WLC21-1: Improved High-rate Space-Time-Frequency Block Codes

High-rate space-time-frequency block codes (STFBC) are promising for achieving high bandwidth efficiency, low overhead and latency. Recently, a class of low-complexity STFBC methods based on two stages of complex diversity coding (CDC) have been proposed, known as double linear dispersion STFC(DLD-STFC). This paper investigates two issues related to the performance improvement of high-rate STFCs. First, it is shown that the two CDC stages of DLD-STFC can be interchanged. Two new diversity concepts for analysis of 3-dimensional DLD-STFC are introduced: per dimension diversity order and per dimension symbol-wise diversity order. A sufficient condition for DLD-STFC to achieve full symbol-wise diversity order is provided despite the existence of two CDC stages. Second, the gain obtainable in combining CDC with forward error correction (FEC) for STFC designs is quantified. Through simulations, it is shown that STFC based on the proper combination of CDC and FEC may outperform a variety of other STFC combinations, especially in spatially correlated channels. Further, the choice of the mapping from FEC to DLD-STFC may significantly impact system performance.

[1]  Steven D. Blostein,et al.  High-rate codes over space, time, and frequency , 2005, GLOBECOM '05. IEEE Global Telecommunications Conference, 2005..

[2]  K. J. Ray Liu,et al.  Diversity analysis of space-time modulation over time-correlated Rayleigh-fading channels , 2004, IEEE Transactions on Information Theory.

[3]  Ryuji Kohno,et al.  Space-Time-Frequency Turbo Code over Time-Varying and Frequency-Selective Fading Channel , 2005, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

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

[5]  Georgios B. Giannakis,et al.  Linear constellation-precoding for OFDM with maximum multipath diversity and coding gains , 2001, Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256).

[6]  Xiang-Gen Xia,et al.  High-rate full-diversity space-time-frequency codes for MIMO multipath block-fading channels , 2005, GLOBECOM '05. IEEE Global Telecommunications Conference, 2005..

[7]  Olav Tirkkonen.  Maximal symbolwise diversity in non-orthogonal space-time block codes , 2001, Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252).

[8]  Georgios B. Giannakis,et al.  Linear constellation-precoding for OFDM with maximum multipath diversity and coding gains , 2001 .

[9]  Babak Hassibi,et al.  High-rate codes that are linear in space and time , 2002, IEEE Trans. Inf. Theory.

[10]  Ari Hottinen,et al.  Improved MIMO performance with non-orthogonal space-time block codes , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[11]  Steven D. Blostein,et al.  Linear dispersion over time and frequency , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[12]  Georgios B. Giannakis,et al.  Space-time diversity systems based on linear constellation precoding , 2003, IEEE Trans. Wirel. Commun..

[13]  Dirk T. M. Slock,et al.  Multi-stream coding for MIMO OFDM systems with space-time-frequency spreading , 2002, The 5th International Symposium on Wireless Personal Multimedia Communications.