Spectrum Sensing

Spectrum sensing is a technique used in wireless communication to detect whether a particular frequency band is currently in use or free. It helps devices identify open channels for transmitting data without interfering with existing users. Imagine it as a radio scanner that listens to a specific frequency to see if anyone is talking; if not, it can safely transmit its own message. This process is crucial for dynamic spectrum access, especially in cognitive radios, allowing more efficient use of available radio frequencies and reducing congestion.