| 摘要: |
| 提出了一种基于重叠变换的自适应干扰抑制算法，利用调制重叠变换（MLT）把接收机信号映射到变换域进行抗干扰处理，它可以有效地把干扰能量集中在有限的变换域子带（Transform Bins）中，与基于DFT、DCT等块变换相比有更好的滤波效果。由于可以使用基于重叠变换的快速算法，因此它结构简单，节省计算量。仿真结果表明，基于MLT的变换域处理方案可以有效地改善系统性能。 |
| 关键词: 扩频通信 调制重叠变换(MLT) 变换域处理 干扰抑制算法 滤波算法 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2005-11-10修订日期：2006-01-09 |
| 基金项目: |
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| Interference Excision in Digital Spread Spectrum Communication Systems Based on Modulated Lapped Transforms |
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| Abstract: |
| An adaptive algorithm based on modulated lapped transforms(MLT) restricting narrow-band interference is proposed.MLT is used to transform the received data signal to the transform domain wherein excision is performed.MLT can effectively isolate the interference energy to a small number of bins in the transform domain by division of the signal spectrum.Comparied to DFT and DCT,MLT has more characteristics of filter.Because of existing fast algorithm,it has the advantage of low computational complexity and simple structure while not losing in filtering performance.Simulation results demonstrate that transform domain excision technique based on MLT can significantly improve the system performance. |
| Key words: spread spectrum communications MLT transform domain excision intereference algorithm filter algorithm |
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