Development of a digital amateur radio protocol based on OFDM. MAC and LLC layers

In the latest installment of the article series on creating a digital amateur radio protocol based on OFDM technology, the author moves from the physical layer (PHY) to the design of the Media Access Control (MAC) and Logical Link Control (LLC) layers. The focus is on implementing a half-duplex network connection between two transceivers. The article details the architectural principles behind these layers and analyzes practical challenges encountered during development. The author shares solutions to technical difficulties that ensure stable data transmission in amateur radio environments. This material is intended for engineers and enthusiasts interested in digital signal processing and wireless data transmission protocols.