Joint beamforming, scheduling, and power allocation for hierarchical cellular systems

2012 ◽  
Author(s):  
Yu-Lung Liu ◽  
Meng-Lin Ku ◽  
Li-Chun Wang
Keyword(s):  
Power Allocation ◽  
Cellular Systems

Power allocation in the context of dimensioning the air-interface of third generation W-CDMA-based cellular systems

2002 ◽  
Vol 15 (5) ◽  
pp. 375-400 ◽  
Author(s):  
P. Demestichas ◽  
G. Kotsakis ◽  
E. Tzifa ◽  
V. Demesticha ◽  
M. Anagnostou ◽  
...  
Keyword(s):  
Power Allocation ◽  
Cellular Systems ◽  
Third Generation ◽  
Air Interface

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.

An OFDMA-Based Subcarrier and Power Allocation Scheme in Wireless Cooperative Cellular Systems

2008 ◽  
Vol 48 (2) ◽  
pp. 277-289 ◽  
Author(s):  
Zhihua Tang ◽  
Youtuan Zhu ◽  
Guo Wei ◽  
Jinkang Zhu
Keyword(s):  
Power Allocation ◽  
Cellular Systems ◽  
Allocation Scheme
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