/96 Round-off Noise Mathematical Model:usually modeled as an infinite precision system with an external error input. Rounding is a nonlinear operation.But its effect at the output can be analyzed using linear system theory with the following assumptions about e(n): e(n)is uniformly distributed white noise; e(n)is a wide-sense stationary random process,i.e.,mean and co-variance are independent of time index n; x(n) e(n)is uncorrelated to all other signals such as input and other noise signals. e(n):round-off error 2021年2月 92021年2月 9  Round-off Noise Mathematical Model: usually modeled as an infinite precision system with an external error input.  Rounding is a nonlinear operation. But its effect at the output can be analyzed using linear system theory with the following assumptions about e(n):  e(n) is uniformly distributed white noise;  e(n) is a wide-sense stationary random process, i.e., mean and co-variance are independent of time index n;  e(n) is uncorrelated to all other signals such as input and other noise signals