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Abstract
This paper analyzes the outage probability (OP) and the average symbol error rate (SER) of decode-and-forward (DF) relaying. The paper derives closed-form expressions for the OP and the average SER with optimum combining (OC) considering fast-fading multiple correlated CCIs, the correlated source-relay, and thermal noise. It is shown that the performance of the large distance between the source and the relay is better than that of the small distance, regardless of interference fading speed at the destination. We also show that given the source-relay distance, the performance of slow-fading interference is basically better than that of fast fading, except in the low signal-to-noise-ratio (SNR) regime for the distance being small. In result, the source-relay distance is generally a more dominating factor for the performance than fading CCIs.
Highlights
IntroductionThere have been many research advances in the DF relay network: the opportunistic relaying (OR) in the presence of co-channel interferers (CCIs) is investigated in [10]; a new transmission scheme for selective DF relaying networks is presented, considering the employment of different modulation levels at the transmitting nodes [11]; and a joint scheme (JS) has been proposed for a multiple-relay multiple-input multiple-output (MIMO) network with a DF relaying strategy [12]
Cooperative communications have been prominent because of diversity gain [1]
EtI1D, b0, and bi are the power transmitted by the source over the time slot t1, the power transmitted by each interferer over the time slot t1, the source data symbol with unit average power, and each interferer data symbol with unit average power for i 1⁄4 1; ⋯; NID, respectively, and N ID is the number of interferers
Summary
There have been many research advances in the DF relay network: the opportunistic relaying (OR) in the presence of CCIs is investigated in [10]; a new transmission scheme for selective DF relaying networks is presented, considering the employment of different modulation levels at the transmitting nodes [11]; and a joint scheme (JS) has been proposed for a multiple-relay multiple-input multiple-output (MIMO) network with a DF relaying strategy [12]. We assume that multiple correlated CCIs are fast faded, the source and relay are correlated, and thermal noise is present. We derive closed-form expressions for the OP and the average SER with OC considering fast-fading multiple correlated CCIs, the correlated source-relay, and thermal noise. We investigate the effects of the source-relay distance and fast/ slow-fading CCIs on the performance. For the first time slot t1, i.e., in phase 1, the source transmits its data symbols
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