Title :
Physical layer network coding schemes for two-way relay
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, London, UK
Abstract :
In this paper, various physical layer network coding (PNC) schemes are revisited for wireless two-way relay channel in single antenna case. The achievable rates are reviewed for AWGN channel and newly derived for fading channel for all these PNC schemes employing lattice codes and lattice decoding. A new transmit scheme using precoding is proposed over fading channel to achieve higher rates. It is revealed that for two-way relay channel, compute-and-forward can achieve the highest rate over both AWGN channel and fading channel. Thus it is the most suitable PNC scheme for two-way relay.
Keywords :
AWGN channels; codes; decoding; fading channels; network coding; precoding; relay networks (telecommunication); wireless channels; AWGN channel; PNC scheme; compute-and-forward channel; fading channel; lattice codes; lattice decoding; physical layer network coding schemes; precoding; single antenna case; wireless two-way relay channel; Channel capacity; Decoding; Fading; Lattices; Relays; Signal to noise ratio; Transmitters; Compute-and-forward; lattice codes; lattice decoding; physical layer network coding; two-way relay;
Conference_Titel :
Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2014 9th International Symposium on
Conference_Location :
Manchester
DOI :
10.1109/CSNDSP.2014.6923919
