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http://dx.doi.org/10.7471/ikeee.2020.24.4.1028

Design and Implementation of In-band Interference Reduction Module  

Kang, Sanggee (School of Computer Information and Communication Engineering, Kunsan National University)
Hong, Heonjin (Electronics and Telecommunications Research Institute)
Chong, Youngjun (Electronics and Telecommunications Research Institute)
Publication Information
Journal of IKEEE / v.24, no.4, 2020 , pp. 1028-1033 More about this Journal
Abstract
The existing in-band interference reduction method recommends the physical separation distance between wireless devices and interference signals, and the interference can be suppressed through the separation distance. If the in-band interference signals can be reduced in a wireless device, a margin can be given to the physical separation distance. Since there is an effect of extending the receiver dynamic range of receivers, it is highly useful for interference reduction and improvement method. In this paper, the structure of an in-band analog IRM(Interference Reduction Module) is proposed and the design and implementation of the proposed analog IRM are described. To design an analog IRM, the interference reduction performance according to the delay mismatch, phase error and the number of delay lines that affect the performance of the analog IRM was simulated. The proposed analog IRM composed of 16 delay lines was implemented and the implemented IRM has the interference reduction performance of about 10dB for a 5G(NR-FR1-TM-1.1) signal having a 40MHz bandwidth at a center frequency of 3.32GHz. The analog IRM proposed in this paper can be used as an in-band interference canceller.
Keywords
in-band interference; interference cancellation; cancellation performance; delay mismatch; phase error;
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