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EnglishWe consider the use of linear constellation precoding and linear equalization in a multicarrier system to obtain improved performance over multipath fading channels at a low complexity. We split the full set of subcarriers into smaller groups and spread the data symbols assigned to each group via precoding matrices. To obtain diversity order gains at a given data rate, we derive the optimal split of the subcarriers (optimal grouping) and the optimal number of symbols assigned to each group (optimal loading) using a diversity-multiplexing tradeoff analysis. We also derive the necessary and sufficient optimality conditions for the precoder design and provide examples of such optimal precoders.
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| Titolo: | Diversity-multiplexing trade-off analysis of OFDM systems with linear detectors |
| Autori: | |
| Data di pubblicazione: | 2007 |
| Abstract: | We consider the use of linear constellation precoding and linear equalization in a multicarrier system to obtain improved performance over multipath fading channels at a low complexity. We split the full set of subcarriers into smaller groups and spread the data symbols assigned to each group via precoding matrices. To obtain diversity order gains at a given data rate, we derive the optimal split of the subcarriers (optimal grouping) and the optimal number of symbols assigned to each group (optimal loading) using a diversity-multiplexing tradeoff analysis. We also derive the necessary and sufficient optimality conditions for the precoder design and provide examples of such optimal precoders. |
| Handle: | http://hdl.handle.net/11580/5136 |
| ISBN: | 9781424410439 |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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