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Self-adaptive antenna receiving apparatus adopting array atenna receiving signal

An adaptive antenna and receiving device technology, applied to antennas, wireless communication, selection devices, etc., can solve the problems of reducing diversity effect and ineffective use

Inactive Publication Date: 2003-01-08
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the diversity effect is reduced at the same time
However, since a conventional example of an adaptive antenna receiving apparatus uses different antenna weights for each subarray, there is a problem that decision error data is not effectively used in adaptive control

Method used

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  • Self-adaptive antenna receiving apparatus adopting array atenna receiving signal
  • Self-adaptive antenna receiving apparatus adopting array atenna receiving signal
  • Self-adaptive antenna receiving apparatus adopting array atenna receiving signal

Examples

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Embodiment Construction

[0051] Hereinafter, an adaptive antenna receiving apparatus according to the present invention will be described with reference to the drawings.

[0052] FIG. 3 is a block diagram showing a circuit configuration of an adaptive antenna receiving apparatus according to a first embodiment of the present invention. With reference to Fig. 3, the adaptive antenna receiving apparatus according to the first embodiment of the present invention receives CDMA (Code Division Multiple Access) signals through an array antenna having a sub-array structure, and uses adaptive weighting to form a common adaptive directivity, and diversity combining signals after forming adaptive directivity to output a demodulated signal. In this case, the adaptive weighting is controlled using one decision error signal common to all arrays.

[0053] The receiving and demodulating section of the adaptive antenna receiving apparatus according to the first embodiment of the present invention includes L (L is a p...

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Abstract

An adaptive antenna reception apparatus includes a plurality of receiving sections (1) and a combining unit (9). Each of the plurality of receiving sections (1) is provided for a corresponding one of paths. The receiving section generates a path-corresponding demodulation signal for the corresponding path and for a corresponding one of arrays of antennas from path-corresponding despread signals for the corresponding path and for the corresponding array using adaptive weights for the corresponding array. The combining unit (9) combines the path-corresponding demodulation signals over all the arrays and all the paths to generate a demodulation signal.

Description

technical field [0001] The invention relates to an adaptive antenna receiving device. More particularly, the present invention is directed to an adaptive antenna receiving apparatus which receives a CDMA (Code Division Multiple Access) signal through an antenna array and generates a demodulated signal. Background technique [0002] The CDMA system has the possibility of increasing the number of users, and is expected as a radio access system of a mobile communication cellular system. However, there is a problem that a signal from one user acts as an interfering signal from another signal from another user at the receiving end of the base station. [0003] It is already known that the adaptive array antenna receiving device is a method of receiving only desired signals and eliminating interference signals. The adaptive array antenna receiving device receives signals through multiple antennas and performs complex weighting and combining operations, controls the amplitude and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/26H04B1/707H04B7/08H04B7/10H04B7/26H04W16/28H04W88/02
CPCH04B7/0851H04B7/0885H04B1/712
Inventor 吉田尚正
Owner NEC CORP