Half-blind channel estimation method for joint cooperative clustering of cloud wireless access network

一种无线接入网络、协作簇的技术，应用在无线电传输系统、传输路径子信道分配、位置分集等方向，能够解决网络数据传输效率低、导频开销大、没有考虑到系统性能等问题

Active Publication Date: 2017-12-26
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] The channel estimation method in the prior art has a large pilot overhead, and does not take into account the use of appropriate clustering to improve system performance, resulting in low network data transmission efficiency

Method used

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Embodiment Construction

[0061] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0062] In the cloud wireless access network transmission scenario, in the traditional uplink channel estimation method, first all users send their pilot information to the remote radio unit at the same time, and the remote radio unit amplifies and superimposes the received user information The own pilot signal is forwarded to the centralized baseband processing unit pool, and the centralized baseband processing unit pool processes the received pilot signal to obtain channel state information. Since the channel state information is estimated entirely based on the pilot, in order to improve the estimation accuracy, it is necessary to increase the length of the pilot and reduce the data transmission rate.

[0063] In order to reduce the pilot overhead of the traditional uplink channel estimation method, the present invention can evaluate the correspondin...

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Abstract

The invention discloses a half-blind channel estimation method for joint cooperative clustering of a cloud wireless access network and belongs to the field of the cloud wireless access network. The method comprises the specific steps that all users send pilot and data information to remote radio units; after the pilot and data information is amplified by the remote radio units, own pilot information of the remote radio units is superposed with the amplified information; the information is forwarded to a centralized baseband processing unit pool; the centralized baseband processing unit pool processes the information to obtain channel state information; cooperative clusters are divided for the remote radio units; combination-split operation is carried out; utility functions corresponding to different clustering modes are evaluated, thereby obtaining the optimum clustering mode; corresponding processing is carried out on the received information of various clusters in the centralized baseband processing unit pool through utilization of the half-blind channel estimation method, thereby obtaining independent channel state information of access links and forward links; and data information is demodulated. According to the method, the pilot cost required by channel estimation is effectively reduced, and the data transmission efficiency of the cloud wireless access network is clearly improved.

Description

technical field [0001] The invention relates to the field of cloud wireless access networks, in particular to a semi-blind channel estimation method for joint cooperative clustering of cloud wireless access networks. Background technique [0002] In order to solve the pressure brought by the data transmission and processing of the system, the cloud wireless access network has become an important network architecture adopted in the 5G wireless communication system. However, in channel estimation, the pilot overhead will occupy additional wireless resources, thus causing the system data transmission rate to decrease. At the same time, reasonable control of the collaboration scale of the cloud wireless access network can also improve system data transmission performance. [0003] The channel estimation method in the prior art has a large pilot overhead, and does not take into account the use of appropriate clustering to improve system performance, resulting in low network data...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L5/00H04B7/026H04B7/08
CPCH04B7/026H04B7/0854H04L5/0048H04L25/0222H04L25/0238H04L25/0242H04L25/0256
Inventor 赵中原李瑛王珂杨大全王文博
Owner BEIJING UNIV OF POSTS & TELECOMM
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