Digital Cancellation of Passive Intermodulation: Method, Complexity and Measurements

This paper addresses digital cancellation of passive intermodulation (PIM) products in simultaneous transmit-receive systems, with specific emphasis on frequency-division duplexing (FDD) based LTE and 5G New Radio (NR) networks. Building on mathematical modeling of the passive intermodulation, a com...

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Published in2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond (IMC-5G) pp. 1 - 3
Main Authors Waheed, Muhammad Zeeshan, Korpi, Dani, Kiayani, Adnan, Anttila, Lauri, Valkama, Mikko
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2019
Subjects
5G NR
Baseband
carrier aggregation
Complexity theory
flexible duplex
frequency division duplexing
Interference cancellation
Long Term Evolution
LTE
nonlinear distortion
passive intermodulation
radio coexistence
Radio frequency
Receivers
Transceivers
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Summary:This paper addresses digital cancellation of passive intermodulation (PIM) products in simultaneous transmit-receive systems, with specific emphasis on frequency-division duplexing (FDD) based LTE and 5G New Radio (NR) networks. Building on mathematical modeling of the passive intermodulation, a computationally efficient digital cancellation and associated parameter learning solutions are derived and presented. The performance of the method is analyzed through interband carrier aggregation based RF measurements at LTE/NR bands 1 and 3. The measurement results show that the proposed canceller can efficiently cancel the PIM products towards t he receiver noise floor. Additionally, t he proposed canceller is shown to be of substantially lower complexity compared to the reference methods.
DOI:10.1109/IMC-5G47857.2019.9160361