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Intelligent antenna system and spread-spectrum signal receiver

A technology for smart antennas and signal transmission, applied in diversity/multi-antenna systems, transmission systems, space transmit diversity and other directions, can solve the problems of low angular resolution and performance degradation, reduce the amount of calculation, improve the angular resolution, improve the The effect of angular resolution

Active Publication Date: 2012-10-03
广东大洲信息技术有限公司
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Problems solved by technology

This results in lower angular resolution in the direction of arrival and degrades performance in the uplink and downlink directions

Method used

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  • Intelligent antenna system and spread-spectrum signal receiver
  • Intelligent antenna system and spread-spectrum signal receiver
  • Intelligent antenna system and spread-spectrum signal receiver

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Embodiment Construction

[0041] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0042] In the embodiment of the present invention, before the DOA is finally determined, the angle resolution of the DOA estimation is refined according to the obtained PDP, so that the DOA estimation with a higher resolution can be obtained. At the same time, the thinning process does not require a large amount of calculation, which reduces the amount of calculation.

[0043] image 3 It is a schematic structural diagram of a multipath searcher in a smart antenna according to an embodiment of the present invention. Such as image 3 As shown in , similar to the prior art, the multipath searcher includes multiple correlators, beamformers, PDP generators, averagers and delay selectors, since the functions of these units are the same as the corresponding units in the prior art , so their detailed description will be omitted below. Different from the pri...

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Abstract

The invention discloses an intelligent antenna system receiving and transmitting signals along a predetermined direction by using an intelligent antenna array. An intelligent antenna comprises a multipath searcher; and the multipath searcher comprises a plurality of correlators, a wave beam former, a PDP (Power Display Distribution) generator, a delay selector and a thinning processing unit, wherein the thinning processing unit is used for carrying out thinning processing on the angle resolution ratio of an estimated value of the DOA (Direction of Arrival) of candidate delay obtained from a delay selector and determining a result of the thinning processing as a final estimated value of the DOA. The invention also discloses a DOA estimation method and the thinning processing unit. An anglecorresponding to a maximum power value is directly determined as the estimated value in the prior art; and the angle resolution ratio of estimation is greatly improved through the technical scheme provided by the invention.

Description

[0001] This application is a divisional application of a Chinese patent application (application date: December 17, 2004; application number: 200480044637.5; title of invention: multipath searcher, refinement processing unit, and method for direction of arrival estimation). technical field [0002] The invention relates to a smart antenna in a spread spectrum system, in particular to a smart antenna system and a spread spectrum signal receiver. Background technique [0003] In recent years, with the development of mobile communication technology, smart antenna technology has been proposed and developed rapidly. In a smart antenna system, an array of smart antennas is used to receive and transmit signals in predetermined directions. By applying different weights to the antenna signals in the uplink direction, the signal from the target user is amplified, and the signal interference from other directions is suppressed at the same time. In the downlink direction, the weight is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04B1/7115
Inventor 奥斯卡・莫里兹魏立梅
Owner 广东大洲信息技术有限公司
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