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Digital cancellation of multi-band passive inter-modulation based on Wiener-Hammerstein model

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Digital cancellation of multi-band passive inter-modulation based on Wiener-Hammerstein model
Utilizing multi-band and multi-carrier techniques enhances throughput and capacity in Long-Term Evolution(LTE)-Advanced and 5G New Radio(NR)mobile networks.However,these techniques introduce Passive Inter-Modulation(PIM)interference in Frequency-Division Duplexing(FDD)systems.In this paper,a novel multi-band Wiener-Hammerstein model is presented to digitally reconstruct PIM interference signals,thereby achieving effective PIM Cancellation(PIMC)in multi-band scenarios.In the model,transmitted signals are independently processed to simulate Inter-Modulation Distortions(IMDs)and Cross-Modulation Distortions(CMDs).Furthermore,the Finite Impulse Response(FIR)filter,basis function generation,and B-spline function are applied for precise PIM product estimation and generation in multi-band scenarios.Simulations involving 4 carrier components from diverse NR frequency bands at varying transmitting powers validate the feasibility of the model for multi-band PIMC,achieving up to 19 dB in PIMC performance.Compared to other models,this approach offers superior PIMC performance,exceeding them by more than 5 dB in high transmitting power scenarios.Additionally,its lower sampling rate requirement reduces the hardware complexity associated with implementing multi-band PIMC.

Passive inter-modulationFrequency-division duplexingNonlinear distortionDigital cancellationSpline interpolationWiener-Hammerstein model

Jinxiang Liu、Xiaotao Zhang、Jun Yang、Huiping Yang

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School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510641,China

Huawei Technologies Co.,Ltd,Dongguan 523808,China

School of Electronic and Information Engineering,South China Normal University,Guangzhou 510631,China

Passive inter-modulation Frequency-division duplexing Nonlinear distortion Digital cancellation Spline interpolation Wiener-Hammerstein model

2024

10.1016/j.dcan.2024.06.002

数字通信与网络(英文)

数字通信与网络(英文)

ISSN：
年,卷(期)：2024.10(4)