• Mrs.V.Jeyalakshmi
• Dr.S.Tamil Selvi
• S.Guruswathi
• P.Priyanga
• S.Kausalya

Physical Layer Network Coding is a new relaying Technique in which the superposition of Electro Magnetic Waves in air is exploited rather than considering it as nuisance. Our two way relay network model contains two source nodes with two transmitting antennas and one receive antenna. The centre relay node is employed with two receive antennas and one transmitting antenna. Source nodes S1 and S2 transmit information to the relay node R which employs Decode and Forward relaying. The relay node employs network coding on the received signal and retransmits the coded data to the source nodes. We have analyzed the Bit Error Rate performance at the relay node and end-to-end. Since the nodes are employed with two antennas, multiple copies of data is received at relay node which improves the reliability of the system. The system employs well known Alamouti space time block coding which improves the overall error performance.

Relay networks, Physical-layer network coding, Space-time block coding.

"SPACE TIME BLOCK CODES IN TWO RELAY NETWORK WITH PHYSICAL LAYER NETWORK CODING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.192-198, May-2019, Available :http://www.jetir.org/papers/JETIR1905I30.pdf

"SPACE TIME BLOCK CODES IN TWO RELAY NETWORK WITH PHYSICAL LAYER NETWORK CODING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp192-198, May-2019, Available at : http://www.jetir.org/papers/JETIR1905I30.pdf