TY - JOUR
T1 - Blockwise amplify-and-forward relaying strategies for multipoint-to- multipoint MIMO networks
AU - Kim, Jaesin
AU - Hwang, Jeongho
AU - Lee, Kyoung Jae
AU - Lee, Inkyu
N1 - Funding Information:
This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No.2010-0017909), and in part by Seoul R&BD program (ST 090852). A part of this work was presented at the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Tokyo, Japan, September 2009.
PY - 2011/7
Y1 - 2011/7
N2 - In this letter, we consider a multipoint-to-multipoint transmission system which employs a single relay in wireless networks where all source, destination and relay nodes are equipped with multiple antennas. For amplify-and-forward relay systems, we propose new linear processing strategies for maximizing the sum rate performance by applying a blockwise relaying method combined with convex optimization techniques. To reduce a computational complexity, we first consider a zero-forcing based relay only optimization scheme, which generate a closed-form solution in a non-iterative fashion. In order to further improve the sum rate at low signal-to-noise ratio regimes, we additionally design an enhanced relay filter by exploiting the blockwise relaying method based on a minimum mean-square error criterion. Simulation results show that the proposed relay design strategies outperform the existing conventional schemes in terms of the sum rate.
AB - In this letter, we consider a multipoint-to-multipoint transmission system which employs a single relay in wireless networks where all source, destination and relay nodes are equipped with multiple antennas. For amplify-and-forward relay systems, we propose new linear processing strategies for maximizing the sum rate performance by applying a blockwise relaying method combined with convex optimization techniques. To reduce a computational complexity, we first consider a zero-forcing based relay only optimization scheme, which generate a closed-form solution in a non-iterative fashion. In order to further improve the sum rate at low signal-to-noise ratio regimes, we additionally design an enhanced relay filter by exploiting the blockwise relaying method based on a minimum mean-square error criterion. Simulation results show that the proposed relay design strategies outperform the existing conventional schemes in terms of the sum rate.
KW - Multiple-input multiple-output (MIMO)
KW - amplify-and-forward (AF) relay
KW - blockwise relaying
KW - sum rate maximization
UR - http://www.scopus.com/inward/record.url?scp=79960563207&partnerID=8YFLogxK
U2 - 10.1109/TWC.2011.052311.101493
DO - 10.1109/TWC.2011.052311.101493
M3 - Article
AN - SCOPUS:79960563207
SN - 1536-1276
VL - 10
SP - 2028
EP - 2033
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 7
M1 - 5783010
ER -