Fractionally spaced equalization of linear polyphase channels and related blind techniques based on multichannel linear prediction

In this paper, we consider the problem of linear equalization of polyphase channels and its blind implementation. These channels may result from overs ampling the single output of a transmission channel or/and by receiving mul tiple outputs of an antenna array. A number of recent contributions in the field of blind channel identification have shown that polyphase channels ca n be blindly identified using only second-order statistics (SOS) of the out put. In this work, we are mostly interested in the blind linear equalizatio n of these channels: After some elaboration on the specifics of the equaliz ation problem for polyphase channels, we show how optimal settings of vario us well-known types of linear equalization structures can be obtained blind ly using only the output's SOS by using multichannel linear prediction or r elated techniques.