Intensive small cellular network user grouping and self-adaptive interference suppression method

A network user and interference suppression technology, applied in network planning, multiplexing communication, orthogonal multiplexing systems, etc., can solve the problem of no dense small cell network, co-channel interference, and channel information overhead that the actual system cannot bear. And other issues

CN106506109AActive Publication Date: 2017-03-15NANTONG RES INST FOR ADVANCED COMM TECH CO LTD
4 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-03-15

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an intensive small cellular network user grouping and self-adaptive interference suppression method. The intensive small cellular network user grouping and self-adaptive interference suppression method comprises the steps that: firstly, a central processing unit groups users by utilizing large-scale fading channel information of each user, the users in the same group use the same pilot frequency, and the users of different groups use different orthogonal pilot frequencies; secondly, each small cellular base station determines adjacent intergroup interference users by utilizing the large-scale fading channel information of the users, and estimates channel vectors of the adjacent users by utilizing received uplink pilot frequency; if intergroup interference users do not exist, an uplink can adopt maximum ratio combination (MRC) reception and a downlink can adopt maximum ratio transmission (MRT) precoding; and if the intergroup interference users exist, the uplink can adopt zero-forcing reception and the downlink can adopt zero-forcing precoding transmission, so as to eliminate intergroup interference. The intensive small cellular network user grouping and self-adaptive interference suppression method can reduce pilot frequency pollution and reduce system pilot frequency overhead by adopting the simple user grouping method; moreover, the small cellular base stations eliminate the intergroup interference in a self-adaptive manner, and can effectively improve the spectral efficiency of the system.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a dense small cellular network wireless communication technology, in particular to a method for suppressing user grouping and intergroup interference based on pilot frequency multiplexing. Background technique

[0002] Dense small cell network is considered to be an effective technology to greatly improve the spectrum efficiency and power efficiency of the system. Compared with the traditional cellular network, the dense small cell network can greatly shorten the access distance between the user terminal and the sending node by densely deploying low-cost, low-power small cell base stations, thereby obtaining low propagation loss and high spatial multiplexing gain . Due to the densification of the network, the dense small cell network can allow more users to be served simultaneously in the same frequency band. However, the available orthogonal pilot resources are limited. As the number of users increases, dense small cell netw...

Examples

Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0051] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] The dense small cell network system model of this embodiment is as follows figure 1 As shown, considering the time division duplex (TDD) transmission mode, assuming that a cell has N small cells, each small cell is equipped with a small cell base station equipped with M antennas, and is connected to the central processing unit through a limited-capacity backhaul link . The number of users served by the same frequency band in the entire cell is K, and each user is configured w...