By Zahoor Ahmed
In commercial wireless communication system, most radios operate in time division duplex (TDD) mode that cannot transmit and receive at the same time in the same frequency band. We present a type of Gaussian degraded relay channel with nodes using light radios.The achievability of Gaussian degraded light relay channel is proved by using superposition encoding and successive decoding techniques. The converse is derived using the min-cut max-flow theorem for networks with light nodes. Our work of capacity analysis shows that even with light radios, our technique of coding is beneficial and has the advantage of capacity over direct transmission.