Heterodyne detection involves mixing the signal of interest with a local oscillator signal to generate a new frequency. Homodyne detection, on the other hand, uses only the signal of interest without any mixing.
Differential detection involves comparing two signals, usually the received signal and a reference signal, to extract the desired information. This method is commonly used in communication systems to improve signal quality.
Normal detection is used to recover the original information from a modulated signal. It involves demodulating the signal using a detector circuit to extract the desired information.
The choice of detection method depends on the specific application and the type of signal being detected. Factors such as signal-to-noise ratio, bandwidth, and complexity of the signal can influence the selection of the most suitable detection method.
Yes, it is possible to combine different detection methods to improve the overall performance. For example, heterodyne and homodyne detection methods can be used together to achieve higher sensitivity and selectivity in detection applications.