Joint Power Control and Relay Selection with Short Packet Communications under Co-channel Interference

n this paper, a cooperative system where one multiple antenna transmitter communicates with one single antenna receiver with assistance of multiple relay nodes is considered. Under this system setting, with co-channel interference affecting on the relays, we evaluate the system in short packet communication (SPC). Relied on SPC metric, average block error rate (BLER) of the receiver corresponding to given relay is calculated. Next, due to multiple relay, we formulate a problem which joint power allocation and relay selection to minimize the BLER. To address the problem, we divide it into two sub-problems, which are power allocation and relay selection problems. The proposed solution’s effectiveness is validated through simulation and analysis results, which demonstrate its superior performance over benchmark methods.