Sphere-packings, lattices, and groups
Sphere-packings, lattices, and groups
Elements of information theory
Elements of information theory
XORs in the air: practical wireless network coding
Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
Hot topic: physical-layer network coding
Proceedings of the 12th annual international conference on Mobile computing and networking
Embracing wireless interference: analog network coding
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Denoising strategy for convolutionally-coded bidirectional relaying
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
IEEE Transactions on Information Theory
Computation Over Multiple-Access Channels
IEEE Transactions on Information Theory
Broadcast Capacity Region of Two-Phase Bidirectional Relaying
IEEE Transactions on Information Theory
Performance Bounds for Bidirectional Coded Cooperation Protocols
IEEE Transactions on Information Theory
Spectral efficient protocols for half-duplex fading relay channels
IEEE Journal on Selected Areas in Communications
Adaptive modulation and network coding with optimized precoding in two-way relaying
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Denoising strategy for convolutionally-coded bidirectional relaying
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Modified high-order PAMs for binary coded physical-layer network coding
IEEE Communications Letters
Convolutional codes in two-way relay networks with physical-layer network codling
IEEE Transactions on Wireless Communications
A linear analog network coding for asynchronous two-way relay networks
IEEE Transactions on Wireless Communications
Beamforming-based physical layer network coding for non-regenerative multi-way relaying
EURASIP Journal on Wireless Communications and Networking - Special issue on physical-layer network coding for wireless cooperative networks
EURASIP Journal on Wireless Communications and Networking - Special issue on physical-layer network coding for wireless cooperative networks
A novel decoding-and-forward scheme with joint modulation for two-way relay channel
IEEE Communications Letters
Cooperative wireless networks based on physical layer network coding
IEEE Wireless Communications
Buffer-aware network coding for wireless networks
IEEE/ACM Transactions on Networking (TON)
Synchronization Analysis for Wireless TWRC Operated with Physical-layer Network Coding
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Hi-index | 0.01 |
We investigate modulation schemes optimized for two-way wireless relaying systems, for which network coding is employed at the physical layer. We consider network coding based on denoise-and-forward (DNF) protocol, which consists of two stages: multiple access (MA) stage, where two terminals transmit simultaneously towards a relay, and broadcast (BC) stage, where the relay transmits towards the both terminals. We introduce a design principle of modulation and network coding, considering the superposed constellations during the MA stage. For the case of QPSK modulations at the MA stage, we show that QPSK constellations with an exclusive-or (XOR) network coding do not always offer the best transmission for the BC stage, and that there are several channel conditions in which unconventional 5-ary constellations lead to a better throughput performance. Through the use of sphere packing, we optimize the constellation for such an irregular network coding. We further discuss the design issue of the modulation in the case when the relay exploits diversity receptions such as multiple-antenna diversity and path diversity in frequency-selective fading. In addition, we apply our design strategy to a relaying system using higher-level modulations of 16QAM in the MA stage. Performance evaluations confirm that the proposed scheme can significantly improve end-to-end throughput for two-way relaying systems.