Differential Space-Time Modulation for Transmissions over Unknown FIR Channels

Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany

Proceedings: PIMRC 2005

Pages: 5Language: englishTyp: PDF

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Zhang, Zhan; Ilow, Jack (Dalhousie University, Department of Electrical and Computer Engineering, Halifax, NS, B3J 2X4, Canada)

This paper presents a differential space-time transceiver over multiple-input multiple-output (MIMO) time-dispersive channels. The underlying idea is to transform the block Toeplitz received signal structure caused by the finite impulse response (FIR) multipath channels into a block circulant matrix structure by deploying specialized signaling when transmitting through multiple antennas. This structure is then exploited by using the efficient space-time (ST) processing at the receiver for the mitigation of the channel multipath effects. The new, low complexity, transceiver is based on cyclic group codes and a differential ST demodulation. The proposed scheme falls into the category of the deterministic approaches that are able to operate on short sample data and do not face convergence problems. Simulation results verify the robust performance of the scheme over the MIMO-FIR fading channels.