Future wireless communication systems are expected to provide more stable and higher data rate transmissions in the whole network. Recent research shows that it is advantageous to use relay stations in wireless networks in order to satisfy that need. But due to the limited power supply of mobile users, it may be difficult for the users to act as relays. Thus placing additional fixed relay stati...

Terrestrial Digital Multimedia Broadcasting (TDMB) is one popular broadcasting standard that enable digital television transmissions to hand held receivers and cooperative system take advantage of the broadcast nature of wireless channels, uses relay stations as virtual antennas. Relay stations are an attractive solution to penetrate the wireless system with lower transmitting power at the Base...

Focusing on the downlink, we consider a base station (BS) and the cell it covers. The Superposition Coding (SC), also referred to as Non Orthogonal Multiple Access (NOMA), is implemented. We propose an analytical model of the wireless cell covered by the BS. Based on this model, we establish a closed form expression of the minimum transmit power of the base station, needed to achieve a given SI...