基于DSP的LTE同步信号频偏研究

s the LTE system is based on the OFDM technology, the next generation mobile communication systems should be able to provide many kinds of services with better performance and higher data rate. OFDM is a attractive multi-carrier scheme. Due to its high bandwidth efficiency, its robustness to multi-path interference and its easiness to equalization, OFDM is fixed as downlink modulation method for LTE system. But one of the biggest problems is the synchronization. A small deviation of frequency can lead to a sharp drop in OFDM system performance. In this paper, we introduce the generation of the primary synchronization signal and its assignment of frequency resources based on ZC sequence for TDD-LTE system. According to the characteristics of DSP, we present the entire functional requirements and design of the scheme for PSCH frequency offset estimation. Finally through the theoretical results, we analyze the frequency offset, it has certain practical significance.