On the Unique Channel Identification in Ambient Backscatter Communication Systems

被引：0
|
作者：
Cheng, Qi [1 ]
Liyanapathirana, Ranjith [1 ]
机构：
[1] Western Sydney Univ, Sch Engn Design & Built Environm, Locked Bag 1797, Penrith, NSW 2751, Australia
来源：
IETE TECHNICAL REVIEW | 2024年
关键词：
Ambient backscatter communication system; Channel estimation; Hybrid Cramer-Rao bound;
D O I：
10.1080/02564602.2024.2379277
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：
Channel coefficient estimation is a challenging problem in ambient backscatter communication systems. In this paper, unique identification of channel coefficients using the Expectation-Maximization (EM) method is investigated. It is proven that the EM method is not able to always yield unique solutions to channel coefficients and therefore the tag symbol estimation accuracy can be compromised. A correct derivation of the hybrid Cramer-Rao Bound (HCRB) is also provided.
引用
收藏
页码：709 / 715
页数：7
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