Adjacent Channel Interference occurs when signals from nearby frequency channels interfere with each other. This can happen in various communication systems, such as radio, television, and cellular networks. When two channels are close in frequency, the transmission from one can bleed into the other, causing distortion or loss of clarity in the received signal. This type of interference can degrade the quality of communication and lead to dropped calls or poor audio and video quality. To minimize adjacent channel interference, engineers often use techniques like frequency planning and filtering to ensure that channels are spaced adequately apart and that unwanted signals are reduced.