TY - GEN
T1 - Interference alignment for degrees of freedom improvement in 3-relay half-duplex systems
AU - Park, Seong Ho
AU - Ko, Young Chai
AU - Park, Ki Hong
AU - Alouini, Mohamed Slim
PY - 2011
Y1 - 2011
N2 - In a half-duplex relaying, the capacity pre-log factor is a major drawback in spectral efficiency. This paper proposes a linear precoding scheme and an alternate relaying protocol in a dual-hop half-duplex system where three relays help the communication between the source and the destination. In our proposed scheme, we consider a phase incoherent method in relays in which the source alternately transmits message signals to the different relays. In addition, we propose a linear interference alignment scheme which can eliminate the inter-relay interference resulted from the phase incoherence of relaying. Based on our analysis of degrees of freedom and our simulation results, we show that our proposed scheme achieves additional degrees of freedom compared to the conventional half-duplex relaying.
AB - In a half-duplex relaying, the capacity pre-log factor is a major drawback in spectral efficiency. This paper proposes a linear precoding scheme and an alternate relaying protocol in a dual-hop half-duplex system where three relays help the communication between the source and the destination. In our proposed scheme, we consider a phase incoherent method in relays in which the source alternately transmits message signals to the different relays. In addition, we propose a linear interference alignment scheme which can eliminate the inter-relay interference resulted from the phase incoherence of relaying. Based on our analysis of degrees of freedom and our simulation results, we show that our proposed scheme achieves additional degrees of freedom compared to the conventional half-duplex relaying.
UR - http://www.scopus.com/inward/record.url?scp=84860607141&partnerID=8YFLogxK
U2 - 10.1109/ICICS.2011.6173521
DO - 10.1109/ICICS.2011.6173521
M3 - Conference contribution
AN - SCOPUS:84860607141
SN - 9781457700309
T3 - ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing
BT - ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing
T2 - 8th International Conference on Information, Communications and Signal Processing, ICICS 2011
Y2 - 13 December 2011 through 16 December 2011
ER -