信号功率 L2-1 P 2-Ld ∑[d(2m-1)]2/2=a2 6 6 p L2-1 3 P=(1-7)er/e( 1/2 D2-1 D5 信号功率 6 1 [ (2 1)] / 2 2 2 2 / 2 1 2 − =  − = = L d m d L p L m s 1 6 2 2 − = L p d s 1/ 2 2 ) 1 3 ) ( 1 (1 r L erfc L pe − = − 2 n ps r  =