Asymptotic Analysis on Spatial Diversity versus Multiuser Diversity in Wireless Networks

2006 ◽  
Author(s):  
Quan Zhou ◽  
Huaiyu Dai
Keyword(s):  
Wireless Networks ◽  
Asymptotic Analysis ◽  
Spatial Diversity ◽  
Multiuser Diversity

scholarly journals Asymptotic analysis of flooding in CSMA-based large scale ad-hoc wireless networks

2012 ◽  
Vol 2012 (1) ◽  
Author(s):  
Hamed Shah-Mansouri ◽  
Babak Hossein Khalaj ◽  
Seyed Pooya Shariatpanahi ◽  
Javier Del Ser ◽  
Susana Pérez-Sánchez
Keyword(s):  
Wireless Networks ◽  
Asymptotic Analysis ◽  
Large Scale ◽  
Ad Hoc ◽  
Ad Hoc Wireless Networks

Asymptotic Analysis of Inhomogeneous Information-Centric Wireless Networks With Infrastructure Support

2018 ◽  
Vol 67 (6) ◽  
pp. 5245-5259 ◽  
Author(s):  
Kechen Zheng ◽  
Ying Cui ◽  
Xiaoying Liu ◽  
Xinbing Wang ◽  
Xiaohong Jiang ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Asymptotic Analysis

Studies on the Short Term Fairness Properties of Joint Scheduler

2012 ◽  
Vol 4 (3) ◽  
pp. 23-39
Author(s):  
Fumio Ishizaki
Keyword(s):  
Wireless Networks ◽  
Round Robin ◽  
Multiuser Diversity ◽  
Short Term ◽  
Information Theoretic ◽  
Good Balance ◽  
Fair Scheduling ◽  
Fair Scheduler ◽  
Statistical Time ◽  
The One

Since the utilization of multiuser diversity in wireless networks can increase the information theoretic capacity, much attention has been paid to packet schedulers exploiting multiuser diversity. However, it is known if there exists a tradeoff between the information theoretic capacity and fairness achieved by schedulers exploiting multiuser diversity. Therefore, the authors consider the fairness of the schedulers exploiting multiuser diversity as well as their information theoretic capacity. Among schedulers exploiting multiuser diversity, the one-bit feedback fair scheduler is considered an attractive choice due to its good balance between the capacity and fairness. This paper considers a joint scheduler which incorporates the weighted round-robin scheduling into the one-bit feedback fair scheduling. It is expected that by incorporating the round-robin scheduling into the one-bit feedback fair scheduling, the short term fairness of the scheduler is greatly improved. Considering the statistical time-access fairness index (STAFI) as a measure of short term fairness, the authors study the short term fairness properties provided by the joint scheduler. The effects of the threshold of the scheduler on the STAFI are investigated. The threshold of the scheduler strongly affects its short term fairness properties.

scholarly journals Reduced-Complexity Radio Architectures for Enhanced Receive Selection Combining in Multiuser Diversity Systems

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Elpiniki P. Tsakalaki ◽  
Osama N. Alrabadi ◽  
Constantinos B. Papadias ◽  
Ramjee Prasad
Keyword(s):  
Antenna Selection ◽  
Low Cost ◽  
Spatial Diversity ◽  
Antenna System ◽  
Multiuser Diversity ◽  
Selection Combining ◽  
User Terminal ◽  
Receive Diversity ◽  
Diversity Systems ◽  
System Properties

Although antenna selection is a simple and efficient technique for enhancing the downlink performance of multiuser diversity systems, the large antenna interelement spacing required for achieving spatial diversity is prohibitive for user terminals due to size restrictions. In order to allay this problem, we propose miniaturized switched beam receiver designs assisted by low-cost passive reflectors. Unlike conventional spatial receive diversity systems, the proposed angular diversity architectures occupy a small volume whereas the antenna system properties are optimized by controlling the strong reactive fields present at small dimensions. The systems are designed for maximum antenna efficiency and low interbeam correlation, thus yieldingNpractically uncorrelated receive diversity branches. The simulation results show that the proposed enhanced diversity combining systems improve the average throughput of a multiuser network outperforming classical antenna selection especially for small user populations and compact user terminal size.

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