Enhanced Spectrally Aware RF Front End Receiver under Non-Linearity

In RF receivers nonlinearities are inherent to analog processing. This is the result of strong signals presence close to the bandwidth of the signal of interest, or a power excess of this signal. Both cases greatly deteriorate the receiver bit-error-rate. Most advanced nonlinearities equalization me...

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Bibliographic Details
Main Authors: Grollier, Nicolas, Houcke, Sebastien, Pelissier, Michael
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Harmonic analysis
Jamming
Linearity
Noise measurement
Receivers
Sensors
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Summary:In RF receivers nonlinearities are inherent to analog processing. This is the result of strong signals presence close to the bandwidth of the signal of interest, or a power excess of this signal. Both cases greatly deteriorate the receiver bit-error-rate. Most advanced nonlinearities equalization methods rely on subtraction mechanisms of the modeled intermodulation terms. In this article, we propose a proof of concept for a novel technique to limit the harmful effects of nonlinearities. It consists in making a measure of intermodulation terms power, thanks to a cyclostationary sensing mechanism. And then, to dynamically adapt receivers parameters to make it works in a linear regime. We detail principles of that method and develop the theoretical analysis of detection. Thanks to simulations, we show that this method is reliable and allows a nonlinearity detection 16dB below the compression point. This work was conducted in the scope of high end radio such as professional mobile radios (PMR) receiver.
ISSN:1938-1883
DOI:10.1109/ICC.2018.8422207