In this example, cosine of uniform random matrix multiplied by a triangular time varying standard deviation as noise, and Sinc pulse time varying as a base band signal are summed to form a PM signal.

• 本例以均匀随机变数矩阵之馀弦乘以标准差为三角波时变代表杂讯，及时变滤波函数脉波代表基频讯号，合成基频讯号及杂讯和之相位调变讯号。