Abstract
Discrete multitone (DMT) uses an inverse discrete Fourier transform (IDFT) to modulate data on the carriers. The high sidelobes of the IDFT filter bank used can lead to spurious emissions (egress) in unauthorized frequency bands. Applying a window function within the DMT symbol can alleviate this. However, window functions either require additional redundancy or will introduce distortions that are generally not easy to compensate for. In this paper, a special class of window functions is constructed that corresponds to a precoding at the transmitter. These do not require any additional redundancy and need only a modest amount of additional processing at the receiver. The results can be used to increase the spectral containment of DMT-based wired communications such as ADSL and VDSL (i.e., asymmetric, resp., very-high-bitrate digital subscriber loop).
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References
Weinstein SB, Ebert PM: Data transmission by frequency-division multiplexing using the discrete fourier transform. IEEE Transactions on Communications 1971, 19(5):628-634. 10.1109/TCOM.1971.1090705
Peled A, Ruiz A: Frequency domain data transmission using reduced computational complexity algorithms. Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '80), April 1980, Denver, Colo, USA 5: 964–967.
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
Song KB, Chung ST, Ginis G, Cioffi JM: Dynamic spectrum management for next-generation DSL systems. IEEE Communications Magazine 2002, 40(10):101–109. 10.1109/MCOM.2002.1039864
Stolle R: Electromagnetic coupling of twisted pair cables. IEEE Journal on Selected Areas in Communications 2002, 20(5):883–892. 10.1109/JSAC.2002.1007371
Redfern AJ: Receiver window design for multicarrier communication systems. IEEE Journal on Selected Areas in Communications 2002, 20(5):1029–1036. 10.1109/JSAC.2002.1007383
Kapoor S, Nedic S: Interference suppression in DMT receivers using windowing. Proceedings IEEE International Conference on Communications (ICC '00), June 2000, New Orleans, La, USA 2: 778–782.
Cuypers G, Ysebaert G, Moonen M, Vandaele P: Combining per tone equalization and windowing in DMT receivers. Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '02), May 2002, Orlando, Fla, USA 3: 2341–2344.
ETSI : Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Very high speed Digital Subscriber Line (VDSL); part 1: Functional requirements. TS 101 270-1 V1.2.1 (1999-10), October 1999
Martin KW: Small side-lobe filter design for multitone data-communication applications. IEEE Transactions on Circuits and Systems—Part II: Analog and Digital Signal Processing 1998, 45(8):1155–1161.
Cherubini G, Eleftheriou E, Ölçer S: Filtered multitone modulation for VDSL. Proceedings IEEE Global Telecommunications Conference (GLOBECOM '99), December 1999, Rio de Janeireo, Brazil 2: 1139–1144.
Harris FJ: On the use of windows for harmonic analysis with the discrete Fourier transform. Proceedings of the IEEE 1978, 66(1):51–83.
Sjöberg F, Nilsson R, Isaksson M, Ödling P, Börjesson PO: Asynchronous Zipper [subscriber line duplex method]. Proceedings IEEE International Conference on Communications (ICC '99), June 1999, Vancouver, BC, Canada 1: 231–235.
Lin Y-P, Phoong S-M: Window designs for DFT-based multicarrier systems. IEEE Transactions on Signal Processing 2005, 53(3):1015–1024.
Minn H, Tellambura C, Bhargava VK: On the peak factors of sampled and continuous signals. IEEE Communications Letters 2001, 5(4):129–131. 10.1109/4234.917090
Poularikas AD: Handbook of Formulas and Tables for Signal Processing. CRC Press/IEEE, Boca Raton, Fla, USA; 1998.
Vaidyanathan PP: Multirate Systems and Filter Banks. 1st edition. Prentice Hall, Englewood Cliffs, NJ, USA; 1993.
ETSI : Vdsl: Transceiver specification. TS 101 270-2 V1.1.1 (2001-02), 2001
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Cuypers, G., Vanbleu, K., Ysebaert, G. et al. Intra-Symbol Windowing for Egress Reduction in DMT Transmitters. EURASIP J. Adv. Signal Process. 2006, 070387 (2006). https://doi.org/10.1155/ASP/2006/70387
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DOI: https://doi.org/10.1155/ASP/2006/70387