Multi-user beam shaping method and device based on frequency division duplex system

A beamforming method and frequency division duplexing technology, applied in diversity/multi-antenna systems, transmission systems, radio transmission systems, etc., can solve problems such as lack of technical guidance
CN101800581AInactive Publication Date: 2010-08-11ZTE CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2010-08-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a multi-user beam shaping method based on a frequency division duplex system. A base station groups for downlink signals of each user terminal based on information of arrival angles reported by more than one user terminal and carries out beam shaping on the downlink signals in each group, wherein the main lobe direction of downlink signals subjected to beam shaping in each group is arranged in the arrival angle direction reported by a user terminal located by the downlink signals, and the null steering direction is arranged in the main lobe direction of the other downlink signals. The invention also discloses a device for realizing the method. The invention ensures that interference between downlink signals of every two user terminals in each group is further lowered and the downlink signals in the same group can use resources of simultaneous frequency, thereby enhancing the volume of the frequency division duplex system while ensuring the quality of communication.
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Description

technical field

[0001] The present invention relates to a multi-user beamforming (beamforming) method and device based on a Frequency Division Duplex (FDD, Frequency Division Duplex) system. Background technique

[0002] A Multiple Input and Multiple Output (MIMO, Multiple Input and Multiple Output) system has become a technology that has attracted much attention in a Long Term Evolution (LTE, Long Term Evolution) system due to improved channel capacity. In the multi-user MIMO mode, the direction of the shaped beam is designed by designing the weight vector of the appropriate transmitting antenna and receiving antenna, so as to distinguish the signals of multiple users and remove the interference between users.

[0003] The beamforming method distinguishes users according to their location, so that multiple users can reuse the same time and frequency resources. For the case of small antenna spacing (0.5λ), it is more beneficial to control the pointing of the beam. Beamform...

Claims

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