Multi-antenna channel estimation method and device as well as corresponding base station system

Abstract

The invention discloses a multi-antenna channel estimation method and a device as well as a base station system. The method comprises the following steps: A, carrying out initial channel estimation on each antenna of a communication system; B, determining the directional channel estimation result of jointed multi-antennae; C, transforming and decomposing the directional channel estimation result to obtain the channel estimation results of each antenna. The device comprises an initial channel estimation module, a directional channel estimation module and a directional channel estimation result transformation module, which are used for carrying out each step of the above method. The base station system comprises the device. By using the invention, signals of multiple antennae can be jointed to carry out channel estimation, thus better suppressing noise and interference and proving more precise channel estimation performance.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to designing a channel estimation method and device in a mobile communication system and a corresponding base station system. Background technique [0002] At present, in most communication systems, in order to improve the transmission reliability, it is necessary to obtain the channel impulse response passed through the signal transmission process, that is, channel estimation. For example, in a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system, in order to realize joint detection, beamforming and some measurement procedures, the channel estimation process is essential. [0003] Current channel estimation methods mainly include blind channel estimation methods and methods for channel estimation by sending training sequences. Since the calculation amount of the blind channel estimation method is very large, and the estimation result is often not accurate eno...

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Problems solved by technology

[0013] In the existing channel estimation method, each antenna is estimated independently, and the suppression of noise and interference is not considered, especially the suppression of co-channel interference from external cells. Therefore, the existing channel estimation method does not have co-channel interference and noise It has better performance under lower conditions, but in the case of co-channel interference or relatively large noise, the ability to resist noise and interference is relatively weak, especially the process of formula (2) has a deteriorating effect on noise, It leads to serious deterioration of channel estimation results, and finally leads to serious deterioration of system performance

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