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Maximum-Eigenvalue Detector for Multiple Antenna Ambient Backscatter Communication Systems
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DOI：10.1109/TVT.2019.2946877.png)
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Abstract
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This paper investigates the symbol detection of the multiple antenna ambient backscatter communication systems. In particular, to overcome the problem of the noise uncertainty, the maximum-eigenvalue detector is derived from the general likelihood ratio test, and the approximate bit error rate (BER) performance is characterized. The analytical results show that the BER of the maximum-eigenvalue detector converges to a fixed number in large signal-to-noise ratio or number of receiving antennas M regime. Finally, numerical results are presented to confirm the correctness of theoretical analysis, and reveal that the maximum-eigenvalue detector outperforms the energy detector regarding the BER performance.
Keywords:
Ambient backscatter
maximum-eigenvalue detector
noise uncertainty
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