| 摘要: |
| 在直接序列扩频(DSSS)通信系统中,经常需要对窄带干扰进行抑制,但频域LMS算法的运算量限制了它在高速实时系统中的应用。本文介绍了该算法的结构,并且结合TMS320C6000系列DSP的特点,提出了该算法的优化方案。利用DSP的并行运算能力,缩短了FFT和权值更新的运行周期,因此优化后的算法很容易达到实时性。 |
| 关键词: 直接序列扩频通信 最小均方 快速傅里叶变换 直接存储器访问 多通道缓冲串口 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2004-11-15 |
| 基金项目:广东省工业科技攻关项目 |
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| Implementation of a Frequency-domain LMS Algorithm on TMS320C6701 |
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| Abstract: |
| It is often required to suppress narrowband interferences(NBI) in Direct Sequence Spread Spectrum(DSSS) communication systems,but the complexity of the frequency-domain LMS algorithm confines its application in high-speed and real-time system.The structure of the algorithm is introduced,and combined with the characteristic of TMS320C6701 DSP an optimized scheme is presented.Using the parallel operation capability of DSP,the operation cycles of FFT and tap-weight update can be shorten and the real-time capability of the optimized algorithm can be easily met. |
| Key words: DSSS communication,LMS(Least Mean Square),FFT,DMA,MCBSP |
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