Channel Identification and Equalization for Multi-Transmit Antenna MC-CDMA Systems with Orthogonal Space-Frequency Coding

The combination of multi-carrier CDMA and multiple antennas is a very promising candidate for the downlink in 4G systems, since it achieves robustness, high spectral efficiency, and high data rates in rich scattering environments. This paper presents the design and evaluation of a channel identification scheme as a key factor for the overall performance of MC-CDMA systems. It is efficient by means of both the mean square error (MSE) and its incorporation in a real space-frequency coded MIMO system (BER). The evaluation has been performed over the spatial channel model according to 802.16e case of 3GPP.25.996, incorporating all IF/RF stages