constant adj. 1.恒定不变的,固定的,稳定的,恒久的;继续不断的。 2.不屈不挠的,坚韧的。 3.忠实的,有节操的。 be constant in love 忠贞不渝的爱情。 two days of constant rain 两天接连下雨。 constant to one's duty 忠于职守。 constant wind 恒风。 n. 【数、物】常数,恒量;恒定(值);(常)系数,率;【语法】(转换语法用语)定项。 the circular constant圆周率。 adv. -ly
The constant modulus algorithm ( cma ) is the most widely used algorithm in digital communication systems due to its simplicity and robustness . in this paper we analysis the inherent limitation of cma which lead to a tradeoff between convergence rate and misadjustment , and propose several variable step size cma by putting variable step - size theories into cma . the convergence performance of the proposed algorithms is illustrated by computer simulations 本文对数字通信系统中广泛应用的bussgang类盲均衡算法? ?恒模算法( cma )进行了深入研究,分析了制约其性能进一步提高的因素,将变步长理论应用于恒模算法,提出了一系列恒模改进算法,并通过计算机仿真对改进算法的收敛性能进行了验证。