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Apparatus and method for controlling directivity of transmitting antenna

A technology for transmitting antennas and control devices, applied to antenna supports/mounting devices, antennas, antenna components, etc., can solve problems such as increasing the calculation amount of reverse link beamformers

Inactive Publication Date: 2004-09-22
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this increases the calculation amount of the reverse link beamformers 3-1 to 3-M and the maximum beam weight selection section 6

Method used

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  • Apparatus and method for controlling directivity of transmitting antenna
  • Apparatus and method for controlling directivity of transmitting antenna
  • Apparatus and method for controlling directivity of transmitting antenna

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Experimental program
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Effect test

Embodiment Construction

[0021] The present invention will be specifically described below with reference to the accompanying drawings.

[0022] figure 1 A transmission antenna directivity control device according to a first embodiment of the present invention is shown. refer to figure 1 The signals received by the N receiving array antenna units 101 - 1 to 101 -N are A / D converted by the A / D converters 102 - 1 to 102 -N corresponding to the above units. The A / D converted signals are output from the A / D converters 102-1 to 102-N to M beamformers 103-1 to 103-M, respectively.

[0023] The beamformers 103-1 to 103-M use the pre-calculated weighting coefficients to weight and combine the received signals through the multipliers 301-1 to 301-N, thereby generating M multi-beam outputs, such as figure 2 shown in . The formed M beams are output to the beam power detection section 104 and the beam output selection / combination section 105 .

[0024] The beam detection section 104 obtains M received sig...

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Abstract

In a transmission antenna directivity control apparatus, a reception multi-beam generation section executes weights and combines reception signals from reception array antenna elements using a preset weight coefficient to generate reception multi-beams. A transmission weight coefficient generation section generates, in accordance with detection powers of the reception multi-beams, a transmission weight coefficient for transmission data in correspondence with each of transmission multi-beams corresponding to transmission array antenna elements. A transmission multi-beam generation section multiplies the transmission data by the transmission weight coefficient to generate the transmission multi-beams and supplies them to the corresponding transmission array antenna elements. In the transmission weight coefficient generation section, a power ratio calculation section calculates a power ratio of a maximum power of the detection powers of the reception multi-beams to an adjacent power of the maximum power beam, which exhibits a larger power beam, and a transmission weight coefficient calculation section calculates the transmission weight coefficient on the basis of the power ratio. A transmission antenna directivity control method is also disclosed.

Description

technical field [0001] The present invention relates to an apparatus for receiving reverse link radio waves through a plurality of receiving array antenna units, and controlling the directivity of a forward link transmission signal to be transmitted from each of a plurality of transmitting array antenna units based on the received signal Transmit antenna directivity control technology. Background technique [0002] CDMA (Code Division Multiple Access) technology can increase user capacity and is expected to be the wireless access technology of the next generation mobile communication cellular system. However, on the receiving side of the base station, another user's signal simultaneously accessed using the same carrier causes interference, and on the receiving side of the mobile station, a signal transmitted to another user also causes interference. To remove these interferences, an array antenna is used. [0003] In an array antenna, signals are transmitted / received by mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/02H01Q1/24H01Q3/26H01Q25/00H04B7/06H04B7/08H04B7/10H04B7/26
CPCH01Q1/246H01Q3/2605H01Q25/00H04B7/0617H04B7/086H04B7/02H04W16/28
Inventor 菊地亨
Owner NEC CORP