Therefore, the blind beamforming algorithm could keep up with the moving targets more quickly, which is important in practical communication systems . furthermore, the recursive cma to fast track several cm targets is provided . the simulation results show that it takes about one seventh of the time for the recursive algorithm to track the targets than that of the traditional algorithm 针对多个恒模用户信号,具体给出了快速跟踪移动目标的递归恒模算法,计算机仿真结果表明,使用新算法跟踪移动目标所花费的时间是传统算法独立地进行每一次波束形成所花费时间的七分之一。
The fma need the high order hankel function, in chapter 3 the algorithm of calculating the high order hankel function of the second kind is discussed . because of the low effectivity and unsteadiness to use the recursive algorithm to calculate the high order hankel function of the second kind, the paper introduces a kind of new fast algorithm to solve the problem . the worked result indicates : the new fast algorithm is a kind of precise algorithm 由于快速多极子法计算中要用到高阶汉克尔函数,在第三章中,主要针对利用递推算法求解高阶汉克尔函数时速度较慢和可能存在不稳定的问题,给出一种快速计算高阶汉克尔函数方法,最后给出了用快速多极子法计算的四个导体柱体散射截面。
In this dissertation, diffraction on one-dimensional period anisotropic gratings with arbitrary profile and arbitrary optical axis orientation, illuminated at an arbitrary incidence angle, is analyzed by using rigorous modal theory, and fourier factorization rules and recursive algorithm of reflection-transmission coefficient matrix ( rtcm ) are used in order to improve stability and convergence of numerical calculation 本文对任意面形、任意入射条件、任意光轴取向的一维各向异性周期光栅的衍射作了严格模式理论分析,并采用傅立叶因式分解和反射透射系数阵递推算法以提高数值计算的稳定性和收敛速度。