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oaioai:jupiter.its.unimelb.edu.au:11343/234112

Channel Estimation for Ambient Backscatter Communication Systems With Massive-Antenna Reader

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Publication date
1 August 2019
Publisher
'Institute of Electrical and Electronics Engineers (IEEE)'
Doi

    Abstract

    Ambient backscatter, an emerging green communication technology, has aroused great interest from both academia and industry. One open problem for ambient backscatter communication (AmBC) systems is channel estimation for a massive-antenna reader. In this paper, we focus on a channel estimation problem in AmBC systems with a uniform linear array at the reader consisting of large number of antennas. We first design a two-step method to jointly estimate channel gains and direction of arrivals (DoAs), and then refine the estimates through angular rotation. Additionally, Cramér-Rao lower bounds are derived for both the modulus of the channel gain and the DoA estimates. Simulations are then provided to validate the analysis, and to show the efficiency of the proposed approach

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