离散时间序列的运算 (a)理想时延 yn]=x[n-dI (b)和与差 yn]=x[]±x2[] (c)相乘 yn]=x[]x2[ (d)标乘 yn]=axn (e)线性卷积 川=x*=∑n-k]=∑m-k] k (f)信号的分解: x小=∑k]n-k k=-00 另外还有移位、翻转和尺度变换一离散时间序列的运算 1 2 1 2 (a) : [ ] [ - ] (b) : [ ] [ ] [ ] (c) : [n] [ ] [ ] (d) : [ ] y n x n d y n x n x n y x n x n y n = =  = 理想时延 和与差 相乘 标乘 [ ] (e) : [ ] [ ] [ ] [ ] [ ] [ ] [ ] (f) : [ ] [ ] [ ] k k k ax n y n x n h n x k h n - k h k x n - k x n x k n - k    =− =−  =− = =  = = =    线性卷积 信号的分解 另外还有移位、翻转和尺度变换