After each chapter, there will be some systematic combing and exercises. This can not only clarify the context of the whole chapter, but also do exercises to consolidate it. The recommended problem set is Zheng's Signal and System Problem Analysis, which is very helpful for the understanding of the course.
2. It is necessary to clarify the relationship between the chapters and establish contact with some previously learned knowledge and disciplines, so as to truly learn the course of Signal and System thoroughly.
Signals and systems are so difficult to learn because:
1, need enough advanced mathematics foundation: the solution of constant coefficient differential equation, calculus operation.
2. It needs a certain complex function foundation: complex operation and integral transformation.
3, it is more abstract: it is completely different from the analog electricity you learned in the past.
4, its physical meaning is difficult to grasp: it will give you an illusion that it is a branch of mathematics in engineering.
5. Its own operation is different from mathematics. For example, the differential equation with 0-value undetermined coefficient can't work here.