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首页> 外文期刊>IEICE Transactions on Communications >Narrow-band interference suppression in CDMA spread-spectrum communication systems based on sub-optimum unitary transforms
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Narrow-band interference suppression in CDMA spread-spectrum communication systems based on sub-optimum unitary transforms

机译:基于次优unit变换的CDMA扩频通信系统中的窄带干扰抑制

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摘要

In this paper, we present several unitary transform-domain filtering techniques based on Karhaunen- Loeve Transform(KLT)for narrow-band interference rejection In CDMA communication systems. The reason for selecting the KLT is that it is an optimum unitary transform in the sense of Packing the energy of the narrow-band interference. As a result After applying this transform, a small portion of the transformed Signal would be interfered by the narrow-band interference, and Thus must be set to zero. Due to unavailability of the optimum Transform(KLT), several sub-optimum transforms are presented And their performances are compared with the well-known con- Ventional transform methods such as Discrete Fourier Transform (DFT)and Discrete Cosine Transform(DCT)in the presence of both Auto Regressive(AR)and sinusoidal narrow-band interfer- ence. Our simulation results show that the proposed transform methods significantly outperform the conventional methods.
机译:在本文中,我们提出了几种基于Karhaunen-Loeve变换(KLT)的单一变换域滤波技术,用于CDMA通信系统中的窄带干扰抑制。选择KLT的原因是,从压缩窄带干扰的能量的角度来看,它是最佳的unit变换。结果,在应用此变换后,一小部分已变换的信号将受到窄带干扰的干扰,因此必须将其设置为零。由于无法获得最佳变换(KLT),因此提出了几种次优变换,并将它们的性能与众所周知的传统变换方法(例如离散傅里叶变换(DFT)和离散余弦变换(DCT))进行了比较。同时存在自回归(AR)和正弦窄带干扰。我们的仿真结果表明,提出的变换方法明显优于常规方法。

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