CAJ | 학술논문

研究了长期演进技术(LTE)系统下行链路中的 PSS定时同步。针对传统 PSS定时同步算法将接收信号与本地 PSS 信号在时域进行匹配滤波，计算复杂度较高的问题，提出了一种分段频域相关算法。该算法将接收时域数据分段做 FFT，转换到频域进行相关检测。多径信道下仿真结果表明，选择分段间隔为512时，所提算法与传统算法相比，在保证同步性能相当的情况下，可大大降低计算复杂度(约94%)。
연구료장기연진기술(LTE)계통하행련로중적 PSS정시동보。침대전통 PSS정시동보산법장접수신호여본지 PSS 신호재시역진행필배려파，계산복잡도교고적문제，제출료일충분단빈역상관산법。해산법장접수시역수거분단주 FFT，전환도빈역진행상관검측。다경신도하방진결과표명，선택분단간격위512시，소제산법여전통산법상비，재보증동보성능상당적정황하，가대대강저계산복잡도(약94%)。
This paper researches a Primary Synchronization Signal(PSS) timing synchronization algorithm for downlink of Long Term Evolution(LTE) system. The conventional PSS timing algorithm applies the matched filter method to received signals and the local PSS in time domain, therefore its computational complexity is large. A partition frequency domain correlation algorithm is proposed, which performs the detection by through dividing the received signal into several parts and transforming these parts to frequency domain by FFT. Simulation results under multi-path conditions show that, compared with the conventional algorithm, the proposed algorithm can get comparative performance and cut the computational complexity by about 94%with the space between two adjacent parts of 512.