Power Loading for OFDM with Incomplete Channel State Information

The paper addresses the problem of BER-minimizing power loading strategies for OFDM-based transmission systems where the channel state information at the transmitter is available only in terms of the "strong" and "weak" sub-carriers. We propose an algorithm of unequal power distribution between the "strong" and "weak" halves of sub- carriers. The theoretical background and simulation results confirm efficiency of the proposed power loading technique based on incomplete channel state information.

[1]  R. Gallager.  Information Theory and Reliable Communication , 1968 .

[2]  Hui Liu,et al.  OFDM-Based Broadband Wireless Networks – Design and Optimization , 2005 .

[3]  Jorge Campello De Souza,et al.  Optimal discrete bit loading for multicarrier modulation systems , 1998 .

[4]  迪克·胡斯·哈托格斯.  Ensemble modem structure for imperfect transmission media , 1986 .

[5]  Dongweon Yoon,et al.  On the general BER expression of one- and two-dimensional amplitude modulations , 2002, IEEE Trans. Commun..

[6]  Chi-Ying Tsui,et al.  A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission , 1999, Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).

[7]  Douglas L. Jones,et al.  Computationally efficient optimal power allocation algorithms for multicarrier communication systems , 2000, IEEE Trans. Commun..

[8]  Davide Dardari,et al.  Ordered subcarrier selection algorithm for OFDM-based high-speed WLANs , 2004, IEEE Transactions on Wireless Communications.

[9]  J. Campello.  Practical bit loading for DMT , 1999, 1999 IEEE International Conference on Communications (Cat. No. 99CH36311).

[10]  Gordon L. Stuber,et al.  Principles of Mobile Communication , 1996 .

[11]  Douglas L. Jones,et al.  Computationally efficient optimal power allocation algorithm for multicarrier communication systems , 1998, ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220).

[12]  Natalia Y. Ermolova.  Low Complexity Power Loading Strategies in OFDM-Based Transmission Systems , 2006, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications.

[13]  Wei Yu,et al.  Constant-power waterfilling: performance bound and low-complexity implementation , 2006, IEEE Transactions on Communications.

[14]  Nj Piscataway,et al.  Wireless LAN medium access control (MAC) and physical layer (PHY) specifications , 1996 .

[15]  Marco Chiani,et al.  New exponential bounds and approximations for the computation of error probability in fading channels , 2003, IEEE Trans. Wirel. Commun..