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We consider the information exchange between two source nodes with the help of a relay node in a two-way relay network (TWRN). Based on physical-layer network coding (PNC), at the relay node, Viterbi or BCJR algorithms based on a full-state trellis can be used for decoding. Since the relay node only needs to decode XORed message rather than two individual(More)
—We consider a bidirectional relay system using a physical-layer network coding (PNC) protocol with Alamouti's space-time block coding (STBC) at the two source nodes while there is only one antenna at the relay node. Upper and lower bounds on symbol error probability (SEP) are derived for Binary Phase Shift Keying (BPSK) modulation scheme. It is shown that(More)
—We study the energy efficiency for a wireless sensor network, in which multiple sensors having identical information cooperatively transmit signals to a fusion center. To facilitate the cooperation, we propose a transmission scheme consisting of four phases: channel state information acquisition phase, sensor selection phase, beamforming phase, and(More)