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Multi-cell cooperative transmission scheme based on interference utilization

A multi-cell cooperation and transmission scheme technology, applied in transmission systems, transmission monitoring, radio transmission systems, etc., can solve problems such as reducing optimization space, achieve the effects of reducing the average symbol error rate, improving signal quality, and simplifying the system model

Active Publication Date: 2019-06-14
XI AN JIAOTONG UNIV
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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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  • Multi-cell cooperative transmission scheme based on interference utilization
  • Multi-cell cooperative transmission scheme based on interference utilization
  • Multi-cell cooperative transmission scheme based on interference utilization

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Embodiment Construction

[0044] The present invention provides a multi-cell cooperative transmission scheme 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 , a multi-cell coordinated transmission scheme based on interference utilization in the present invention, 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, and the scheme comprises the steps: configuring M antennas in a base station of each cell, enabling the number of users served in each base station to be K, and configuring single antennas for the served users; the two adjacent base stations send information to all the service users in the two cells at the same time; secondly, respectively calculating measurement scales of interference signals which are received by users in a cell and are transmitted by a base station in the cell and are leaked to users served by an adjacent cell by the base station in the cell by adopting a symbol-level pre-coding mode; designing a precoding vector of the base station to maximize the sum of a minimum measurement scale of a service user receiving signal and a minimum measurement scale of a leakage signal in a cell of the base station; and respectively solving the optimal precoding vectors of two adjacent cell base stations by adopting a distributed processing method, and determining a precoding scheme. The signal quality of the signal received by the overall receiving end is improved, the averagesymbol error rate of the receiving end is reduced, and the throughput of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-cell cooperative transmission scheme 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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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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