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Zastosowanie detekcji z kompensacją interferencji w transmisji z przekaźnikiem w trybie kodowania sieciowego w warstwie fizycznej

Ghazi Hind Salim, Wesołowski Krzysztof

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2020

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nr 7-8

382--385, CD

PL

W artykule pokazano możliwość zastosowania układu kompensacji interferencji w układzie przekaźnika działającego w trybie transmisji z kodowaniem sieciowym w warstwie fizycznej, co skutkuje obniżeniem stopy błędów w wymianie bloków informacyjnych pomiędzy terminalami uczestniczącymi w tej wymianie w porównaniu z rozwiązaniem, w którym detekcja w układzie przekaźnika jest realizowana w sposób tradycyjny. Podniesienie jakości wymiany informacji pokazano na drodze symulacyjnej wykorzystując model transmisji zgodny ze standardem IEEE 802.11a.

EN

This paper presents application of interference cancellation in the detection performed in the two-way relaying when transmission is performed using Physical Layer Network Coding. We show that due to the applied detection method bit error rate for information blocks exchanged between terminals participating in two-way relaying are substantially decreased as compared with a traditional detection performed in the relay. Improvement in the error rate performance is shown using simulation based on a transmission system conforming to IEEE 802.11a standards.

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Two-Way Relaying Cooperative Wireless Networks : Resource Allocation and Performance Analysis

Abrar M., Gui X., Punchihewa A.

International Journal of Electronics and Telecommunications

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2013

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Vol. 59, No. 3

229-235

EN

Relay-based cooperative wireless networks have been widely considered one of the cost-effective solutions to meet the demands in future wireless networks. In order to maximize the overall sum-rate while maintaining proportional fairness among users, we investigate different resource allocation algorithms in two-way relay networks with analog network coding (ANC) protocol and time division broadcast (TDBC) protocol. The algorithms investigated are different from traditional proportional fairness schemes in terms of fairness and computational complexity as we have applied Access Proportional Fairness (APF) and Minimum Rate Proportional Fairness (MRPF) along with load balancing at the relays. A MATLAB simulation has been performed and simulation results show the effectiveness of these algorithms.

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Outage Analysis and Power Allocation for Space-time Block Coded Two-way Relaying

Yıldız M., Aygölü Ü.

Advances in Electronics and Telecommunications

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2013

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Vol. 3, no. 5

25--31

EN

In this paper, we consider the two-way relay channel (TWRC) over which communication is performed using spacetime block codes (STBC) with physical-layer network coding (PNC) protocol. The three-node two-way relaying (TWR) model consists of two end nodes (sources) simultaneously communicating with each other over a relay node where each node is equipped with two antennas and uses Alamouti’s STBC to provide diversity. We consider non-reciprocal channels where fading channel coefficients are independent for opposite directions of the same link. We first derive closed form expressions for the outage probability of the STBC-TWR system and uncoded TWRC assuming equal transmit power at each node and decode-and-forward (DF) strategy at the relay. We show that the STBC-TWR system significantly improves the uncoded TWRC outage performance. Then, to further improve the performance, we propose an optimal ower allocation in TWR scheme employing Alamouti’s STBC and PNC protocol. The optimal power allocation is obtained by maximizing the sum-rate under the total power constraint. We show that the optimal power allocation considerably improves the outage performance as well as the sum-rate compared to the equal-power case.