Fading Two-Way Relay Channels: Physical-Layer Versus Digital Network Coding

Ser-minimization Relay Selection for Two-way Relay Channels with Physical Layer Network Coding

This paper explores the relay selection scheme for two-way relay channels with physical layer network coding (PNC), where two end nodes exchange information via a selected relay node with the minimal symbol error rate (SER) performance among multiple candidate relay nodes. To reduce the computational complexity, we also propose a suboptimal minimal SER-based relay selection. The end-to-end SER ...

Rotationally Invariant Coded Modulation for Physical Layer Network Coding in Two-way Relay Fading Channel

This paper investigates a novel coded modulation scheme for Physical Layer Network Coding (PLNC) in the Two-Way Relay (TWR) fading channel. Using a fully-adaptive adaptive soft demodulator and Independent Decoding Levels, the proposed scheme can eliminate the effect of fading on the TWR Channel. To reduce system complexity at the relay, we also provide a low-complexity scheme with a series of f...

A novel design of physical layer network coding in strong asymmetric two-way relay channels

The quality of two-way links is always asymmetric in practical two-way relay channels (TWRC) and therefore, the capacity of TWRC will be limited by the weaker link. An asymmetric modulation scheme, with physical layer network coding, was presented in order to improve the transmission reliability in TWRC. This makes full use of the stronger link to improve the overall transmission rate and also ...

Eigen-Direction Alignment Based Physical-Layer Network Coding for MIMO Two-Way Relay Channels

In this paper, we propose a novel communication strategy which incorporates physical-layer network coding (PNC) into multiple-input multiple output (MIMO) two-way relay channels (TWRCs). At the heart of the proposed scheme lies a new key technique referred to as eigen-direction alignment (EDA) precoding. The EDA precoding efficiently aligns the two-user’s eigen-modes into the same directions. B...

A Practical Physical-Layer Network Coding for Fading Channels