National Council of Examiners for Engineering and Surveying (NCEES) Fundamentals of Engineering (FE) Electrical and Computer Practice Exam

In a signal processing system, the fundamental components include the input signal, processor, and output signal.

The input signal is the raw data or information that needs to be processed. It can be in various forms, such as electrical, optical, or acoustic signals. The processor is where the actual manipulation and processing of the input signal occur. This could involve filtering, amplification, modulation, or any other form of transformation needed to extract meaningful information or adjust the signal for better transmission or analysis. Finally, the output signal is the result of the processing, which is delivered as a modified version of the input, containing the information desired after processing.

This framework serves as the foundation for various applications of signal processing, regardless of the specific technology or industry. Other options provided include specific elements often used in signal processing, like sensors and amplifiers or transmitters and receivers, which are components but do not encompass the complete framework necessary to describe the entirety of a signal processing system. Thus, they do not represent the core structure as explicitly as the combination of input signal, processor, and output signal does.