A Widely Linear MMSE Anti-Collision Method for Multi-Antenna RFID Readers

被引：18

作者：

Deng, Wei ^{[1
]}

Li, Zhe ^{[2
]}

Xia, Yili ^{[1
]}

Wang, Kai ^{[1
]}

Pei, Wenjiang ^{[1
]}

机构：

[1] Southeast Univ, Sch Informat Sci & Engn, Nanjing 210096, Jiangsu, Peoples R China

[2] Soochow Univ, Sch Elect & Informat Engn, Suzhou 215006, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2019年 / 23卷 / 04期

基金：

中国国家自然科学基金;

关键词：

RFID; anti-collision; impropriety; WLMMSE; multi-antenna; SIGNAL;

D O I：

10.1109/LCOMM.2019.2902545

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In a multi-tag radio frequency identification (RFID) system, signals sent from different tags are likely to interfere with others, leading to a degradation in the transmission quality. To solve this problem, a novel widely linear minimum-mean-square-error (WLMMSE) anti-collision method is proposed by taking into account the improper second-order statistics of backscattered tag signals, which result from the quadrature nature of RFID readers. The proposed method provides an efficient means to separate multiple overlapping tag signals within a single time slot and can be easily integrated into multi-antenna RFID systems to improve their throughput. Its modeling advantages over conventional linear model-based signal recovery methods are illustrated by both the simulations and real-world experiments.

引用

页码：644 / 647

页数：4

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