Abstract
Various differential space-time coding schemes were proposed, where neither the transmitter nor the receiver has the channel state information (CSI). In [1], a differential space-time block code (DSTBC) based on orthogonal designs was constructed by Tarokh and Jafarkhani (TJ). The performance of TJ'DSTBC is 3 dB worse than the corresponding coherent space-time block code (STBC). In this paper, we propose a new DSTBC scheme, which provides a coding gain due to the redundancy introduced by the differential encoder. The new code can be represented by a trellis. If the Viterbi algorithm is used in decoding, the code performs 1 dB better than TJ's scheme and is only 2 dB away from the coherent STBC [2]. Furthermore, the new scheme has a recursive structure. If concatenated with an outer code, the new scheme with iterative decoding and no CSI can outperform the corresponding concatenated STBC with ideal CSI.
| Original language | English |
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| Number of pages | 1 |
| Publication status | Published - 20 Oct 2003 |
| Externally published | Yes |
| Event | IEEE International Symposium on Information Theory 2003 - Yokohama, Japan Duration: 29 Jun 2003 → 4 Jul 2003 https://ieeexplore.ieee.org/xpl/conhome/8703/proceeding (Proceedings) |
Conference
| Conference | IEEE International Symposium on Information Theory 2003 |
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| Abbreviated title | ISIT 2003 |
| Country/Territory | Japan |
| City | Yokohama |
| Period | 29/06/03 → 4/07/03 |
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