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Method of directional reception using array antenna, and adaptive array antenna unit

An array antenna and directional reception technology, which is applied in the field of directional reception using array antennas and adaptive array antenna devices, can solve problems such as fast movement, slow movement, and difficulty in optimal tracking in the communication environment, and achieve the effect of directional transmission

Inactive Publication Date: 2004-10-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in mobile wireless communication, the moving body may be stationary, or moving slowly, or fast, and the direction of the incoming radio wave is always changing, which makes it difficult to achieve optimal tracking of the communication environment

Method used

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  • Method of directional reception using array antenna, and adaptive array antenna unit
  • Method of directional reception using array antenna, and adaptive array antenna unit
  • Method of directional reception using array antenna, and adaptive array antenna unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 is a block diagram of the adaptive array antenna device of the first embodiment.

[0041] This adaptive array antenna device multiplies signals received through a plurality of antenna elements by weighting coefficients Wi (i=1, 2, . . . , n), sums them, and outputs the resulting signals. Even if the antenna element itself has no directivity, it is possible to change the directivity by adaptively controlling the weighting coefficients. That is, it is possible to create multiple non-directional points (null points) in arbitrary directions.

[0042] For example, when the desired signal is from Figure 11 When the direction indicated by the reference numeral 701 arrives in , and the interference signal arrives from the direction indicated by the reference numeral 702, if the receiving directivity 703 points to the desired wave, the desired wave is strongly received, while the interference signal is received Weak reception, which makes it possible to improve the ...

Embodiment 2

[0072] image 3 It is a block diagram showing the configuration of main parts of the adaptive array antenna device according to the second embodiment of the present invention.

[0073] image 3 The structure of the directional receiving circuit 200 is basically the same as figure 1 The directional receiving circuit 112a in is the same, but the directional receiving circuit 200 is different in that it is provided with a coefficient distribution control circuit 201 .

[0074] The characteristic operation of the directional receiving circuit 200 will be described below.

[0075] In this embodiment, whenever the selector 117 selects the output of a diversity receiving circuit, it updates the weights and weight updating coefficients of the other two diversity receiving circuits according to the weight and weight updating coefficient of the selected diversity receiving circuit , and this selection continues.

[0076] That is to say, the weight and the weight update coefficient of ...

Embodiment 3

[0090] Figure 5 It is a block diagram showing the configuration of main parts of the adaptive array antenna device according to the third embodiment of the present invention.

[0091] The basic structure and operation of the circuit of this embodiment are the same as those of the previously described embodiments. However, in the present embodiment, two-stage control is realized by operating the function of the control circuit 300; the first control is for high-speed convergence, and the second control is for precise convergence.

[0092] A detailed explanation is given below.

[0093] First, at the start of the receiving operation, the operation control circuit 300 operates the diversity receiving circuit 115 corresponding to the weight update coefficient μ3 that converges quickly. At the same time, it terminates the operations of the remaining diversity receiving circuits 113 and 114.

[0094] The selector 116 obtains the reception quality of the output signal S3(t) of th...

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Abstract

When carrying out directive reception using an adaptive array antenna apparatus, a plurality of diversity reception circuits which differ in communication environment follow-up performance are used for reception and the reception output with the best reception quality is selected. The environment follow-up performance of the other non-selected diversity reception circuits is dynamically changed, preferably every time a selection is made by a selector based on the environment follow-up performance of a selected diversity reception circuit.

Description

technical field [0001] The invention relates to a directional receiving method using an array antenna and an adaptive array antenna device. Background technique [0002] In the field of digital wireless communication, for example, a directional antenna used in CDMA (Code Division Multiple Access, Code Division Multiple Access) is an adaptive array antenna. [0003] An adaptive array antenna is an antenna system capable of controlling the amplitude and phase of a signal received through a plurality of antennas placed at regular distances or the amplitude of a signal to be transmitted through the above antennas by adaptively controlling the communication environment in accordance with the communication environment. and phase, to change the directivity. The effect achieved in this way is, for example, to enhance the effect of eliminating interference, or to enhance the effect of selectively receiving only radio waves from a specific direction passing through a predetermined pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q3/24H01Q3/26H04B7/08
CPCH04B7/0848
Inventor 井手美奈子二木贞树平松胜彦行友英记
Owner PANASONIC CORP
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