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A Multi-cell Cooperative Transmission Method Based on Interference Utilization

A technology of multi-cell cooperation and transmission method, which is applied in the field of multi-cell cooperative transmission based on interference utilization, can solve problems such as reducing optimization space, achieve the effect of increasing optimization space, improving measurement scale, and reducing average symbol error rate

Active Publication Date: 2021-08-13
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Traditional precoding treats interference as harmful, which reduces the optimization space in the process of dealing with interference

Method used

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  • A Multi-cell Cooperative Transmission Method Based on Interference Utilization
  • A Multi-cell Cooperative Transmission Method Based on Interference Utilization
  • A Multi-cell Cooperative Transmission Method Based on Interference Utilization

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Embodiment Construction

[0044] The present invention provides a multi-cell cooperative transmission method based on interference utilization. The applied wireless transmission system includes two cells, the base station of each cell is equipped with M antennas, and the number of users served by each base station is K, so The served users are equipped with a single antenna.

[0045] see figure 1 , the present invention is a multi-cell cooperative transmission method based on interference utilization, comprising the following steps:

[0046] S1. The two base stations share data information but do not share new channel state information. The two base stations transmit information to all service users at the same time, and the transmitted information symbols adopt the MPSK modulation method;

[0047] S2. Using a symbol-level precoding method, calculate the measurement scale for the user in the cell to receive the signal transmitted by the base station in the own cell and the measurement scale for the si...

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Abstract

The invention discloses a multi-cell cooperative transmission scheme based on interference utilization. The base station in each cell is equipped with M antennas, the number of users served in each base station is K, and the served users are equipped with a single antenna; two adjacent base stations Simultaneously send information to all service users in the two cells; then use symbol-level precoding to calculate the signal received by the user in the cell from the base station in its own cell and the signal leaked from the base station in the cell to the user serving in the adjacent cell The measurement scale of the interference signal; design the precoding vector of the base station to maximize the sum of the minimum measurement scale of the service user’s received signal and the minimum measurement scale of the leaked signal in its own cell; use the distributed processing method to solve the optimal precoding vector of the base stations in two adjacent cells respectively. Encoding vectors to determine the precoding scheme. The invention improves the signal quality of the signal received by the overall receiving end, reduces the average symbol error rate of the receiving end, and improves the throughput of the system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-cell cooperative transmission method based on interference utilization. Background technique [0002] Future communication systems will put forward higher requirements for data transmission rate and service quality. MIMO technology makes full use of space resources, which can significantly improve the data transmission rate and system capacity. The introduction of MIMO technology in a multi-cell system can significantly improve the throughput of the system. However, because the transmit power of the base station is generally large, the interference between multiple cells becomes a non-negligible problem in the multi-cell MIMO system. [0003] In the downlink multi-cell multi-user system, considering that the processing capability of the base station is generally much higher than that of the users, precoding technology can be used at the base s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0456H04B7/06H04B17/336H04L27/20H04B7/024
Inventor 吕刚明杨建平李鲁朋廖学文李国兵
Owner XI AN JIAOTONG UNIV
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