Direct Antenna Modulation (DAM) for Enhanced Capacity Performance of Near-Field Communication (NFC) Link

被引：30

作者：

Azad, Umar ^{[1
]}

Wang, Yuanxun Ethan ^{[2
]}

机构：

[1] Univ Calif Los Angeles, Digital Microwave Lab, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, EE Dept, Los Angeles, CA 90095 USA

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2014年 / 61卷 / 03期

关键词：

Capacity performance; direct antenna modulation; inductive coupling; near-field communication system;

D O I：

10.1109/TCSI.2013.2283995

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Shannon's theorem suggests that the capacity of a wireless link is determined by both the power received and the bandwidth of the system. However, in a conventional setup of an inductively coupled near-field communication (NFC) link, there is a trade-off between the power coupled through and the bandwidth. Direct antenna modulation (DAM) is a feasible scheme to mitigate this dilemma. With DAM utilized in a NFC link, the power and bandwidth product limit in a high Q system can be circumvented because the non-linear/time-varying nature of the operation allows high speed modulations decoupled from the charging and discharging process of the high-Q resonator. In this paper, the theory of NFC link with DAM on the transmitter is presented and validated with an experimental setup. Improvement in reception of the high-speed modulation information is observed in the experiment, implying that a superior capacity performance of a NFC link is achieved through DAM versus the traditional scheme.

引用

页码：902 / 910

页数：9

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