Outage Performance Analysis of Incremental Relay Selection for STBC AF Cooperative Networks
In this paper, selection and incremental schemes are investigated for multi-input multi-output (MIMO) cooperative systems in which multiple amplify-and-forward relays and spacetime block coding (STBC) are applied. In order to make an efficient use of the degrees of freedom of channel and provide full diversity order in the multi-relay STBC network, the selection and incremental protocols are employed by exploiting limited feedback from destination. Maximum ratio combination technique is applied at the destination. Outage probabilities of the both cooperative schemes are analytically derived at high signal to noise ratio regime. It is shown the incremental selection STBC scheme leads to a higher performance compared to the STBC selection relaying scheme and conventional STBC MIMO channels; so that the outage capacity provided by the incremental selection scheme is twice of the selection scheme at the low outage probabilities.
incremental relaying relay selection spacetime block coding (stbc) outage probability cooperative communication amplify-and-forward (af)