Title :
Optimum Combining in Dual-Hop AF Relaying for Maximum Spectral Efficiency in the Presence of Co-Channel Interference
Author :
Suraweera, Navod ; Beaulieu, Norman C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada
Abstract :
The performance of optimum combining (OC) in amplify-and-forward (AF) relaying systems in the presence of co-channel interference (CCI) is analyzed using a tight approximation for the signal-to-interference-plus-noise ratio (SINR) at the destination. Two types of relaying protocols are studied, all-relay transmission with OC and best-relay transmission with OC. When CCI is present only at the destination, both relaying protocols achieve diversity gains up to M when interferer powers are scaled with the source and the relay powers, where M is the number of relays. Best-relay transmission with OC maximizes the spectral efficiency as each communication consumes only two time slots.
Keywords :
amplify and forward communication; approximation theory; cochannel interference; cooperative communication; diversity reception; probability; protocols; relay networks (telecommunication); CCI; SINR; amplify-and-forward relaying systems; best-relay transmission; cochannel interference; cooperative relaying; diversity gains; dual-hop AF relaying systems; maximum spectral efficiency; optimum combining; outage probability; relaying protocols; signal-to-interference-plus-noise ratio; time slots; Approximation methods; Diversity methods; Diversity reception; Interchannel interference; Relays; Signal to noise ratio; Amplify-and-forward; co-channel interference; diversity gain; diversity gain,; ergodic capacity; optimum combining; outage probability; relay selection;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2015.2424234
