Analog Processing Lecture 1

Analog Processing

• Analog processing involves differentiation, integration, filtering, and amplification
• Implemented using passive or active electronic circuitry consisting of resistors, capacitors, and inductors
• Analog processing is used to extract useful signals from received signals

Received Signal and Noise

• Received signal r(t) consists of useful signal s(t) and unwanted noise n(t): r(t) = s(t) + n(t)
• Main function at the receiver is to extract useful signal s(t) or obtain its estimate from received signal r(t)

Analog Low Pass Filter (LPF)

• Analog LPF is used to reduce high-frequency noise and extract useful signal component
• LPF processing generates an estimate of useful signal ŝ(t) from received signal r(t)

Limitations of Analog Signal Processing

Accuracy Limitations

• Component tolerances affect accuracy
• Undesired nonlinearities affect accuracy

Limited Repeatability

• Tolerances affect repeatability
• Environmental changes (temperature, vibration) affect repeatability