各位辛苦，我在做一個(gè)對(duì)數(shù)正太分布的陰影衰落仿真。協(xié)議中初始的陰影衰落矩陣描述如下：

•     Shadowing (in log domain): S(0) – NxN i.i.d. (with the exception that shadowing between two vehicles should be the same in the two directions) normal matrix generated as per agreed shadowing model

我現(xiàn)在的理解是要產(chǎn)生N*N獨(dú)立的正太分布的矩陣，但是對(duì)其中的normal matrix不理解，麻煩各位知道的告訴我一下。