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Data sending method and device

A data transmission method and a technology of a data transmission device, which are applied in the communication field to achieve the effects of achieving coverage requirements, reducing synthesis difficulty and power loss, and improving channel estimation accuracy

Active Publication Date: 2012-05-16
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0018] Aiming at the defect that in the TD-SCDMA system, only a unit beam antenna with a beam width of 90° can be used to synthesize a broadcast beam with a beam width of 65° through the sector forming coefficient, the present invention solves how to reduce the synthesis difficulty and power loss in LTE , the technical problem of improving the accuracy of channel estimation

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Embodiment Construction

[0049] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0050] In the present invention, the forming coefficient refers to the forming coefficient used in the traditional beamforming method, which is different from the port forming coefficient in the present invention. The antenna itself has a unit pattern, which is called a unit beam. The equivalent pattern generated by multiple antennas constituting a port using shaping coefficients is called a port beam. For a port, since there may be multiple shape factor, multiple port beams are therefore possible. The multiple antennas constituting a port are called a port array to distinguish it from an antenna array, and a port array is composed of some or all of the antennas in ...

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Abstract

The invention discloses a data sending method. The method comprises the following steps that: a base station calculates a plurality of port forming coefficients according to a reference port forming coefficient and an array response; the base station corresponds the port forming coefficients to each frequency band of a port, wherein different frequency bands are corresponding to different port forming coefficients; and the base station sends data to a terminal by the port. In addition, the invention also discloses a data sending device. Therefore, in the method, a plurality of port forming coefficients are adopted, and each port forming coefficient generates a port wave-beam which is narrower than a unit wave-beam, thereby reducing the difficulty of synthesis and the loss of power, and improving the accuracy of channel estimation so as to reach coverage requirements.

Description

technical field [0001] The invention relates to the communication field, in particular to a data sending method and a data sending device. Background technique [0002] In the TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system, a unit beam antenna with a beam width of 90° is used to synthesize a broadcast beam with a beam width of 65° through the shaping coefficient; [0003] In LTE (Long Term Evolution, long-term evolution), if a 65° unit beam is used and the 8-antenna antenna form of 4+4 dual polarization is still considered, then the problem is how to generate a 65° broadcast by a 65° unit beam antenna beam. [0004] An important requirement for broadcast coverage is the width of the broadcast beam. If the broadcast beam is too wide, the overlapping area between adjacent sectors will increase, resulting in increased inter-sector interference; if the broadcast beam is too narrow, the overlapping area between adjacent sectors will be smaller. The to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCY02D30/70
Inventor 张静高卓李传军于洋
Owner DATANG MOBILE COMM EQUIP CO LTD