论文信息 - A novel scheme for space-time block coding with variable transmit diversity gain in OFDM systems

A novel scheme for space-time block coding with variable transmit diversity gain in OFDM systems

A novel scheme for space-time block coding with a variable transmit diversity gain is proposed for OFDM systems. The OFDM symbols are divided into two groups of orthogonal sub-symbols with each group coded in Alamouli STBC in the coding, and the new scheme for STBC is constructed by differently combining the coded data of each group with the different transmit diversity gain able to be achieved by linearly processing and correspondingly combining the received data on the sub-carriers. The results of computer simulation show that the average SNR for the proposed scheme has been improved 6dB for the double diversity scheme and 10dB for the quadruple diversity scheme compared with the OFDM system without diversity when BER is 10/sup -2/.

Hui Zhang | Yilin Chang | Guangliang Ren

[1] Constantinos B. Papadias,et al. Capacity-approaching space-time codes for systems employing four transmitter antennas , 2003, IEEE Trans. Inf. Theory.

[2] R. Berezdivin,et al. Next-generation wireless communications concepts and technologies , 2002, IEEE Commun. Mag..

[3] John Terry,et al. OFDM Wireless LANs: A Theoretical and Practical Guide , 2001 .

[4] A. Robert Calderbank,et al. Space-time block coding for wireless communications: performance results , 1999, IEEE J. Sel. Areas Commun..

[5] Andreas F. Molisch. Wideband Wireless Digital Communications , 2000 .

[6] Pedro M. Crespo,et al. Hidden Markov models for burst error characterization in indoor radio channels , 1997 .

[7] David Gesbert,et al. From theory to practice: an overview of MIMO space-time coded wireless systems , 2003, IEEE J. Sel. Areas Commun..

[8] Xue-Bin Liang,et al. A high-rate orthogonal space-time block code , 2003, IEEE Commun. Lett..

[9] Siavash M. Alamouti,et al. A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[10] Thomas Stockhammer,et al. Feedback and error protection strategies for wireless progressive video transmission , 2002, IEEE Trans. Circuits Syst. Video Technol..