Performance Analysis of Physical Layer Network Coded Bidirectional Relay Networks using Space Shift Keying Modulation for Los Communication at Millimetre Wave Frequencies

Space-shift keying (SSK) modulation is a novel multiple-input–multiple-output (MIMO) technique, which activates only a single antenna for transmission at any time instant and uses the index of this active antenna to implicitly convey information. In this paper, SSK modulation for physical layer network coding (PLNC) based two-way or bi-directional decode and forward relay network is proposed. It is assumed that a bidirectional relay network consists of two sources and a relay and operates in a half duplex mode. Specifically, the transceiver sends the data by employing SSK modulation and detects the signal based on the maximum likelihood (ML) detection criterion both at sources and relay. The error performance of the physical layer network coding (PLNC) protocol in bidirectional relay networks for SSK is analyzed in line-of-sight space shift keying (LOS-SSK) conditions. By considering LoS environment, the pair-wise error probability (PEP) is derived at the relay in closed form. The tight upper and lower bounds in closed form for the end-to-end average pairwise error probability (PER) are also obtained.