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Multi-base station system and its channel correction method

A channel correction, multi-base station technology, applied in transmission systems, digital transmission systems, transmission path sub-channel allocation, etc., can solve the problems of inaccurate channel correction, reduce system capacity, etc., and achieve the effect of reducing the impact

Active Publication Date: 2021-02-26
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carrier frequency offset may cause, for example, sampling clock offset (Sampling Clock Offset, SCO), downlink and uplink channels have opposite linear phases, etc., resulting in Inter-Cell Interference (ICI) and inter-user interference (Inter-UserInterference, IUI), reduce system capacity
[0004] In addition, when performing channel correction, frequency selective channel fading (frequency selective channel fading) will occur due to the different distances between the reference device and each base station, thereby making channel correction inaccurate

Method used

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  • Multi-base station system and its channel correction method
  • Multi-base station system and its channel correction method
  • Multi-base station system and its channel correction method

Examples

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Embodiment Construction

[0040] Please refer to figure 1 , figure 1 A system block diagram of a multi-base station system according to an embodiment of the present invention is shown. The multi-base station system 1 includes multiple base stations eNB_1~eNB_p, one or more reference devices RD_1~RD_q and a coordination server CS, where p is the number of base stations and p is an integer greater than 1, q is the number of reference devices and q is An integer greater than or equal to 1. Base stations eNB_1˜eNB_p may have multiple base station antennas, for example, Nt base station antennas, where Nt is an integer greater than 1. The reference devices RD_1˜RD_q may have one or more reference device antennas, for example, Nr reference device antennas, where Nr is an integer greater than or equal to 1. The base stations eNB_1-eNB_p are wirelessly connected to the reference devices RD_1-RD_q (indicated by dotted lines) respectively. The base stations eNB_1 ˜ eNB_p and the reference devices RD_1 ˜ RD_q ...

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Abstract

Multi-base station system and its channel correction method. The multi-base station system includes a coordinating server communicating with multiple base stations with multiple base station antennas and at least one reference device. The reference device communicates with the base station wirelessly, and a plurality of reference device antennas are arranged in the reference device. The coordinating server calculates a plurality of relative carrier frequency offsets according to received uplink channel information calculated by the plurality of base stations based on uplink reference signals transmitted through at least one reference device antenna. The coordinating server calculates a plurality of downlink channel information, uplink channel information and relative carrier frequency offset based on the received at least one reference device based on a plurality of downlink reference signals transmitted through at least one base station antenna of each base station , to calculate multiple channel correction coefficients.

Description

technical field [0001] The invention relates to a multi-base station system and a channel correction method thereof. Background technique [0002] A multi-cell system, especially a multi-cell coordination system (MCC system), can achieve the equivalent of a massive antenna (massive antenna) by coordinating multiple base stations to jointly transmit data to users. antenna) efficacy. [0003] In a multi-base station system, since the clock sources (Clock Source) of each base station are independent of each other, there is a carrier frequency offset (Carrier Frequency Offset, CFO) between the base stations. Carrier frequency offset may cause, for example, sampling clock offset (Sampling Clock Offset, SCO), downlink and uplink channels have opposite linear phases, etc., resulting in Inter-Cell Interference (ICI) and inter-user interference (Inter-UserInterference, IUI), reduce system capacity. [0004] In addition, when channel calibration is performed, frequency selective ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04L5/00
CPCH04L5/0048H04W56/002H04W56/0035
Inventor 许仁源陈家铭赖俊佑林明哲
Owner IND TECH RES INST