Abstract: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.