Method and device of estimating space arrival direction

Abstract

The present invention discloses an estimation method and device of space arrival direction used in wireless communication system which applies the technique of intelligent antenna; an up-link time slot M and a renewal cycle T included in the calibration cycle are set; a time slot comprises one or more than one renewal cycle T; when the DOA estimation of space arrival direction is started, the counting unit calculates the up-link time slot in the calibration cycle and the renewal cycle in every up-link time slot; the calculation is carried out by a controller, based on the above calculating value, in the first renewal cycle of the first time slot of every calibration cycle, activating the searching machine of maximum power value to work out the DOA calibration value which is considered as the primary value or calibration value of DOA calibration; in other time of the calibration cycle, activating the arbiter of optimal demodulation signal to work out the DOA calibration value, realizing the follow of the DOA calibration value; the selector of DOA output value chooses the final DOA calibration value. The invention can lessen the complicated matrix manipulation, providing a much precise DOA calibration value.

Description

technical field [0001] The present invention relates to a method and device for receiving and transmitting using an array antenna in a wireless communication system, in particular to a method and device for path detection and direction-of-arrival estimation. Background technique [0002] In order to reduce multipath and multiple access interference more effectively, reduce adjacent cell interference, and improve system capacity, smart antenna technology is adopted in the third-generation wireless communication technology, especially in the TD-SCDMA third-generation wireless communication technology standard Smart antenna technology is one of its key technologies. The technical advantages brought by the adoption of smart antennas include reducing inter-cell interference, reducing multipath interference, reducing transmit power, improving receiving sensitivity, increasing system capacity and cell radius, and increasing the signal-to-noise ratio based on each user. [0003] In...

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Problems solved by technology

Although the principle of this method is simple and easy to implement, it has the following disadvantages: each search requires complex matrix operations, and the amount of calculation is large; because it is based on calculating DOA once per time slot, the DOA estimated value obtained by this method is used There is not a small deviation in the downlink beamforming (especially in the case of high-speed mobile UE), which needs to be corrected in the downlink (the publication number is CN 1700801A, and the name is "A Downlink in a Smart Antenna System for Mobile Communications") The technology disclosed in the Chinese patent of Beamforming Method), which increases the complexity of smart antenna algorithm processing

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