A estimation method for the direction of incoming wave of intelligent multiple sector antenna system

A direction of arrival and smart antenna technology, applied in the field of communication, can solve problems such as inaccurate DOA estimation, achieve the effect of improving accuracy and solving grating lobe problems

Active Publication Date: 2007-04-25
SHANGHAI ULTIMATE POWER COMM TECH
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for estimating the direction of arrival, to solve the situation in the existing smart antenna system that the level of the grating lobe or the larger side lobe that occurs near the side shot direction is higher than the main lobe level, by This results in inaccurate DOA estimation, and even a technical problem that the direction of arrival of user signals estimated by DOA is opposite to the direction of arrival of actual user signals.

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  • A estimation method for the direction of incoming wave of intelligent multiple sector antenna system
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  • A estimation method for the direction of incoming wave of intelligent multiple sector antenna system

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[0032] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0033]In the prior art, the incoming wave angle of the user obtained by the spectrum estimation algorithm may be the correct estimated angle or may be due to the fact that the level of the grating lobe or the side lobe is greater than the angle of the grating lobe or the side lobe obtained by the main lobe. The core of the present invention is to first calculate the power of the user in the left and right sectors adjacent to the target sector, and then compare the power values ​​of these two sectors. If the adjacent sector has a large value, the angle of arrival of the user is the correct estimated angle. Otherwise, the angle of arrival of the user obtained by the spectrum estimation algorithm is the angle of the grating lobe or sidelobe, and it is necessary to search for the angle of arrival of the user. In the opposite area, the correct incoming wave angle of the u...

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Abstract

The invention relates to a method for evaluating incoming wave direction of multi-sector intelligent antenna system. Wherein, it comprises that (1), using spectrum evaluate method to initially evaluate the incoming wave direction of user, to obtain an incoming wave angle relative to the incoming power spectrum maximum value; (2), based on said angle, judging if user is at the edge of target sector, if it is, calculating out the powers of two sectors near the target sector; (3), if the area pointed by incoming wave angle is near the higher-power nearby sector, said angle is the final result, or else, searching the area reversed to the area pointed by incoming wave angle, to obtain the angle with maximum power spectrum in reversed area, as the final result. The invention can improve the accuracy of DOA evaluation.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for estimating the direction of arrival (DOA estimating) of a multi-sector smart antenna system. Background technique [0002] At present, the rapid growth of mobile users and the continuous improvement of wireless service requirements force the current mobile communication system to urgently solve the problem of how to further improve the system's spectrum utilization and increase the system capacity. The factors that inhibit the increase of the capacity of the wireless communication system and the continuous improvement of the transmission data rate are mainly concentrated in the following aspects: co-channel interference (CCI) caused by frequency reuse, multipath phenomenon, fading, multi-employment problem Le extension and delay extension . [0003] Traditional methods to deal with the above problems mainly include modulation and demodulation technology, channel codec tech...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08
Inventor 孙长果
Owner SHANGHAI ULTIMATE POWER COMM TECH
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