Comparative Analysis on Channel Allocation Schemes in Multiple Subcarrier Passive Communication System

Nitish RAJORIA  Yuki IGARASHI  Jin MITSUGI  Yusuke KAWAKITA  Haruhisa ICHIKAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E98-B    No.9    pp.1777-1784
Publication Date: 2015/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.1777
Type of Manuscript: Special Section PAPER (Special Section on Emerging Technologies on Ambient Sensor Networks toward Future Generation)
Category: 
Keyword: 
passive communications,  wireless sensing,  multiple access,  subcarrier allocation,  

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Summary: 
Multiple subcarrier passive communication is a new research area which enables a type of frequency division multiple access with wireless and batteryless sensor RF tags just by implementing RF switches to produce dedicated subcarriers. Since the mutual interference among subcarriers is unevenly distributed over the frequency band, careless allocations of subcarrier frequencies may result in degraded network performance and inefficient use of the frequency resource. In this paper, we examine four subcarrier frequency allocation schemes using MATLAB numerical simulations. The four schemes are evaluated in terms of the communication capacity and access fairness among sensor RF tags. We found that the subcarrier allocation scheme plays an important role in multiple subcarrier communication and can improves the communication capacity by 35%.