TY - GEN
T1 - Group-wise distributed space-time-frequency coded OFDM over asymmetric frequency-selective AF relay channels
AU - Lee, Seokwon
AU - Han, Seungyoup
AU - Ju, Hyungsik
AU - Lee, Jemin
AU - Hong, Daesik
PY - 2011
Y1 - 2011
N2 - Distributed space-time-frequency coding (DSTFC) is a method to achieve diversity from both multipaths and user cooperations. The DSTFC has been researched by assuming that the multipath profiles of relays are the same (symmetric). However, the symmetric frequency- selective channel is limited in the wireless relay communications. Thus, in this paper, we propose a new DSTFC for relay-based amplify-and-forward (AF) cooperative scheme over the asymmetric frequency selective channels. The proposed scheme is based on the sub-carrier grouping in OFDM transmission. By analyzing pairwise error probability (PEP), diversity order of the proposed DSTFC is derived. In addition, a necessary condition of sub-carrier grouping to achieve the maximum diversity and minimize the decoding complexity is investigated. Simulation results verify that the proposed scheme can achieve the maximum diversity gain for a given asymmetric multipath profile.
AB - Distributed space-time-frequency coding (DSTFC) is a method to achieve diversity from both multipaths and user cooperations. The DSTFC has been researched by assuming that the multipath profiles of relays are the same (symmetric). However, the symmetric frequency- selective channel is limited in the wireless relay communications. Thus, in this paper, we propose a new DSTFC for relay-based amplify-and-forward (AF) cooperative scheme over the asymmetric frequency selective channels. The proposed scheme is based on the sub-carrier grouping in OFDM transmission. By analyzing pairwise error probability (PEP), diversity order of the proposed DSTFC is derived. In addition, a necessary condition of sub-carrier grouping to achieve the maximum diversity and minimize the decoding complexity is investigated. Simulation results verify that the proposed scheme can achieve the maximum diversity gain for a given asymmetric multipath profile.
UR - http://www.scopus.com/inward/record.url?scp=83755181615&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=83755181615&partnerID=8YFLogxK
U2 - 10.1109/VETECF.2011.6093105
DO - 10.1109/VETECF.2011.6093105
M3 - Conference contribution
AN - SCOPUS:83755181615
SN - 9781424483273
T3 - IEEE Vehicular Technology Conference
BT - 2011 IEEE Vehicular Technology Conference Fall, VTC Fall 2011 - Proceedings
T2 - IEEE 74th Vehicular Technology Conference, VTC Fall 2011
Y2 - 5 September 2011 through 8 September 2011
ER -