Antenna Array Interference Cancellation for OFDM Based on Parametric Modeling of the Weights
01 January 2001
The problem of antenna array interference cancellation in an OFDM system is addressed. Sparse Co-Channel Interference (SCCI) model is derived, which reflects scenarios when different symbols and subcarriers of the desired signal may be affected by different CCI. Joint interpolation-estimation approach for antenna array weights is formulated, which is based on parametric modeling of the weights in a frequency domain. Using this approach, the training-based and semi-blind optimization criteria and algorithms are developed. It is demonstrated by simulations that the proposed semi-blind techniques allows effective suppression of the SCCI. The simulation scenarios include the HIPERLAN/2 propagation channel.