmultiplexers. Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP '86), September 1986, Tokyo, Japan 11: 2567–2570.
Malvar HS: Signal Processing with Lapped Transforms. Artech House, Boston, Mass, USA; 1992.
Vaidyanathan PP: Multirate Systems and Filter Banks. Prentice Hall, Englewood Cliffs, NJ, USA; 1993.
Karp T, Fliege NJ: Modified DFT filter banks with perfect reconstruction. IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing 1999,46(11):1404–1414. 10.1109/82.803480
Alhava J, Renfors M: Adaptive sine-modulated/cosine-modulated filter bank equalizer for transmultiplexers. Proceedings of the European Conference on Circuit Theory and Design (ECCTD '01), August 2001, Espoo, Finland 3: 337–340.
Ihalainen T, Hidalgo Stitz T, Renfors M: On the performance of low-complexity ASCET-equalizer for a complex transmultiplexer in wireless mobile channel. Proceedings of the 7th International OFDM-Workshop, September 2002, Hamburg, Germany
Ihalainen T, Hidalgo Stitz T, Renfors M: Efficient per-carrier channel equalizer for filter bank based multicarrier systems. Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS '05), May 2005, Kobe, Japan 3175–3178.
Ihalainen T, Hidalgo Stitz T, Renfors M: Performance comparison of LDPC-coded FBMC and CP-OFDM in beyond 3G context. Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS '06), May 2006, Kos, Greece 2049–2052.
Yuan Y, Ihalainen T, Rinne M, Renfors M: Frequency domain equalization in single carrier transmission: filter bank approach. accepted to EURASIP Journal on Applied Signal Processing
Viholainen A, Alhava J, Renfors M: Efficient implementation of 2x oversampled exponentially modulated filter banks. IEEE Transactions on Circuits and Systems II 2006, 53: 1138–1142.
Alhava J, Renfors M: Complex lapped transforms and modulated filter banks. Proceedings of the 2nd International Workshop on Spectral Methods and Multirate Signal Processing (SMMSP '02), September 2002, Toulouse, France 87–94.
Viholainen A, Hidalgo Stitz T, Alhava J, Ihalainen T, Renfors M: Complex modulated critically sampled filter banks based on cosine and sine modulation. Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS '02), May 2002, Scottsdale, Ariz, USA 1: 833–836.
Viholainen A, Alhava J, Renfors M: Efficient implementation of complex modulated filter banks using cosine and sine modulated filter banks. Eurasip Journal on Applied Signal Processing 2006, 2006: 10 pages.
Lee EA, Messerschmitt DG: Digital Communication. 2nd edition. Kluwer Academic, Boston, Mass, USA; 1994.
Proakis JG: Digital Communications. 3rd edition. McGraw-Hill, New York, NY, USA; 1995.
ITU-R : Guidelines for evaluation of radio transmission technologies for IMT-2000. Recommendation M.1225, 1997
Sorensen TB, Mogensen PE, Frederiksen F: Extension of the ITU channel models for wideband (OFDM) systems. Proceedings of the 62nd IEEE Vehicular Technology Conference (VTC '05), September 2005, Dallas, Tex, USA 1: 392–396.
Laakso TI, Vālimāki V, Karjalainen M, Laine UK: Splitting the unit: delay tools for fractional delay filter design. IEEE Signal Processing Magazine 1996,13(1):30–60. 10.1109/79.482137
Gallager RG: Low-density parity-check codes. IRE Transactions on Information Theory 1962, 8: 21–28. 10.1109/TIT.1962.1057683
Rapp C: Effects of HPA-nonlinearity on a 4-DPSK/OFDM-signal for a digital sound broadcasting system. Proceedings of the 2nd European Conference on Satellite Communications, October 1991, Liege, Belgium 179–184.
Moose PH: Technique for orthogonal frequency division multiplexing frequency offset correction. IEEE Transactions on Communications 1994,42(10):2908–2914. 10.1109/26.328961
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Ihalainen, T., Hidalgo Stitz, T., Rinne, M. et al. Channel Equalization in Filter Bank Based Multicarrier Modulation for Wireless Communications. EURASIP J. Adv. Signal Process. 2007, 049389 (2006). https://doi.org/10.1155/2007/49389
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DOI: https://doi.org/10.1155/2007/49389