Method and apparatus for acquiring circulating prefix-length information

循环前缀长度信息的获取方法及装置

Abstract

本发明公开了一种循环前缀长度信息的获取方法,首先根据接收数据序列,获取同步信道的符号位置;然后根据所述同步信道的符号位置以及预知信息,估算不同循环前缀长度下、具有相关性的两列参考符号的差分相关值;最后比较上述各个差分相关值,最大差分相关值对应的循环前缀长度为真。上述循环前缀长度的获取方法完全可以在同步信道SCH粗同步之后实现,不影响其后的精同步,因此完全适用于现有LTE TDD系统的小区初搜过程。
The method comprises: based on the received data sequence, getting the symbol location of synchronous channel; according to the symbol location and the foreknowledge information of the symbol locationof the synchronous channel, estimating the differential correlation values of two reference symbol columns being in different cyclic prefix lengths and having correlation; comparing said each deferential correlation value, and taking the cyclic prefix length correlative to the maximum different correlation value as true. Said method can be realized after the rough synchronization of the synchronous channel and has no influence on the fine synchronization.

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