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In this paper, we analyze the energy efficiency (EE) and outage performance in buffer-aided orthogonal frequency division multiplexing (OFDM) relay systems. All the relays adopt the amplify-and-forward (AF) protocol and the transmission from the source to destination on orthogonal subcarriers. We propose the max-sum relay selection scheme, which fully exploits the flexibility offered by both OFDM...
In this paper, we consider the buffer-aided multi-relay MIMO-OFDM networks and propose a joint space-time-frequency subchannel pairing scheme, in which subchannels of the source to relay links and relay to the destination links are paired in time, frequency, and space domain (TPFPSP) simultaneously. TPFPSP scheme can increase the equivalent channel gains between source and destination. We derive new...
This paper investigates energy efficient resource allocation for orthogonal frequency division multiplexing (OFDM) multi-relay networks, where the source node communicates with the destination node via multiple relay nodes. Both transmit power and circuit power consumption are taken into consideration. The objective is to minimize the overall power consumption so as to achieve high energy efficiency...
An Interference Channel with Generalized Feedback (IFC-GF) models a wireless network where the sources can sense the channel activity. The signal overheard from the channel provides information about the activity of the other sources and thus furnishes the basis for cooperation. This two-part paper studies achievable strategies (Part I) and outer bounds (Part II) for the general discrete memoryless...
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