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Design of Non-orthogonal Multiple Access Enhanced Backscatter Communication. (arXiv:1711.11193v1 [cs.IT])
来源于:arXiv
Backscatter communication (BackCom), which allows a backscatter node (BN) to
communicate with the reader by modulating and reflecting the incident
continuous wave from the reader, is considered as a promising solution to power
the future Internet-of-Things. In this paper, we consider a single BackCom
system, where multiple BNs are served by a reader. We propose to use the
power-domain non-orthogonal multiple access (NOMA), i.e., multiplexing the BNs
in different regions or with different backscattered power levels, to enhance
the spectrum efficiency of the BackCom system. To better exploit power-domain
NOMA, we propose to set the reflection coefficients for multiplexed BNs to be
different. Based on this considered model, we develop the reflection
coefficient selection criteria. To illustrate the enhanced system with the
proposed criteria, we analyze the performance of BackCom system in terms of the
average number of bits that can be successfully decoded by the reader for
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