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Downlink multi-business collaboration pre-coding method of multi-cell multicast MIMO (multiple input multiple output) mobile communication system

A mobile communication system and multi-service technology, which is applied in the field of downlink multi-service cooperative precoding, can solve the problem that the downlink joint precoding has not been effectively solved, and achieve the effects of enhancing coverage, reducing interference, and reducing computational complexity

Inactive Publication Date: 2012-12-19
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

[0013] From the above analysis, it can be seen that the downlink joint precoding applicable to multi-cell multi-service multicast system has not been effectively solved.

Method used

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  • Downlink multi-business collaboration pre-coding method of multi-cell multicast MIMO (multiple input multiple output) mobile communication system
  • Downlink multi-business collaboration pre-coding method of multi-cell multicast MIMO (multiple input multiple output) mobile communication system
  • Downlink multi-business collaboration pre-coding method of multi-cell multicast MIMO (multiple input multiple output) mobile communication system

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Embodiment Construction

[0023] 1. Examples of typical scenarios for program implementation:

[0024] The present invention can be used in a MIMO multicast cellular system where the base station is configured with multiple antennas and the mobile station is configured with a single antenna. In addition, the base station is required to obtain the downlink channel information received by each mobile station whose signal strength is higher than a certain threshold. The schematic diagram of the application scenario is as follows figure 2 shown.

[0025] 2. The equipment used in this technical solution

[0026] The solution proposed by the present invention can be used in the base station transmitter module of the system. The system block diagram of the cooperative precoding method proposed by the present invention is as follows image 3 shown.

[0027] 3. Implementation steps:

[0028] a) Circuit design of the base station equipment: Carry out circuit design on the base station equipment, and provide ...

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Abstract

The invention relates to a downlink multi-business collaboration pre-coding method of a multi-cell multicast MIMO (multiple input multiple output) mobile communication system. The method mainly comprises the following steps that: firstly, a mobile station performs channel estimation by use of a pilot signal, and estimates the downlink channel from each base station thereto; a received signal intensity threshold is set at the mobile station end; the downlink channel vector and the business sequence number that the mobile station expects to receive are fed back to the base station of which the received signal intensity is higher than the threshold; each base station receives the channel vectors fed back by all users expecting to receive the multicast business as well as the interference coefficient among different businesses; and iteration optimization is performed for the power distribution and beam forming vector among different businesses to finally obtain the power distribution and beam forming vector among different businesses. By adopting the collaboration pre-coding method provided by the invention in the multi-cell multicast MIMO mobile communication system, the system performance can be effectively improved, the interference among different businesses is reduced, and the coverage effect of cell edge users is enhanced.

Description

technical field [0001] The invention relates to a downlink multi-service cooperative precoding method for a multi-cell multicast MIMO mobile communication system, belonging to the field of mobile communication. Background technique [0002] Multicast technology can effectively solve the transmission problems of multimedia and other data services in future mobile communication systems, and has broad application prospects. However, unlike previous unicast systems, the base station sends the same data to all target users with the same power, so that the impact of large-scale fading cannot be compensated, so the coverage of users at the edge of the cell is poor, and there are often multiple multicast services in the cell , Different services are distinguished through multiple access methods, such as OFDMA, SDMA, etc., and the difference in multiple access methods affects the interference coefficient between different services. This causes interference between different services...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04B7/04
CPCY02D30/70
Inventor 陈明杜博王楠
Owner SOUTHEAST UNIV
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