应用于激电勘探的m序列相关辨识差分算法

M-sequence correlation identification difference algorithm applied to IP prospecting

m序列与随机噪声相关程度很低,因而具有抗干扰性能。在激电勘探应用中,传统m序列相关辨识时域公式在过采样、大位宽的情况下与理论值不符,因此推导出一种在τ<Δt范围计算冲激响应的差分算法,并通过Cole-Cole时域激电模型的数值模拟验证了该算法的正确性,为m序列相关辨识在激电勘探中的应用提供了一种新的思路。

The m-sequence has anti-interference performance since it is weakly correlated to the random noise. Traditional m- sequence time domain identification formula does not fit the theoretical value well under the situation of oversampling and large bit width, thus we deduces a difference algorithm of impulse response when time is limited to the bit width, then it is verified by the nu- merical simulation of the Cole-Cole time domain tP model. So this new algorithm may provide a new clue for m-sequence identification and its application in IP exploration.