Title | Blind on-line detection of equalisation errors in digital communications |
Publication Type | Conference Paper |
Year of Publication | 1997 |
Authors | Dogancay, K., and V. Krishnamurthy |
Conference Name | Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on |
Pagination | 3873 -3876 vol.5 |
Date Published | apr. |
Keywords | blind online detection, channel equaliser output, data communication, detection performance, digital communication, digital communications, equalisation errors, equalisers, error analysis, least squares approximations, linear systems, linear time-invariant channels, linear time-invariant model, noisy channel output, online test, recursive estimation, recursive least squares algorithm, RLS algorithm, signal detection, simulation, telecommunication channels, transmitted symbol estimates |
Abstract | Equalisation errors result from discrepancies between transmitted symbols and their estimates at the channel equaliser output in a digital communication system. This paper presents an on-line test to detect the occurrence of equalisation errors without direct access to the channel input. The test draws on the observation that for linear time-invariant (LTI) channels the relationship between transmitted symbol estimates generated by the equaliser and the noisy channel output can be represented by an underlying linear time-invariant model if and only if no equalisation errors are present in the sequence of transmitted symbol estimates. The presence of equalisation errors renders this relationship time-varying, of which the occurrence is detected by the proposed on-line test using the recursive least squares (RLS) algorithm. Simulation studies corroborate the good detection performance of the test |
URL | http://dx.doi.org/10.1109/ICASSP.1997.604745 |
DOI | 10.1109/ICASSP.1997.604745 |