首页> 外文会议>International Conference on Signal Processing(ICSP'06); 20061116-20; Guilin(CN) >TONE INTERFERENCE SUPPRESSION IN DS-SS SYSTEMS WITH MODIFIED DISCRETE FOURIER TRANSFORM
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TONE INTERFERENCE SUPPRESSION IN DS-SS SYSTEMS WITH MODIFIED DISCRETE FOURIER TRANSFORM

机译:修正离散傅里叶变换的DS-SS系统中的音调干扰抑制

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摘要

The performance of traditional interference excision method based on the discrete Fourier transform (DFT) in direct sequence spread spectrum (DS-SS) system varies significantly with the frequency of the interference due to the grid biases of the DFT operation. This paper presents a new excision method by using modified DFT (MDFT) with an extra parameter to enhance the BER performance for a large range of interference to signal ratio (ISR). With the tradeoff between the energy of the remaining interference and the distortion of the desired signal, simulation results are presented to show that removing the peak of the components in the MDFT domain yields the best performance.
机译:在直接序列扩频(DS-SS)系统中,基于离散傅里叶变换(DFT)的传统干扰消除方法的性能由于DFT操作的网格偏置而随干扰频率的变化而显着变化。本文提出了一种新的切除方法,该方法通过使用带有附加参数的改进DFT(MDFT)来提高BER性能,以应对较大的信噪比(ISR)。通过在剩余干扰的能量和所需信号的失真之间进行折衷,仿真结果表明,去除MDFT域中的分量峰值会产生最佳性能。

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