一种精确估计多载波扩频系统中单音干扰参数的新方法

A novel scheme for accurate estimation of single tone jammingparameters in a multi-carrier spread spectrum system

提出了一种精确估计多载波扩频系统中单音干扰参数的新方法,利用解调解扩中离散傅里叶变换(DFT)的计算结果,通过选取其中能量最大的两条谱线进行分析,能够对单音干扰的频率、振幅以及初始相位等参数进行精确的估计.该方法复杂度低,并可弥补常规方法仅采用单条最大能量谱线进行参数估计的不足.仿真实验表明,该方法具有速度快、精度高、参数估计全面的优点.

A new scheme for accurate estimation of single tone jamming parameters in a multi-carrier spread spectrum system is presented. Base on the results computed by the Discrete Fourier Transform(DFT) in demodulation and dispreading, the scheme can estimate accurately the parameters such as frequency, amplitude and initial phase of single tone jamming by analyzing two spectra lines having higher energy than other. The scheme has low complexity and can overcome the shortcomings of common methods which adopt only the single spectra line having maximum energy to estimate single tone jamming parameters. Simulation results show that the scheme has some advantages such as short computation time and high precision and can estimate all parameters.