Modeling of Passive Intermodulation Distortion Using the Neural Networks and the Cubic Volterra Filter

Jang, Beomhee; Im, Sungbin; Kim, Chonghoon; Hong, Sung-Ho

doi:10.1109/ictc46691.2019.8939785

Cited by 4 publications

(14 citation statements)

References 11 publications

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“…However, the implementation of this method requires network downtime during the maintenance window, which poses a practical limitation. Jang et al [111,112] described a Focused Time Delay Neural Network for modeling IM3, but its applicability is limited to addressing IM3 exclusively. Additionally, Mismar proposed a supervised approach using linear regression to detect IM interference without the need to inject test tones or channel noise [92].…”

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

“…A straightforward method for canceling the IM3 with memory characteristics using the Volterra series in two different bands was proposed in [89,111]. This method can be extended to cancel the higher-order IM products.…”

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

“…To demonstrate this approach, consider the baseband complex representations of the transmitted signals f 1 and f 2 as x 1 (n), and x 2 (n), respectively. The received baseband UL signal y(n) with center frequency f RX = 2f 1 − f 2 is given by [89,99,111]…”

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

“…A memory length of M is considered, and the nonlinear relationship between p(n) and the DL signals (x 1 (n) and x 2 (n)) is described by the function H[.]. This relationship can be expressed as [89,111]…”

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

“…The PIM located at the center frequency f RX = 2f 1 − f 2 is generated from passband signals with two different frequencies, which are complex conjugates of x 1 , and x 2 [55]. When a two-tone 3rd order polynomial with a memory length of M-1 is considered, the model PIM p(n) can be expressed as [89,111]…”

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

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Passive Intermodulation Effects in Modern Radio Communication Systems

Ahmmed

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Passive Intermodulation (PIM) is a well-known phenomenon that poses a significant challenge to modern wireless communication systems. Despite efforts to reduce or mitigate PIM through hardware design, frequency planning, and band separation techniques, the impact of PIM on radio performance remains substantial. Particularly, radio transceivers operating in the frequency division duplex mode are known to be susceptible to PIM problems. Moreover, with the adoption of carrier aggregation and advanced multi-antenna technology, PIM is increasingly becoming a major issue in multi-band multi-standard radio systems. Therefore, innovative approaches that exploit PIM detection, avoidance, and cancellation techniques are required to effectively mitigate or reduce its impact. In response to these challenges, this thesis highlights various PIM interference mechanisms and their interactions that can potentially lead to sensitivity degradation. The thesis continues with a discussion of PIM mitigation approaches and underscores the potential of digital PIM cancellation (PIMC) solutions to offer a hardware-independent resolution for reducing PIM impact in multi-band radios in the 5G era and beyond. Two key contributions are presented as follows:2. Dr. Adnan Kiayani of Ericsson AB, Sweden, for his mentorship, technical expertise, and insightful discussions that enriched my understanding of the subject matter. His mentorship has been instrumental in shaping this thesis.3. Thesis supervisor, Chancellor's Professor Halim Yanikomeroglu, for his unwavering support, guidance, and dedication to my academic development.

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Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

Section: Examples Of Digital Pim Cancellationmentioning

confidence: 99%

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Passive Intermodulation Effects in Modern Radio Communication Systems

Ahmmed

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Overview of Passive Intermodulation in Modern Wireless Networks: Concepts and Cancellation Techniques

Ahmmed,

Kiayani,

Shubair

et al. 2023

IEEE Access

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Passive Intermodulation (PIM) is a well-known phenomenon that poses a significant challenge to modern wireless communication systems. Although efforts have been made to reduce or mitigate the PIM through hardware design, frequency planning, and/or band separation techniques, the impact of PIM on radio performance remains significant. This is especially true for radio transceivers operating in the frequency division duplex mode, which are known to be susceptible to PIM interference. Moreover, with the adoption of carrier aggregation and advanced multi-antenna technology, PIM is increasingly becoming a major problem in multi-band multi-standard radio systems. Therefore, innovative approaches that exploit PIM detection, avoidance, and cancellation techniques are required to effectively mitigate or reduce its impact. In response to these challenges, this study highlights various PIM interference mechanisms and their interactions which cause potential receiver sensitivity degradation. The discussion further explores PIM mitigation strategies, and underscores the potential of digital PIM cancellation solutions to offer a hardware-independent resolution for reducing PIM impact in multi-band radios, in the 5G era and beyond in radio systems.

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