| 摘要: |
| 空时码在准静态平坦瑞利衰落信道下的设计准则被广泛采用的是秩准则和行列式准则,但这些准则并不是很紧的。为此,提出了准静态平坦瑞利衰落信道下一种新的更紧的设计准则,采用这种准则还大大降低了穷举搜索空时好码的复杂度,仿真结果表明,搜索得到的空时好码性能优于现有的其它好码。 |
| 关键词: 无线通信,发分集,空时码,瑞利衰落信道 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:March 26, 2003 |
| 基金项目:国家自然科学基金资助项目(60172051) |
|
| A New Design Criterion for Space-Time Codes Under Quasi-Static Flat Rayleigh Fading Channel |
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| Abstract: |
| The design criteria for space-time codes under block fading channels are the rank criterion and the determinant criterion, which are widely cited in the literature. These criteria are not very tight under some circumstances. In this paper,a tighter design criterion for space-time codes is derived. Based on the criterion,good space-time codes are found by computer search. The complexity of systematic search for good space-time codes is a big obstacle to get good codes. Using our new design criterion, the complexity of search is dropped down dramatically. Simulations show that the new codes have superior performance over the existing codes. |
| Key words: Wireless communications,Transmit diversity,Space-time code,Rayleigh fading channel |
