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Method and device of signal transmitting of antenna array to downstream channel in mobile communication system

A technology of a mobile communication system and an antenna array, applied in the field of downlink channel transmission methods and devices of a mobile communication system, capable of solving problems such as phase offset between a dedicated downlink channel and a common pilot channel, and achieving the effect of power balance

Inactive Publication Date: 2006-04-12
HUAWEI TECH CO LTD
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  • Application Information

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Problems solved by technology

[0011] The object of the present invention is to provide a method and device for transmitting downlink channel signals by an antenna array in a mobile communication system. The method and device solve the phenomenon that there is a phase offset between the downlink dedicated channel and the common pilot channel

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  • Method and device of signal transmitting of antenna array to downstream channel in mobile communication system
  • Method and device of signal transmitting of antenna array to downstream channel in mobile communication system
  • Method and device of signal transmitting of antenna array to downstream channel in mobile communication system

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] figure 2 A schematic diagram showing common channel and dedicated channel beam emission of an odd-numbered element antenna array. For an antenna array with an odd number of array elements, it is assumed that the number of array elements is M. public channel at Omni-directional transmission in the cell on array elements, forget it Indicates rounding up; dedicated channel signals for directional transmission. exist figure 2 The schematic diagram of fixed multi-beam is shown in , the array reference position of beam weights is at array elements, the beam weight w for transmitting dedicated channel signals is:

[0037]

[0038] In formula (2), j = - 1 , d is the element spacing of the array, λ is the carrier frequency wavelength, M is the number of array elemen...

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Abstract

A method and device for emitting signals to down channel by the antenna array in mobile communication system features that the center of antenna array is used as the reference position of array for emitting signals to down channel. The signals for common channel is omnibearingly emitted by the antenna at the reference position of array. The signals for private channel are directionally emitted by whole antenna array according to beam weight W. Its advantages are consistant phase for different channels and uniform power on antenna.

Description

technical field [0001] The invention relates to the smart antenna technology of the mobile communication system, in particular to a downlink channel transmitting method and device of the mobile communication system. Background technique [0002] As a key technology in the third generation mobile communication system, smart antenna technology plays an important role in improving system capacity and signal-to-noise ratio. [0003] The fixed multi-beam algorithm is a beamforming algorithm in the smart antenna technology. Since the central angle of the fixed beam does not exactly correspond to the user's location, the performance will be reduced, but there are many ways to make up for this shortcoming. Moreover, compared with the adaptive beam algorithm, the fixed multi-beam algorithm has great advantages in reducing the complexity of the algorithm and the amount of computation, so this algorithm is widely used in smart antenna technology. [000...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/30H04B7/26H01Q21/00H04B7/02
Inventor 史学鹏李江张劲林
Owner HUAWEI TECH CO LTD