Interference robust transmission for the downlink of an OFDM-based mobile communications system
EURASIP Journal on Wireless Communications and Networking - Multicarrier Systems
IEEE Transactions on Wireless Communications
Hybrid technology for next generation broad band mobile radio communications
WOCN'09 Proceedings of the Sixth international conference on Wireless and Optical Communications Networks
Cochannel interference avoidance MAC in wireless cellular networks
IEEE Transactions on Communications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Interference cancellation based on divergence minimization for MIMO-OFDM receivers
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Channel estimation based on divergence minimization for OFDM sytems with co-channel interference
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Hi-index | 0.01 |
Space-time coded orthogonal frequency division multiplexing (OFDM) is a promising scheme for future wideband multimedia wireless communication systems. The combination of space-time coding (STC) and OFDM modulation promises an enhanced performance in terms of power and spectral efficiency. Such combination benefits from the diversity gain within the multiple-input-multiple-output ST coded system and the matured OFDM modulation for wideband wireless transmission. However, STC transmit diversity impairs the system's interference suppression ability due to the use of multiple transmitters at each mobile. We propose an effective co-channel interference (CCI) cancellation method that employs angle diversity based on -steering beamforming or minimum variance distortion response beamforming. It is shown that the proposed method can effectively mitigate CCI while preserving the space-time structure, thereby, significantly improving the system's interference suppression ability without significant bit-error rate performance degradation. Furthermore, it is demonstrated that the proposed method can significantly combat the delay spread detrimental effects over multipath fading channels without the use of interleaving.