Application of Conjugate Gradient Method for the Solution of Large Matrix Problems
The conjugate gradient method (CGM) has found a wide variety of applications in electromagnetics and in signal processing. In addition, CGM when used in conjunction with FFT (CGFFT) is extremely efficient for solving Hankel and Toeplitz or block Toeplitz matrix systems which frequently arise in both electromagnetics and signal processing applications. The FFT may be utilized because of the convolutional nature of the matrix. CGM has also been used in adaptive spectral estimation. In this paper, a novel application of the conjugation gradient method in the determination of far-field antenna patterns via a near-field to far-field transformation will be discussed.
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