关键词: 多载波扩频, 单音干扰, 参数估计, 谱线

Abstract: 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.

Key words: multi-carrier spread spectrum, single tone jamming, parameter estimation, spectra line