Block-by-Block Channel and Sequence Estimation for ISI/Fading Channels
We look at the well studied problems of sequence estimation in unknown or fading channels, and introduce yet another set of algorithms that have reasonable complexity and perform well even in fast changing environments. The algorithms work on a block-by-block basis and utilize periodically, but sparsely inserted known data symbols. In producing their channel estimates, however, the algorithms do make use of the information contained in the received modulated data, thus reducing the rate at which known symbols need to be inserted, and improving performance. Simulation results show good performance for the algorithms.
Unable to display preview. Download preview PDF.
- N. Seshadri, “Joint data and channel estimation using fast blind trellis search techniques,” IEEE Globecom ’92Conf. Ree. 807.1, pp. 1659–1663, Dec. 1990.Google Scholar
- C. N. Georghiades and J. C. Han, “On the Application of the EM Algorithm to Sequence Estimation for Degraded Channels”, Proceedings of the Allerton Conference, Urbana, Illinois, September 1994.Google Scholar
- J. Salz, “On the start-up problem in digital echo cancelers,” The Bell System Technical Journal, vol. 62, pp. 1353–1364, 1983.Google Scholar
- J. G. Proakis, Digital Communications, McGraw-Hill, 1989.Google Scholar