scholarly journals Joint TAS and Power Allocation for SDF Relaying M2M Cooperative Networks

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Lingwei Xu ◽  
Hao Zhang ◽  
Jingjing Wang
Keyword(s):  
Power Allocation ◽  
Fading Channels ◽  
Performance Optimization ◽  
Antenna Selection ◽  
Cooperative Networks ◽  
Transmit Antenna Selection ◽  
Decode And Forward ◽  
Simulation Results ◽  
Nakagami Fading Channels ◽  
Multiple Relay

The outage probability (OP) performance of multiple-relay-based selective decode-and-forward (SDF) relaying mobile-to-mobile (M2M) networks with transmit antenna selection (TAS) overN-Nakagami fading channels is investigated. The exact closed-form expressions for OP of the optimal and suboptimal TAS schemes are derived. The power allocation problem is formulated for performance optimization. Then, the OP performance under different conditions is evaluated through numerical simulations to verify the analysis. The simulation results showed that optimal TAS scheme has a better OP performance than suboptimal TAS scheme. Further, the power allocation parameter has an important influence on the OP performance.

scholarly journals Performance Analysis of SNR-Based HDAF M2M Cooperative Networks

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Lingwei Xu ◽  
Hao Zhang ◽  
T. Aaron Gulliver
Keyword(s):  
Numerical Simulation ◽  
Performance Analysis ◽  
Lower Bound ◽  
Outage Probability ◽  
Power Allocation ◽  
Fading Channels ◽  
Cooperative Networks ◽  
Nakagami Fading ◽  
Nakagami Fading Channels

The lower bound on outage probability (OP) of mobile-to-mobile (M2M) cooperative networks overN-Nakagami fading channels is derived for SNR-based hybrid decode-amplify-forward (HDAF) relaying. The OP performance under different conditions is evaluated through numerical simulation to verify the accuracy of the analysis. These results show that the fading coefficient, number of cascaded components, relative geometric gain, and power-allocation are important parameters that influence this performance.

scholarly journals AWGN and Rayleigh Fading Behavior of the Wireless Decode-and-Forward Relay Channel with Arbitrary Time and Power Allocation

2018 ◽  
Vol 10 (1) ◽  
pp. 248
Author(s):  
Muhammad Zarol Fitri Khairol Fauz ◽  
Elsheikh Mohamed Ahmed Elsheikh
Keyword(s):  
Mutual Information ◽  
Power Allocation ◽  
Fading Channels ◽  
Time Allocation ◽  
Rayleigh Fading ◽  
Cellular Systems ◽  
Base Stations ◽  
Relay Channel ◽  
Decode And Forward ◽  
Half Duplex

Relying has in use for decades to tackle some of the challenges of wireless communication such as extending transmitting distance, transmitting over rough terrains. Diversity achieved through relaying is also a means to combat the random behavior of fading channels. In this work, effect of time and power allocation on relay performance is studied. The channel considered is the three-node channel with half-duplex constraint on the relay. The relaying technique assumed is decode-and-forward. Mutual information is used as the criteria to measure channel performance. There is half-duplex constraint and a total transmission power constraint on the relay source node and the relay node. A model is established to analyze the mutual information as a function of time allocation and power allocation in the case of AWGN regime. The model is extended to the Rayleigh fading scenario. In both AWGN and Rayleigh fading, results showed that the importance of relaying is more apparent when more resources are allocated to the relay. It was also shown that quality of the source to destination link has direct impact on the decision to relay or not to relay. Relatively good source to destination channel makes relaying less useful. The opposite is true for the other two links, namely the source to relay channel and the relay to destination channel. When these two channels are good, relaying becomes advantageous. When applied to cellular systems, we concluded that relaying is more beneficial to battery-operated mobile nodes than to base stations.

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