摘要： 针对LTE-A系统中频域快速相关算法计算复杂度高、检测性能不稳定的问题，提出一种主同步信号重叠分段检测算法。通过序列循环操作延长半帧数据尾部，以保证序列的完整性。在此基础上，利用重叠分段操作降低相关复杂度，并根据门限值操作结果判断同步序列是否检测成功。仿真结果表明，该算法的计算复杂度相比频域快速相关算法减少53.85%，且对于不同的分段数，当信噪比为-7 dB时，正确检测率接近1.0，检测性能稳定。

关键词: LTE-A系统, 同步信号, 频域快速相关算法, 序列循环延迟, 重叠分段

Abstract: Aiming at the problems such as high computational complexity and instability of detection performance of the fast frequency domain correlation algorithm in LTE-A system,an primary synchronization signal overlapping segmentation detection algorithm is proposed.Through the sequence loop method,the tail of the half frame data is extended to ensure sequence integrity.On this basis,the overlapping segmentation is performed to reduce the related complexity and according to the result of threshold operation,whether the synchronization sequence is successfully detected is determined.Simulation results show that,compared with the fast frequency domain correlation algorithm,the computational complexity of the proposed algorithm is reduced by 53.85%,and for different segmentation numbers,the correct detection rate approaches 1.0 when the Signal-to-Noise Ratio(SNR) is -7 dB,which shows a stable detection performance.

Key words: LTE-A system, synchronization signal, fast frequency domain correlation algorithm, sequence loop delay, overlapping segmentation

中图分类号: 

• TN929.5