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EM-Based sequence estimation for wireless systems with orthogonal transmit diversity

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Date

2003

Author

Panayırcı, Erdal
Aygölü, Hasan Ümit
Pusane, Ali Emre

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Citation

Panayırcı, E., Aygölü, H. Ü. & Pusane, A. M. (2003). EM-Based sequence estimation for wireless systems with orthogonal transmit diversity. Paper presented at the IEEE International Conference on Communications, 3210-3214. doi:10.1109/ICC.2003.1204025

Abstract

In this paper, an optimum sequence estimation algorithm for wireless systems with Alamouti's two transmitter diversity in the presence of multipath fading is proposed. The algorithm is based on a jointly iterative channel and sequence estimation according to the maximum likelihood (ML) criterion, using the Expectation-Maximization (EM) algorithm employing M-PSK modulation scheme with additive Gaussian noise. The discrete multipath channel is represented in terms of the channel gains from each transmit antenna to the receive antenna. EM algorithm derived estimates jointly the complex channel parameters of each channel And the data sequence transmitted, iteratively, which converges to the true ML solution. The channel estimation is achieved in a simple way through the iterative equations by decoupling of the signals transmitted from different antennas. The algorithm is applied to the trellis coded modulation systems and efficiency of the algorithm proposed has been shown by the computer simulations. Simulation results show that the EM algorithm converges quickly for fast fading channels. The performance of the EM-based decoder approaches that of the ML receiver which has perfect knowledge of the channel.

Source

IEEE International Conference on Communications

URI

https://hdl.handle.net/11729/670
http://dx.doi.org/10.1109/ICC.2003.1204025

Collections

  • MF - Bildiri Koleksiyonu | Elektrik-Elektronik Mühendisliği Bölümü / Department of Electrical-Electronics Engineering [211]
  • Scopus İndeksli Bildiri Koleksiyonu [409]
  • WoS İndeksli Bildiri Koleksiyonu [332]

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