Combined bit swap and power gain adaptation for error rate equalization in DMT systems

Author

Tsai, Shang-Ho ; Lin, Yuan-Pei ; Kuo, C. C Jay

Author_Institution

Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA

Volume

4

fYear

2004

fDate

17-21 May 2004

Abstract

A new adaptation algorithm, to equalize the symbol error rates over all subchannels, is proposed, to overcome the slow time-varying noise environment existing in xDSL channels. The proposed algorithm combines the conventional bit swap algorithm with power gain adaptation. The overall transmission power before and after adjustment is kept the same. Simulation results demonstrate that the proposed algorithm has a faster convergence speed and a smaller dynamic range of the equalized noise variance than the bit swap algorithm.

Keywords

adaptive equalisers; convergence; digital subscriber lines; error statistics; time-varying channels; DMT systems; combined bit swap/power gain adaptation; convergence speed; discrete multitone technique; equalized noise variance dynamic range; slow time-varying noise environment; subchannel error rates; symbol error rate equalization; transmission power level; xDSL channels; Bit rate; Control engineering; Convergence; Error analysis; Error probability; OFDM modulation; Performance loss; Signal to noise ratio; Transceivers; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-8484-9

Type

conf

DOI

10.1109/ICASSP.2004.1327014

Filename

1327014