Joint Power Allocation for OFDM-Based Non-Concurrent Two-Way AF Relaying

Babu, Pandava Sudharshan; Budhiraja, Rohit; Chaturvedi, Anoop

doi:10.1109/lcomm.2018.2858829

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Considering a DF relay-assisted system, the authors of [14] developed a simultaneous wireless information and power transfer scheme. In [15], an overhearing-based interference cancellation scheme and a power allocation algorithm were developed for a non-concurrent BDRS with the aim of maximizing the system sum rate. The authors of [16] proposed a resource management scheme controlling the transmit-power levels of the nodes and assigning the bit rates among different subcarriers so as to minimize the total transmit power of the system, while ensuring the target rates of the two sources.…”

Section: Related Workmentioning

confidence: 99%

Energy-efficient resource management for OFDM modulated bidirectional relaying with quality-of-service constraint

Qian

Huang

2021

J Wireless Com Network

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This paper addressed the energy-efficient resource management problem of an amplify-and-forward relay-assisted bidirectional relay system under a quality-of-service (QoS) constraint. The objective is to develop a holistic resource management algorithm for joint implementation of relay selection, power adaptation and bit-rate management for optimal energy efficiency (EE). A three-stage approach is proposed to solve the energy-efficient resource management problem. At stage 1 (stage of power management), a per-subcarrier energy-efficient problem is investigated, leading to a power adaptation algorithm for maximizing the system EE and ensuring the required level of the system QoS. Within the framework of the power adaptation algorithm and by exploiting spatial diversity of multiple-relay channels, distributed relay selection is investigated at stage 2 (stage of relay management). Next, the bit-rate management problem is tackled at stage 3, namely assigning bit rate to different subcarriers to maximize the system EE further. Finally, summarizing the results achieved at the three stages, a novel EE technology combined with relay selection, bit-rate management and power adaptation is developed. Simulation results validated the correctness and the efficiency of the proposed algorithm. It is shown that the proposed algorithm can significantly reduce the total transmit power of the system while ensuring the required system QoS.

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Section: Related Workmentioning

confidence: 99%

Energy-efficient resource management for OFDM modulated bidirectional relaying with quality-of-service constraint

Qian

Huang

2021

J Wireless Com Network

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“…Further, considering the orthogonality of the N subcarriers of the OFDM signal, the anti-noise performance of the OFDM signal can be equivalent to the sum of the anti-noise performance of the N MQAM signals [24], [25]. Without loss of generality, it is assumed that the number of subcarriers corresponding to the OFDM signal is N , each subchannel adopts MQAM modulation, and the bit error rate corresponding to each subchannel is M P [26], [27], and the bit error rate calculation process of the MQAM modulated signal is as follows:…”

Section: A Two-dimensional New Communication Technology Working Mechmentioning

confidence: 99%

Two-Dimensional New Communication Technology for Networked Ammunition

et al. 2020

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In order to improve the transmission data rate and the three-resistance characteristics of the network ammunition communication link, this paper proposes a new communication technology with two dimensions. In this technology, orthogonal frequency division multiplexing (OFDM) is used for onedimensional data transmission, and the G-function-driven subcarrier frequency change rule in differential frequency hopping (DFH) is used for two-dimensional data transmission, which breaks through the conventional idea of using carrier amplitude frequency phase modulation information, and establishes a new two-dimensional communication model based on DFH-OFDM. The theoretical analysis and simulation results show that the proposed two-dimensional new communication technology, without changing the original communication system and signal characteristics, effectively reduces the probability of signal interception, improves the communication system capacity, and has good three-resistance performance.

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Optimal Relay Deployment in Bidirectional AF Relaying Systems

2019

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Recently, the node deployment problem of a relay network has brought a hot discussion. This paper studies utility function minimum maximization problem of bidirectional amplify and forward relaying systems from the perspective of relay deployment. Since many optimization problems are considered separately, different algorithms are proposed for each optimization problem. So we consider a unified utility function instead of the separate optimization goals. Two different optimization problems are considered. One is to find the optimal relay deployment and optimize the utility function with fixed power allocation. The other is joint optimization of relay deployment and power allocation. Especially when power is fixed, the relay deployment is not a fixed location, but a piecewise function. In order to balance the two opposite transmission directions in bidirectional relaying networks, the relay deployment is related to channel gain and path loss. In addition, approximate and accurate expressions of average relay deployment are investigated when only statistical channel information is available. Simulation results validate that the reasonable relay deployment improves the system performance. INDEX TERMS Bidirectional relaying, relay deployment, power allocation.

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Joint Power Allocation for OFDM-Based Non-Concurrent Two-Way AF Relaying

Cited by 5 publications

References 12 publications

Energy-efficient resource management for OFDM modulated bidirectional relaying with quality-of-service constraint

Energy-efficient resource management for OFDM modulated bidirectional relaying with quality-of-service constraint

Two-Dimensional New Communication Technology for Networked Ammunition

Optimal Relay Deployment in Bidirectional AF Relaying Systems

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