Perfect Secrecy in Physical-Layer Network Coding Systems From Structured Interference

Strong Secrecy in Wireless Network Coding Systems from Structured Interference

Wireless network coding (WNC) has been proposed for next generation networks. In this contribution, we investigate WNC schemes with embedded strong secrecy by exploiting structured interference in relay networks with two users and a single relay. In a practical scenario where both users employ finite, uniform signal input distributions we compute the corresponding strong secrecy capacity, and m...

Physical Layer Network Coding

A main distinguishing feature of a wireless network compared with a wired network is its broadcast nature, in which the signal transmitted by a node may reach several other nodes, and a node may receive signals from several other nodes simultaneously. Rather than a blessing, this feature is treated more as an interference-inducing nuisance in most wireless networks today (e.g., IEEE 802.11). Th...

Successive Decoding with Hierarchical Interference Cancellation in Wireless (Physical Layer) Network Coding Systems

The intermediate network nodes (relays) in Wireless (Physical Layer) Network Coding (WNC) systems are allowed to process only some specific (“hierarchical") functions of user data (instead of separate decoding of individual user signals), which allows to overcome the rate limits induced by the conventional Multiple Access Channels capacity regions. Unfortunately, since the mapping between a spe...

Orthogonal Physical Layer Network Coding

Physical-layer network coding in coherent optical OFDM systems.

We present the first experimental demonstration and characterization of the application of optical physical-layer network coding in coherent optical OFDM systems. It combines two optical OFDM frames to share the same link so as to enhance system throughput, while individual OFDM frames can be recovered with digital signal processing at the destined node.