Sequence detecting method and apparatus for multi-antenna system

Abstract

The invention discloses a sequence detection method for a multi-antenna system. The method comprises the steps of: calculating a space covariance matrix according to a sequence signal received by each antenna of the multi-antenna system; estimating a direction of a coming wave according to the space covariance matrix; determining a weight coefficient corresponding to the direction of the coming wave; performing the forming combination to the sequence signals received by the plurality of antennae according to the weight coefficient; and performing the sequence detection to the combined sequence signals. The invention discloses a sequence detection device for the multi-antenna system. The embodiment of the invention estimates the direction of the coming wave through calculating the space covariance matrix to determine the weight coefficient, and utilizes the weight coefficient to perform the forming combination to the received signals, which ensures that a major lobe of a directional diagram aims at the direction of the coming wave of the sequence signals, the directivity is improved, a null steering is formed at the interference direction of the coming wave, effective inhibit to noise and interference is realized, thereby the sequence detection precision is improved.

Description

Method and device for sequence detection of multi-antenna system Technical field The present invention relates to the field of wireless communication systems, and more specifically, to a sequence detection method and device suitable for multi-antenna wireless systems. Background technique In communication systems, it is often necessary to achieve sequence detection. In the TD-SCDMA system, one of the three major standards of third-generation mobile communication, there is SYNC_UL sequence detection for the establishment of uplink synchronization. TD-SCDMA system is a Synchronous CDMA system, synchronization technology is one of its important key technologies, its application can greatly reduce interference, thereby increasing system capacity. When the UE (User Equipment) performs random access, cell switching, resynchronization after out-of-synchronization, etc., the uplink synchronization establishment process must be completed. In this system, the UpPTS (uplink access time) in...

AI Technical Summary

Problems solved by technology

It can be seen that the correlation sequence obtained by calculating the signals of multiple antennas in the existing technical scheme is only a simple power summation, which does not effectively utilize the processing gain that may be brought by the reception of multiple antennas, and does not affect the noise or direction of the external environment. Therefore, there is still room for further improvement in the detection performance of the SYNC_UL sequence

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