Blind Channel Identification in MIMO-OFDM Systems
Jin Tian-yu · Dianzi Ke-ji Daxue xuebao · 2007
Orthogonal Frequency Division Multiplexing(OFDM)significantly reduces the complexity of the receiver in wirelesss broadband systems.It has recently been used in wireless broadband multiantenna systems.The OFDM modulation simplifies the finite-impulse-response channel estimation into several memoryless systems.The proposed method uses BSS in each subcarrier to indentify the channel in the frequency domain.The source order and scaling indeterminacies inherent to BSS methods are overcome by exploiting the cross correlation between the subcarriers introduced by convolutional encoding.We assume that the channels are unknown and training sequences are not sent.