A Frequency-Domain Correlation Matrix Estimation Algorithm for MIMO-OFDM Channel Estimation

— The second-order statistics of a time-domain signal are very often used in blind and semi-blind channel estimation. Considering that the received signal in MIMO-OFDM systems might be corrupted in the time-domain due to some adverse factors such as frequency offset and large peak-to-average power ratio (PAPR), an IFFT processor is required in the receiver to achieve a good-quality time-domain signal. This additional IFFT incurs extra computational complexity and probably a long time delay as well in real-time communication systems. In this paper, we propose a new algorithm for the computation of the timedomain correlation matrix directly from the received frequencydomain signal. The proposed frequency-domain correlation matrix estimation method is then used to develop a new semi-blind MIMO-OFDM channel estimation approach. A number of computer simulation based experiments are conducted, confirming the effectiveness of the proposed method.

• Type: Conference
• Year: 2008
• Where: VTC
• Authors: Feng Wan, Wei-Ping Zhu, M. N. S. Swamy
• Keywords: Channel Estimation, Communications, Correlation Matrix, Time-domain Signal, VTC 2008