基于离散Gabor变换和增量Wiener滤波器的冲击电压波形重构算法研究

分析了冲击电压经过数字化冲击测量系统后被测波形产生畸变的原因,讨论了因量化噪声造成波形反卷积重构的病态性.提出了一种基于离散Gabor变换和增量维纳滤波器的冲击电压波形重构方法,对IEC1083-2TDG波形计算结果表明该方法可以有效实现冲击电压数字化测量波形复原,具有较高的准确度和稳定性.

Algorithm of Reconstruction of High Voltage Impulse Waveform Based on Discrete Gabor Transform and Incremental Wiener Invert Filter

The reason that why digital impulse voltage measuring system introduces some distortion in measured input impulse voltage waveform is analyzed and the ill-posed character of deconvolution problem arising from quantization noise in waveform reconstruction is discussed. A method, which uses deconvolution technique based on discrete Gabor transform and incremental Wiener filter to perform reconstruction of digital high voltage impulse waveform, is presented in this paper. Simulated waveforms obtained by IEC1083?2 TDG processed by this method demonstrate that this algorithm approaches high accuracy and stability and satisfies the needs of reconstruction of digital high voltage impulse waveform.