TY - JOUR
T1 - OFDM with Index Modulation Assisted by Multiple Amplify-and-Forward Relays
AU - Sheng, Guo
AU - Dang, Shuping
AU - Zhang, Zhenrong
AU - Kocan, Enis
AU - Pejanovic-Djurisic, Milica
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2019/1/15
Y1 - 2019/1/15
N2 - A multi-relay assisted orthogonal frequency division multiplexing (OFDM) system with index modulation (OFDM-IM) is proposed in this letter, assuming that amplify-and-forward (AF) relaying protocol is adopted at relays. Two commonly used AF protocols are considered: fixed-gain (FG) AF and variable-gain (VG) AF relaying protocols. To utilize relays in an efficient manner, we also employ two multi-carrier relay selection schemes termed bulk and per-subcarrier (PS) relay selection in the proposed system. We analyze the outage performance of the proposed system and derive closed-form expressions of the average outage probabilities (AOPs) for all cases with different AF relaying protocols and multi-carrier relay selection schemes. In addition, we obtain the asymptotic expressions of AOPs in the high signal-to-noise ratio (SNR) region, by which it is proven that the full diversity gain equaling the number of relays is attainable.
AB - A multi-relay assisted orthogonal frequency division multiplexing (OFDM) system with index modulation (OFDM-IM) is proposed in this letter, assuming that amplify-and-forward (AF) relaying protocol is adopted at relays. Two commonly used AF protocols are considered: fixed-gain (FG) AF and variable-gain (VG) AF relaying protocols. To utilize relays in an efficient manner, we also employ two multi-carrier relay selection schemes termed bulk and per-subcarrier (PS) relay selection in the proposed system. We analyze the outage performance of the proposed system and derive closed-form expressions of the average outage probabilities (AOPs) for all cases with different AF relaying protocols and multi-carrier relay selection schemes. In addition, we obtain the asymptotic expressions of AOPs in the high signal-to-noise ratio (SNR) region, by which it is proven that the full diversity gain equaling the number of relays is attainable.
UR - http://hdl.handle.net/10754/630870
UR - https://ieeexplore.ieee.org/document/8612925
UR - http://www.scopus.com/inward/record.url?scp=85067937742&partnerID=8YFLogxK
U2 - 10.1109/LWC.2019.2893258
DO - 10.1109/LWC.2019.2893258
M3 - Article
SN - 2162-2337
VL - 8
SP - 789
EP - 792
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 3
ER -