Designs of Differential Space-Time and Space-Frequency Coded OFDM Schemes

The simple differential designs on both space-time coded OFDM (STC-OFDM) and space-frequency coded OFDM (SFC-OFDM) are introduced when neither the transmitter nor the receiver has the channel state information. In the differential STC-OFDM (DSTC-OFDM) and the differential SFC-OFDM (DSFC-OFDM) systems, the block differential encodings are adopted in the time dimension and the frequency dimension, respectively. We give the detailed description and theoretical analysis of the two schemes. The effectiveness in achieving the transmitter diversity is illustrated by simulations in both slow and fast fading environments. By taking the advantage of the characteristics of the OFDM frame structure, the computational complexity of the introduced schemes is greatly reduced.

[1]  Lin Yang,et al.  A combined code acquisition and symbol timing recovery method for TDS-OFDM , 2003, IEEE Trans. Broadcast..

[2]  Meixia Tao,et al.  Differential space-time block codes , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

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

[4]  Douglas B. Williams,et al.  A space-frequency transmitter diversity technique for OFDM systems , 2000, Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137).

[5]  Hamid Jafarkhani,et al.  A differential detection scheme for transmit diversity , 2000, IEEE Journal on Selected Areas in Communications.

[6]  Douglas B. Williams,et al.  A space-time coded transmitter diversity technique for frequency selective fading channels , 2000, Proceedings of the 2000 IEEE Sensor Array and Multichannel Signal Processing Workshop. SAM 2000 (Cat. No.00EX410).

[7]  Vahid Tarokh,et al.  Differential space time block codes using nonconstant modulus constellations , 2003, IEEE Trans. Signal Process..

[8]  Thomas L. Marzetta,et al.  Unitary space-time modulation for multiple-antenna communications in Rayleigh flat fading , 2000, IEEE Trans. Inf. Theory.

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

[10]  Bertrand M. Hochwald,et al.  Differential unitary space-time modulation , 2000, IEEE Trans. Commun..

[11]  Brian L. Hughes,et al.  Differential space-time modulation , 1999, WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466).

[12]  P. Stoica,et al.  Differential modulation using space-time block codes , 2002, IEEE Signal Processing Letters.

[13]  A. Robert Calderbank,et al.  Space-Time block codes from orthogonal designs , 1999, IEEE Trans. Inf. Theory.

[14]  Hamid Jafarkhani,et al.  Multiple transmit antenna differential detection from generalized orthogonal designs , 2001, IEEE Trans. Inf. Theory.