: Low-power protocols like LoRaWAN, Zigbee, and Bluetooth Low Energy (BLE) designed for sensors that need to run for years on a single battery. Why Look for a "From the Ground Up" PDF?

Wireless communication refers to the transmission of information over a distance without the use of wires or cables. It involves the use of electromagnetic waves, such as radio waves, microwaves, or infrared waves, to transmit information between devices. Wireless communication systems consist of a transmitter, a receiver, and a communication channel. The transmitter converts the information into a signal, which is then transmitted over the communication channel to the receiver, where it is converted back into its original form.

To send data over a wireless link, a carrier wave must be modified to carry information. This process is called modulation. In analog systems, this might involve changing the amplitude or frequency of the wave. In modern digital systems, data is converted into bits and mapped onto the carrier wave using techniques like Phase Shift Keying or Quadrature Amplitude Modulation. These methods allow for the efficient transmission of high volumes of data, such as streaming video or complex web pages, over relatively narrow frequency bands. Antennas and Signal Propagation