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Passive intermodulation interference elimination method in communication system based on time 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, inability to guarantee satisfaction, high cost overhead, etc., and achieve the effect of full network configuration flexibility

Active Publication Date: 2021-06-25
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.

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  • Passive intermodulation interference elimination method in communication system based on time delay calibration algorithm
  • Passive intermodulation interference elimination method in communication system based on time delay calibration algorithm
  • Passive intermodulation interference elimination method in communication system based on time delay calibration algorithm

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Embodiment Construction

[0110] The technical solutions in the embodiments of the present invention will be further clearly and completely described below in conjunction with the accompanying drawings.

[0111] 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 invention provides a method and equipment for eliminating passive intermodulation interference in a communication system based on a time delay calibration algorithm independent of existing mobile network communication equipment (BBU and RRU), and belongs to the field of communication. A special passive intermodulation elimination device EPIMC is additionally arranged between a wireless communication base band unit BBU and a plurality of radio remote units RRU which are centrally deployed in a region, so that the burden of the existing network communication device is not changed and increased while the interference suppression effect is ensured. And meanwhile, the volume of PIM interference suppression service can be provided according to the actual needs of deployment networks in different regions, and EPIMC equipment units with different capabilities are equipped, so that sufficient network configuration flexibility is realized.

Description

technical field [0001] The embodiment of the present invention relates to the communication field, and more specifically, relates 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 be...

Claims

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Application Information

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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