Transmit power allocation for BER performance improvement in multicarrier systems

In a multicarrier system, transmit power allocation over different subchannels is an effective means of improving the performance. We develop the optimal transmit power allocation scheme to improve bit-error rate (BER) performance in a multicarrier system with diversity reception. A simple suboptimal scheme is also derived from the optimal one, and an asymptotic case referred to as the equal-signal-to-noise ratio scheme is discussed. Numerical results show that the optimal and suboptimal power allocation schemes significantly outperform the equal power allocation scheme. The effects of the modulation level, the number of receiving antennas, and the number of subchannels on the BER performance are also investigated.

[1]  John M. Cioffi,et al.  Receive diversity for mobile OFDM systems , 2000, 2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540).

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

[3]  Andrea J. Goldsmith,et al.  Variable-rate variable-power MQAM for fading channels , 1997, IEEE Trans. Commun..

[4]  Richard R. Shively,et al.  An efficient bit-loading algorithm for DMT applications , 2000, IEEE Communications Letters.

[5]  Robert F. H. Fischer,et al.  A new loading algorithm for discrete multitone transmission , 1996, Proceedings of GLOBECOM'96. 1996 IEEE Global Telecommunications Conference.

[6]  I. M. Jacobs,et al.  Principles of Communication Engineering , 1965 .

[7]  J.E. Mazo,et al.  Digital communications , 1985, Proceedings of the IEEE.

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

[9]  John M. Cioffi,et al.  Spatio-temporal coding for wireless communication , 1998, IEEE Trans. Commun..

[10]  Thomas M. Cover,et al.  Elements of Information Theory , 2005 .

[11]  S. Thomas Alexander,et al.  Adaptive Signal Processing , 1986, Texts and Monographs in Computer Science.

[12]  A. Goldsmith,et al.  Adaptive multicarrier modulation for wireless systems , 2000, Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154).

[13]  Yong-Hwan Lee,et al.  Frequency-time domain transmit power adaptation for a multicarrier system in fading channels , 2001, 12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598).

[14]  Jun Young Jang,et al.  Frequency-time domain transmit power adaptation for multicarrier system in fading channels , 2002 .

[15]  E. Polak.  Introduction to linear and nonlinear programming , 1973 .

[16]  Hsuan-Jung Su,et al.  Power allocation and control for multicarrier systems with soft decoding , 1999, IEEE J. Sel. Areas Commun..

[17]  A. Goldsmith,et al.  Variable-rate variable-power MQAM for fading channels , 1996, Proceedings of Vehicular Technology Conference - VTC.

[18]  John M. Cioffi,et al.  A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels , 1995, IEEE Trans. Commun..