Abstract
In a multiple-input multiple-output (MIMO) multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) system, coherent detection where the channel state information (CSI) is assumed to be exactly known at the receiver requires the transmission of a large number of symbols for channel estimation, thus reducing the bandwidth efficiency. This paper examines the use of unitary differential space-time frequency codes (DSTFCs) in MB-OFDM UWB, which increases the system bandwidth efficiency due to the fact that no CSI is required for differential detection. The proposed DSTFC MB-OFDM system would be useful when the transmission of multiple channel estimation symbols is impractical or uneconomical. Simulation results show that the application of DSTFCs can significantly improve the bit error performance of conventional differential MB-OFDM system (without MIMO).
| Original language | English |
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| Title of host publication | 2009 9th International Symposium on Communications and Information Technology |
| Number of pages | 6 |
| Place of Publication | Icheon, South Korea |
| Publisher | IEEE |
| Publication date | 01.09.2009 |
| Pages | 1161-1166 |
| Article number | 5341104 |
| ISBN (Print) | 978-1-4244-4521-9 |
| ISBN (Electronic) | 978-1-4244-4522-6 |
| DOIs | |
| Publication status | Published - 01.09.2009 |
| Event | 9th International Symposium on Communications and Information Technology - Icheon, Korea, Republic of Duration: 28.09.2009 → 30.09.2009 Conference number: 79066 |
