Zero-forcing Cosine Modulated Filterbank Transceivers with Cyclic Prefix

The DMT transceivers have enjoyed great success in high speed data transmission. The DMT scheme is realized by a transceiver that divides the frequency selective channel into a set of frequency nonselective parallel subchannels. The efficiency of the scheme depends on the frequency selectivity of the transmitting and receiving filters. In the past, the filterbank transceiver has been proposed as an implementation of DMT transceiver that has better frequency band separation. But usually ISI can not be completely cancelled in these filterbank transceivers and additional equalization is required. In this paper, we show how to obtain zeroforcing cosine modulated filterbank transceivers by introducing cyclic prefix at the transmitter. The proposed systems have the advantages of having good frequency separation and simple equalization. ISI can easily be elimination by exploiting the cyclic prefix and good frequency band separation is attained through the use of cosine modulated filter banks.