Per tone blind signal separation for a DMT-DS-CDMA system

In this paper, we discuss a per tone blind signal separation method for a discrete multi-tone direct-sequence code-division multiple-access (DMT-DS-CDMA) system. We show that the use of a cyclic prefix reduces the inter-chip interference (ICI). As a result, when we increase the length of the cyclic prefix, using the minimal required amount of temporal smoothing, the computational complexity of the proposed method decreases. Moreover, we demonstrate that this reduction in computational complexity even comes with a performance improvement.

[1]  G. Leus,et al.  Per tone equalization for DMT receivers , 1999, Seamless Interconnection for Universal Services. Global Telecommunications Conference. GLOBECOM'99. (Cat. No.99CH37042).

[2]  G. Leus,et al.  A non-iterative blind signal separation algorithm based on transmit diversity and coding , 1999, Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020).

[3]  Elvino S. Sousa,et al.  Multicarrier orthogonal CDMA signals for quasi-synchronous communication systems , 1994, IEEE J. Sel. Areas Commun..