Low complexity channel shortening for discrete multitone modulation systems. Nguyen, V. M. & Tomasin, S. In *2017 25th European Signal Processing Conference (EUSIPCO)*, pages 410-414, Aug, 2017.

Paper doi abstract bibtex

Paper doi abstract bibtex

In discrete multitone (DMT) modulation systems, the channel duration can be longer than the cyclic prefix, yielding both inter-block and inter-carrier interference. In order to avoid these effects, time-domain equalization (TEQ) techniques are usually employed before DMT demodulation. This letter introduces a modification of the iterative minimum delay spread (MDS) method proposed by Lopez-Valcarce in [1] to adapt the TEQ coefficients to the channel. The proposed solution is based on a) the approximation to the solution of a set of equation, and b) a new reference time selection. The resulting scheme requires only a single matrix inversion at the last iteration rather than one per iteration, achieving a significantly lower implementation complexity than iterative MDS, while performing similarly in terms of spectral efficiency.

@InProceedings{8081239, author = {V. M. Nguyen and S. Tomasin}, booktitle = {2017 25th European Signal Processing Conference (EUSIPCO)}, title = {Low complexity channel shortening for discrete multitone modulation systems}, year = {2017}, pages = {410-414}, abstract = {In discrete multitone (DMT) modulation systems, the channel duration can be longer than the cyclic prefix, yielding both inter-block and inter-carrier interference. In order to avoid these effects, time-domain equalization (TEQ) techniques are usually employed before DMT demodulation. This letter introduces a modification of the iterative minimum delay spread (MDS) method proposed by Lopez-Valcarce in [1] to adapt the TEQ coefficients to the channel. The proposed solution is based on a) the approximation to the solution of a set of equation, and b) a new reference time selection. The resulting scheme requires only a single matrix inversion at the last iteration rather than one per iteration, achieving a significantly lower implementation complexity than iterative MDS, while performing similarly in terms of spectral efficiency.}, keywords = {equalisers;intercarrier interference;iterative methods;matrix inversion;modulation;spread spectrum communication;wireless channels;low complexity channel shortening;discrete multitone modulation systems;cyclic prefix;time-domain equalization techniques;DMT demodulation;iterative minimum delay spread method;Lopez-Valcarce;reference time selection;intercarrier interference;single matrix inversion;Interference;Signal to noise ratio;Complexity theory;Discrete Fourier transforms;Iterative methods;Europe;Digital Communications;Discrete Multitone;Time-Domain Equalization;Subscriber Loops}, doi = {10.23919/EUSIPCO.2017.8081239}, issn = {2076-1465}, month = {Aug}, url = {https://www.eurasip.org/proceedings/eusipco/eusipco2017/papers/1570341873.pdf}, }

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