taajuusmuutos
Taajuusmuutos, or frequency conversion, is the process of changing the frequency of a signal while preserving its information content. This shift can occur in electronic, optical, or digital domains and is a fundamental operation in communications, sensing, and signal processing.
In electronics, taajuusmuutos is typically performed with a nonlinear device such as a mixer that combines
In optics, taajuusmuutos occurs through nonlinear optical processes in crystals or waveguides. Methods include second-harmonic generation
In the digital domain, taajuusmuutos can be achieved by digitally mixing the signal with a complex exponential
Overall, taajuusmuutos is a versatile technique that enables interaction across frequency bands, supporting a wide range