M-Group – Achieving and Optimizing Full Duplex Wireless Communication

Contact
Bozheng Pang – bozheng.pang@kuleuven.be

Category
Electronics

Context

Wireless communication has rapidly evolved and is now extensively employed in diverse domains. A fundamental assumption of wireless communication is that radios cannot transmit and receive signals on the same frequency simultaneously. Therefore, wireless communication typically operates in half duplex mode, meaning that radios can only either transmit or receive signals on the same frequency at a given time. However, half duplex wireless communication is not always efficient, as it requires dividing resources such as frequency and time. In theory, full duplex wireless communication should be able to double the efficiency of half duplex wireless communication.

However, achieving full duplex wireless communication is much more complicated than achieving half duplex wireless communication. The main challenge is reducing self interference. Since full duplex wireless communication requires signal transmission and reception at the same frequency at the same time, these two signals naturally interfere with one another, especially in full duplex wireless communication. What makes self interference even worse is the huge difference between the transmission and reception signals. As wireless signals attenuate quickly over distance, the signal from a local transmission antenna is hundreds/thousands of times stronger than the received signal transmitted by other nodes. As a result, to achieve full duplex wireless communication, self interference is the main challenge that needs to be solved.

Objectives

• Designing a circuit that is possible to reduce the self interference in full duplex wireless communication
• Achieving a prototype of full duplex wireless communication through the designed circuit
• Testing and optimizing the achieved full duplex wireless communication prototype