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Passive Intermodulation Interference Elimination Method in Communication System Based on Delay Calibration Algorithm

A passive intermodulation and communication system technology, applied in the field of communication, can solve the problems of testing equipment software and hardware capabilities, high cost overhead, and inability to guarantee satisfaction, etc., and achieve the effect of full network configuration flexibility

Active Publication Date: 2021-09-17
NANJING DIGITGATE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In the existing PIM interference elimination solutions, it is necessary to replace the original BBU or / and RRU equipment in the communication network with a new equipment that supports the PIM interference elimination function, which brings extremely high cost overhead; or the original capability resources of the equipment Under the constraints, adding the realization of PIM interference cancellation function will greatly test the software and hardware capabilities of existing equipment, and at the same time, it cannot guarantee to meet the actual demand for PIM interference suppression service volume in different regional deployment networks.

Method used

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  • Passive Intermodulation Interference Elimination Method in Communication System Based on Delay Calibration Algorithm
  • Passive Intermodulation Interference Elimination Method in Communication System Based on Delay Calibration Algorithm
  • Passive Intermodulation Interference Elimination Method in Communication System Based on Delay Calibration Algorithm

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Embodiment Construction

[0128] The technical solutions in the embodiments of the present invention will be further clearly and completely described below in conjunction with the accompanying drawings.

[0129] Such as figure 1 Shown is the basic network architecture of a base station unit of a communication system, which usually includes a BBU device and multiple RRU devices (three RRU devices in the figure). In order to more clearly show the formation and impact of PIM interference signals, figure 1 It shows the left and right mirror images of the same base station unit. The left side of the dotted line depicts the downlink signal transmission process, and the right side of the dotted line depicts the uplink signal reception process. The downlink baseband signal issued by the BBU is processed by the RRU and modulated into multiple narrowband signals, and then transmitted by the antenna, and at the same time carries the PIM interference signal source caused by the nonlinearity of the analog device; ...

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Abstract

The present invention provides a method and equipment for eliminating passive intermodulation interference in a communication system based on a delay calibration algorithm independent of existing mobile network communication equipment (BBU and RRU), which belongs to the field of communication and utilizes centralized deployment in a region A dedicated passive intermodulation cancellation device EPIMC is added between the wireless communication baseband unit BBU and multiple remote radio unit RRUs. While ensuring the interference suppression effect, it does not change or increase the burden on the existing network communication equipment. At the same time, the volume of PIM interference suppression services can be provided according to the actual needs of the network deployed in different regions, and EPIMC equipment units with different capabilities can be equipped to achieve sufficient network configuration flexibility.

Description

technical field [0001] The embodiments of the present invention relate to the communication field, and more specifically, to the adaptive passive intermodulation (PIM) interference suppression of the time delay calibration algorithm and the realization of special equipment. Background technique [0002] Some dedicated English explanations that will be mentioned in this article: [0003] BBU: baseband unit; [0004] RRU: remote radio unit; [0005] CPRI: Common Radio Interface; [0006] EPIMC: passive intermodulation cancellation equipment; [0007] PIM: passive intermodulation; [0008] FFT: Fourier transform; [0009] IFFT: Inverse Fourier Transform. [0010] In a general wireless communication system, the wireless communication baseband unit BBU is responsible for the correlation calculation of the baseband signal and channel resource allocation. Channel resources can be divided into downlink and uplink: in the downlink channel, the BBU sends the downlink bearer to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04B17/364H04W88/08
CPCH04W56/0065H04W56/004H04B17/364H04W88/085
Inventor 李悦张宏泽吴春华张力
Owner NANJING DIGITGATE COMM TECH CO LTD