| TH-UWB系统中基于自适应算法的接收机研究 |
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| 引用本文： | 师小琳.TH-UWB系统中基于自适应算法的接收机研究[J].计算机应用,2008,28(5):1111-1113. |
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| 作者姓名： | 师小琳 |
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| 作者单位： | 西安邮电学院,电子与信息工程系,西安,710121 |
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| 基金项目： | 国家自然科学基金
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陕西省教育厅资助项目 |
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| 摘 要： | 提出了一种适用于跳时超宽带(TH-UWB)系统中的RAKE接收机方案。该方法利用基于梯度的可变遗忘因子的改进递推最小二乘(RLS)算法进行信道估计，并与基于经典RLS算法和基于最大似然概率(ML)算法的接收机方案进行对比。结果表明，这种新型RAKE接收机方案能够更有效地跟踪时变衰落信道的变化；在相同条件下，该方案能够提高系统性能，获得更小的误码率(BER)。
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| 关 键 词： | 跳时超宽带 RAKE接收机 递推最小二乘算法 |
| 文章编号： | 1001-9081(2008)05-1111-03 |
| 收稿时间： | 2007-11-26 |
| 修稿时间： | 2007年11月26 |
Research of adaptive receivers for TH-UWB systems |
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| SHI Xiao-lin.Research of adaptive receivers for TH-UWB systems[J].journal of Computer Applications,2008,28(5):1111-1113. |
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| Authors: | SHI Xiao-lin |
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| Affiliation: | SHI Xiao-lin(Department of Electronics , Information Engineering,Xi'an Institute of Posts , Telecommunications,Xi'an Shaanxi 710121,China) |
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| Abstract: | In this paper, a new RAKE receiver was proposed for Ultra-Wide-Band (UWB) wireless communication systems. The receiver was composed of modified recursive least square (RLS) filters, which used the gradient-based variable forgetting factor to track time-varying channels and hence provided better channel estimation than the typical RLS and Maximum Likelihood (ML) algorithms. The results show that the proposed receiver has better performance in tracking time-varying fading channels and it also helps obtain lower Bit Error Rate (BER) for UWB systems. |
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| Keywords: | Timing Hopping Ultra Wide Band(TH-UWB) RAKE receiver Recursive Least Square (RLS) algorithm |
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