Signal processing method

Abstract

The invention discloses a signal processing method which comprises the following steps: the strengths of user signals with different arrival angles of a user are determined according to directional vectors of the user signals with different arrival angles of the user, a downlink forming vector corresponding to the user and directional gains of a receiving antenna at different arrival angles; and an azimuth estimation value of the user is determined according to the strengths of the user signals with different arrival angles. Another signal processing method comprises the following steps: the azimuth estimation value of the user is determined; the deviation of the azimuth estimation value of the user is estimated according to the difference between two user signal arrival angles corresponding to a given attenuation threshold; and the azimuth estimation value of the user is corrected by using the estimated deviation. The two methods provided by the invention can reduce or even eliminate the deviation between the azimuth estimation value and the true value of the user.

Description

[0001] This application is a divisional application of an application whose filing date is September 29, 2007, application number is 200710175431.1, and the title of the invention is "signal processing method". technical field [0002] The invention relates to wireless communication technology, in particular to a signal processing method. Background technique [0003] The realization of the location-based service (LBS) based on the user's location depends on the accurate estimation of the user's position. In the existing user orientation estimation method, the orientation of the user is usually estimated according to the signal strength of the user in multiple incoming wave directions of the user. The specific implementation methods include: [0004] Estimate the channel impulse response according to the signal of a certain user received by the antenna array at the base station, and calculate the downlink shaping vector; according to the calculated downlink shaping vector, ...

AI Technical Summary

Problems solved by technology

One arrival direction of the user signal is in the normal direction of the antenna, and the other arrival direction is about 90 degrees away from the normal direction. In this case, because the directivity gain close to the normal is large, and the direction away from the normal Therefore, the intensity of the two signals received by the antenna array at the base station will be very different, resulting in the final estimated user orientation being close to the normal direction and deviating from the true value

[0007] In short, in the sectoral antenna system, there is a difference in the directional gain of the antenna, so the larger the spread range of the user signal arrival angle, the greater the impact of the directional gain of the antenna on the accuracy of the estimated value of the user orientation

If the user location estimation is inaccurate, it will directly affect the realization of the LBS service based on the user location

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