Convolution
Historically, signal processing in the time domain has been avoided and the equivalent operation carried out in the complex frequency domain. As electronics becomes increasingly digital, modern signal-processing methods compel engineers to revise traditional techniques and concentrate on discrete-time models of sampled-data systems and signals. This approach is particularly rewarding because it unifies the signal-processing operations in the time and frequency domains, in addition to providing extraordinary insight into the operation of computers as real-time control components.
Don’t be discouraged or intimidated by the concept of a time or frequency domain model: these are simply alternative descriptions of a signal or linear ...
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