BER-Based Comparison between AF and DF in Three-Terminal Relay Cooperative Communication with BPSK Modulation

Liu, Xianru; Du, Wenhao

doi:10.1109/msn.2016.054

Cited by 14 publications

(3 citation statements)

References 18 publications

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“…The authors of [7] presented a comparison between performance of the AF and DF in terms of the BER when BPSK modulation is used over Rayleigh fading channel. Cho et al [8] studied the effects of relay location on SER for AF and DF relays employing multiple relays.…”

Section: One Of the Most Important Technique Is Multi Input Multi Outmentioning

confidence: 99%

Influence of Relays Location and Propagation Environment on the BER of Multiple Relay Systems

AL-Khafaji¹,

AlSabbagh²,

Al-Omary³

et al. 2018

KEG

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Section: One Of the Most Important Technique Is Multi Input Multi Outmentioning

confidence: 99%

Influence of Relays Location and Propagation Environment on the BER of Multiple Relay Systems

AL-Khafaji¹,

AlSabbagh²,

Al-Omary³

et al. 2018

KEG

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“…Specifically, [4] has deduced and analyzed the outage probability of traditional static multi-point AF relay system with a single antenna, [5] compares the outage performance of AF and DF systems. [6] studies average BER performance and resource allocation strategies in DF stationary relay system with limited power, while [7] focuses on the comparision of BER performance of the two stationary systems. In addition, [8] - [10] propose different power allocation strategies in stationary relay systems with a single atenna.…”

Section: Introduction a Motivation And Related Workmentioning

confidence: 99%

UAV-Assisted Relaying Transmission Design and Optimization for High-Speed Moving Sources

2020

IEEE Access

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In state of the art relay-assisted transmission schemes, analysis of symbol error ratio (SER) and throughput mainly focuses on static or low-speed sources, where relay strategies and power allocation strategies are studied. However, when the sources move quickly with variable trajectories, the power allocation strategy of relays is affected by the sources' movement and time-varying channels, and should be adjusted dynamically according to the sources' trajectories with corresponding motion scenarios. Therefore, previous schemes are no longer applicable to solve the problem brought by high-speed sources because their channels and power allocation strategies are lack of correlation with the sources' movement. In this paper, taking full advantage of the flexibility of unmanned aerial vehicle (UAV) combined with multi-antenna technology, we propose two UAV-assisted relaying transmission schemes to serve high-speed moving sources. Through derivation and optimization of system's symbol error ratio (SER), new dynamic power allocation and adjustment strategies of the source and each UAV are obtained when the total power of the system is limited. Moreover, the proposed schemes utilize time-based power allocation lists to save signaling overhead. Simulation results demonstrate that our schemes outperform the compared schemes. INDEX TERMS moving sources, UAV relays, dynamic power allocation.

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“…Cooperative communication has recently received much attention as a method to improve network performance [1][2][3][4][5][6][7][8][9][10][11]. In multi-hop cooperative communications, the source transmits signal to relays that forward signals to the destination or other relays.…”

Section: Introductionmentioning

confidence: 99%

Optimal Power Allocation with Hybrid Relaying Based on the Channel Condition

2018

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This paper considers a hybrid relay network consisting of the source, the amplify-and-forward (AF) relay, the decode-and-forward (DF) relay, and the destination. In hybrid three-hop relay systems, the transmitted signal from source can be received at the destination after processing the signals through two relays. If the first relay amplifies and forwards the received signal, and the second relay decodes and forwards the received signal, the system model is considered to be an AF-DF relay system. The reverse case is considered for the DF-AF relay system. The AF-DF and DF-AF relay systems have different error rates and achievable throughput with respect to the channel conditions between two nodes. We propose optimal power allocation schemes for two different relays in order to maximize the achievable rate under a sum relay power constraint for given channel gains and transmit power from the source. By solving the optimization problem to maximize the achievable rate for each relay network, the transmit power values in closed form are derived. When the channel gains are the same, the optimal power allocation scheme for the AF-DF relay network proves that greater power should be allocated at the first relay to maximize the achievable rate. In the case of the DF-AF relay network, we derive an optimal power allocation scheme for the four possible cases. Under the same signal-to-noise ratio (SNR) condition, at the first hop we show that the achievable rate of the AF-DF relay network is greater than that of the DF-AF relay network when the channel gain between two relays is greater than that between the second relay and destination. Simulation results show that the proposed power allocation schemes provide a higher achievable rate than the equal power allocation scheme and the grid search schemes.

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BER-Based Comparison between AF and DF in Three-Terminal Relay Cooperative Communication with BPSK Modulation

Cited by 14 publications

References 18 publications

Influence of Relays Location and Propagation Environment on the BER of Multiple Relay Systems

Influence of Relays Location and Propagation Environment on the BER of Multiple Relay Systems

UAV-Assisted Relaying Transmission Design and Optimization for High-Speed Moving Sources

Optimal Power Allocation with Hybrid Relaying Based on the Channel Condition

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