期刊
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
卷 13, 期 12, 页码 7072-7085出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2014.2331055
关键词
Wireless; directional antennas; beamforming; orientation error; stochastic geometry; transmission capacity; spatial throughput
资金
- National Science Foundation [CNS-1147838]
- Academy of Finland
- Division Of Computer and Network Systems
- Direct For Computer & Info Scie & Enginr [1147838] Funding Source: National Science Foundation
We introduce a model for capturing the effects of beam misdirection on coverage and throughput in a directional wireless network using stochastic geometry. In networks employing ideal sector antennas without sidelobes, we find that concavity of the orientation error distribution is sufficient to prove monotonicity and quasi-concavity (both with respect to antenna beamwidth) of spatial throughput and transmission capacity, respectively. Additionally, we identify network conditions that produce opposite extremal choices in beamwidth (absolutely directed versus omni-directional) that maximize the two related throughput metrics. We conclude our paper with a numerical exploration of the relationship between mean orientation error, throughput-maximizing beamwidths, and maximum throughput, across radiation patterns of varied complexity.
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