一种 LTE下行系统中的 TDD／FDD 帧结构快速检测方法

摘要

A fast detection method is proposed for the frame structure type of 3GPP LTE downlink systems.LTE system supports both TDD and FDD frame structures, but its receiver needs to pre-determine the type of frame structure in synchronisation steps.We propose to achieve the type determination by using the mirror characteristics of time domain in LET system in regard to primary synchronisation signals ( PSS) and secondary synchronisation signals ( SSS) .This method is able to achieve fast detection with lower computational cost while ensuring the detection performance.The proposed method can be applied in implementations of LTE and LTE Advanced receivers with good application prospects.%提出一种3GPP LTE下行系统中帧结构类型的快速检测方法。 LTE系统同时支持TDD和FDD两种帧结构，接收机在同步过程中需要预先判断是哪种帧结构类型。提出利用LTE系统中主同步序列和辅同步序列的时域镜像特征进行帧结构类型判断，能够在保证检测性能的情况下，以较低的运算量实现快速检测。所提方法可应用于LTE及LTE Advanced系统下行接收机的实现，有很好的应用前景。