Effect of nonlinear detection response characteristics of electric field probe on LTE signal measurement and statistical evaluation of its detection response

I Wu, Y Shimizu, Y Matsumoto, K Gotoh… - IEEE Transactions …, 2021 - ieeexplore.ieee.org
I Wu, Y Shimizu, Y Matsumoto, K Gotoh, K Wake, S Watanabe
IEEE Transactions on Electromagnetic Compatibility, 2021ieeexplore.ieee.org
To improve the calibration accuracy of an electric field (E-field) probe loaded with a diode
detector for digital wireless communication signals with complex waveforms, the effect of the
nonlinear characteristics of the E-field probe on the detection response of a long-term
evolution (LTE) signal is investigated. In this article, we focused on single-carrier frequency
division multiple access (SC-FDMA) and orthogonal frequency-division multiplexing access
(OFDMA) signals used for LTE uplink and downlink, respectively. First, we investigated the …
To improve the calibration accuracy of an electric field (E-field) probe loaded with a diode detector for digital wireless communication signals with complex waveforms, the effect of the nonlinear characteristics of the E-field probe on the detection response of a long-term evolution (LTE) signal is investigated. In this article, we focused on single-carrier frequency division multiple access (SC-FDMA) and orthogonal frequency-division multiplexing access (OFDMA) signals used for LTE uplink and downlink, respectively. First, we investigated the effect of the nonlinear characteristics of the E-field probe on the detection response of continuous SC-FDMA and OFDMA signals simulating frequency division duplexing LTE. Then, intermittent SC-FDMA and OFDMA signals simulating time-division LTE were also investigated. Furthermore, we proposed a method of estimating the detection response of SC-FDMA and OFDMA signals using the probability density function of the envelope amplitude. When the envelope variation of the LTE signal is fully covered within the response time of the E-field probe, the estimated detection response agrees well with the measured result. In addition, the detection response of an intermittent LTE signal with a typical repetition period can be calculated with the proposed approximation formula by separately considering the probability density functions of the envelope amplitude for the burst and nonburst periods.
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