The Order-Number Dependence of Burg Spectrum and Choice of Optimum Regularization Parameter
The power spectrum of the signal polluted with the white noise is analysed by Burg method,and its result is compared with the periodogram method.When the ratio of the order-number is little,Burg spectrum is over-smooth and the signal is covered by the noise;with the increase of the order-number,the resolution increases too. When the order-number further increases,the false peak occurs and gradually increases,so that the signal is submerged by the noise.The results show that there must be an order-number and the best quality in burg spectrum near this order number;meanwhile,it is indicated that this order-number is just the optimum regularization parameter,just to further consider NCP of the residual and K-S limit,the optimum regularization parameter may be detemined.