Channel Identification for Block Transmission

In this paper, we first review popular schemes for block transmission within the framework of affine precoding. We then briefly present existing channel identification techniques tha t only rely on the redundant symbols introduced by these block transmission schemes. We then present the major contribution of this paper, which is a new stochastic channel identification method suited for Non-Zero Padded (NZP) block transmission, a special case of Known Symbol Padded (KSP) block transmission. This new stochastic method is iterative and takes into account both th e knowledge of the padded symbols and the expected structure of the unknown data symbols. We compare this new method with existing channel identification methods for block transmission. Experimental results show that the new method performs better than the existing ones and has a lower complexity.

[1]  Robert W. Heath,et al.  Exploiting input cyclostationarity for blind channel identification in OFDM systems , 1999, IEEE Trans. Signal Process..

[2]  M. Moonen,et al.  Semi-blind channel estimation for block transmissions with non-zero padding , 2001, Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256).

[3]  Anna Scaglione,et al.  Performance analysis of a deterministic channel estimator for block transmission systems with null guard intervals , 2002, IEEE Trans. Signal Process..

[4]  Luc Deneire,et al.  Training sequence vs. cyclic prefix a new look on single carrier communication , 2000, Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137).

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

[6]  Georgios B. Giannakis,et al.  Wireless multicarrier communications , 2000, IEEE Signal Process. Mag..

[7]  Hui Liu,et al.  Blind carrier synchronization and channel identification for OFDM communications , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[8]  Iven M. Y. Mareels,et al.  Affine precoders for reliable communications , 2000, 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100).