The transmission of digital signals involves sending information represented in binary format (0s and 1s) over a communication medium. Here’s how it typically works:

Encoding: The original information (such as voice, text, or video) is converted into a digital format through a process called encoding. This involves converting the analog signal into a series of binary numbers.

Modulation (if necessary): To effectively transmit digital signals over certain media (like radio waves), modulation techniques may be used. Modulation changes the properties of a carrier wave (such as its amplitude or frequency) to encode the digital information.

Transmission Medium: Digital signals can be transmitted over various mediums, including:

• Copper Cables: Twisted pair or coaxial cables are commonly used for telephone and cable TV services.
• Fiber Optic Cables: Light signals are transmitted through fiber optic cables, offering high-speed and long-distance communication.
• Wireless Channels: Digital signals can also be transmitted wirelessly through radio waves, as seen in Wi-Fi and mobile networks.

Receiving and Decoding: At the receiving end, the digital signal is detected, demodulated (if applicable), and decoded back into its original format for use by devices like computers, phones, or televisions.

Some of digital signal's applications are:

1. Watches: Digital and smart watches used digital signals.
2. Mobile Phones: All mobile phones process lots of digital signals. They process our speech digitally to remove background noise, echo, etc. They improve the quality of the images you click using digital image processing.