Signal Distortion by Analog Filters in RF Front-End Circuits at Wireless Receivers

Xinzhe Pi

¹School of Systems Information Science, Future University Hakodate, Hakodate, Hokkaido, 041-8655, Japan

²School of Computer Science and Technology, Xidian University, Xi’an, Shaanxi, 710071, China

*Corresponding author

Radio frequency front-end (RFFE) circuit design significantly improves signal quality for demodulation and decoding in wireless receivers. Due to the diversity and complexity of circuit designs, as well as potential distortions to signals, there is no theoretical model to measure the impact of RFFE circuits on radio signals. To address this critical and challenging issue, we first focus on analog filters in RFFE circuits, which directly affect signal reception and carrier recovery, and consequently influence the demodulation error probability. In this paper, we discuss the role of analog filters in RFFE circuits and the model of their effect on signals. We also introduce different types of distortions caused by analog filters, which are related to signal amplitude, phase, and frequency. Based on these, we propose using the Wiener model to characterize the impact of analog filters on signals considering nonlinear distortions. This work may shed light on developing a feasible analytical model of how RFFE circuits influence demodulation errors at wireless receivers.

Wireless communication, signal distortion, RFFE circuit, analog filter, nonlinear model

Xinzhe Pi, Meiyun Xie, Yu Zhang (2024). Signal Distortion by Analog Filters in RF Front-End Circuits at Wireless Receivers. Journal of Networking and Network Applications, Volume 4, Issue 3, pp. 137–144. https://doi.org/10.33969/J-NaNA.2024.040305.

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