On blind equalization of single-input multiple-output channels using second-order statistics

The problem of blind equalization of SIMO (single-input multiple-output) communications channels is considered using only the second-order statistics of the data. Such models arise when a single receiver data is fractionally sampled (assuming that there is excess bandwidth), or when an antenna array is used with or without fractional sampling. We focus on direct design of finite-length blind equalizers. Unlike the past work on this problem, we allow infinite impulse response (IIR) channels. Our approach also works when the "subchannel" transfer functions have common zeros so long as the common zeros are minimum-phase zeros. Illustrative simulation examples are provided.