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.
Low complexity channel shortening for discrete multitone modulation systems [pdf]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},
}
Downloads: 0