Beteiligte: | , , , |
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In: | Research Letters in Communications, 2009, 2009, S. 1-4 |
veröffentlicht: |
Hindawi Limited
|
Medientyp: | Artikel, E-Artikel |
Umfang: | 1-4 |
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ISSN: |
1687-6741
1687-675X |
DOI: | 10.1155/2009/230276 |
veröffentlicht in: | Research Letters in Communications |
Sprache: | Englisch |
Schlagwörter: | |
Kollektion: | Hindawi Limited (CrossRef) |
<jats:p>Hybrid automatic repeat request (HARQ) is used in high-speed uplink packet access (HSUPA) to increase the data rate. Chase combining is the simplest of HARQ algorithms. It provides a time diversity and requires a small memory. In this paper, we propose a technique to increase the chase combining efficiency. In this method, HARQ transmissions are seen as additional receive antennas which are jointly combined at chip-level using a space-time linear minimum square error (LMMSE). We demonstrate that the chase combining diversity gain is considerably increased especially for high-order modulation.</jats:p> |