Abstract: A novel detection algorithm is proposed for V-BLAST (Vertical Bell Labs Layered Space-Time) OFDM(Orthogonal Frequency-Division Multiple)systems. At the transmitter, different subcarriers are allocated to different layers, which makes subcarriers of different layers mutual orthogonal. At the receiver, the interference suppression based on orthogonal subcarriers is employed. Compared with the conventional serial interference cancellation algorithm which requires that the number of receive antennas be at least the same as that of transmit ones, the proposed algorithm needs only one receive antenna, so the complexity of the receiver decreases remarkably.

Key words: OFDM, V-BLAST, subcarrier grouping, interference suppression and cancellation