摘要
同步是OFDM系统的关键技术之一,在介绍OFDM系统结构的基础上,围绕OFDM的同步问题,根据SC算法的原理,提出了OFDM同步的方案,并给出了帧同步、频偏同步和FFT的DSP实现方法。通过实验系统的中频对接测试,测试结果表明利用不同时间间隔的2个训练符号2的相关性,系统能够较好地实现不同频偏估计范围的同步,该测试方案为系统在无线信道中进行同步测试提供数据依据。
The synchronization is one of the key technologies for OFDM system, so the structure of OFDM system is introduced around the OFDM synchronization problem. According to the principle of SC algorithm, the OFDM synchronization scheme is proposed and the implementation of the frame synchronization, the frequency offset synchronization and FFT algorithm based on DSP are introduced. By IF docking testing of the experimental system, the test results show that using the correlation of two training symbols 2 with different time intervals, the system can achieve a better synchronization with range of different frequency offset estimation. In addition, the data basis for synchronization testing of the system in the wireless channel is provided in this test program.
出处
《电视技术》
北大核心
2012年第7期4-6,11,共4页
Video Engineering
基金
陕西省教育厅自然科学基金项目(09JK382)
