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| Title | Optimization of delay diversity for linear equalization |
| Publication Type | Conference Paper |
| Year of Publication | 2005 |
| Authors | Yiu, S., R. Schober, and W. Gerstacker |
| Conference Name | Wireless Communications and Networking Conference, 2005 IEEE |
| Pagination | 905 - 910 Vol. 2 |
| Date Published | mar. |
| Keywords | approximation theory, BER approximation, bit error rate approximation, cellular radio, channel state information, correlated MIMO fading channel, correlated multiple-input multiple-output frequency-selective fading channel, delay diversity optimization, delays, diversity reception, equalisers, error statistics, fading channels, filtering theory, frequency-selective channel, gradient methods, GSM/EDGE system, linear equalization, MIMO systems, optimisation, radio receivers, radio transmitters, receiver, space-time codes, space-time coding, statistical analysis, stochastic gradient algorithm, stochastic processes, transmit filters |
| Abstract | We optimize delay diversity (DD) for the case when simple linear equalization (LE) is used at the receiver. We consider the general case of transmission over a correlated multiple-input multiple-output (MIMO) frequency-selective fading channel. The proposed optimization requires the knowledge of the statistical properties of the wireless channel at the transmitter, but channel state information is only required at the receiver side. Based on an approximation of the bit error rate for LE, we derive a stochastic gradient algorithm that allows us to optimize the DD transmit filters. Simulation results for the GSM/EDGE system show significant performance gains for the proposed optimized DD scheme over DD schemes reported previously (Gore, D. et al., Proc. IEEE Int. Conf. Commun., ICC, p.1949-53, 2002; Schober, R. et al., IEEE Trans. Wireless Commun., 2004), if LE is used at the receiver. |
| URL | http://dx.doi.org/10.1109/WCNC.2005.1424628 |
| DOI | 10.1109/WCNC.2005.1424628 |