A MMSE successive interference cancellation scheme for a new adjustable hybrid spread OFDM system

The effects of uniform spreading in OFDM-CDMA systems is the harmonization at the reception of the signal to noise ratio between the sub-bands which prevents the good performance of successive decoding algorithms. This paper proposes a new hybrid spread OFDM (SOFDM) transmission scheme in which the spreading of the information is adjustable and not uniform along the carrier (frequency selective). Moreover a MMSE version of the V-BLAST successive interference cancellation algorithm suited for this hybrid modulator is derived. The performance of the combination of SHOFDM and MMSE V-BLAST is shown to both outperform COFDM and conventional and classical iterative detection algorithms for SOFDM in the realistic scenario of the 5 GHz HiperLAN/2 system.

[1]  K. Fazel.  Performance of CDMA/OFDM for mobile communication system , 1993, Proceedings of 2nd IEEE International Conference on Universal Personal Communications.

[2]  Reinaldo A. Valenzuela,et al.  V-BLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel , 1998, 1998 URSI International Symposium on Signals, Systems, and Electronics. Conference Proceedings (Cat. No.98EX167).

[3]  B. Achiriloaie,et al.  VI REFERENCES , 1961 .

[4]  S. Kaiser.  Trade-off between channel coding and spreading in multi-carrier CDMA systems , 1996, Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications.

[5]  H. Vincent Poor,et al.  Probability of error in MMSE multiuser detection , 1997, IEEE Trans. Inf. Theory.

[6]  Sergio Verdu,et al.  Multiuser Detection , 1998 .

[7]  J.A.C. Bingham,et al.  Multicarrier modulation for data transmission: an idea whose time has come , 1990, IEEE Communications Magazine.

[8]  Werner G. Teich,et al.  Iterative detection algorithms for extended MC-CDMA , 1998, 1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333).