Study of carrier synchronization technology of CMMB

 HU Zhao-peng^1,2,3, HUA Yu^1,3, HUANG Chang-jiang^1,2,3, GAO Yuan-yuan^1,3

1. National Time Service Center, Chinese Academy of Sciences, Xi′an 710600, China;

2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;

3. Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi′an 710600

Abstract: An algorithm for the integer frequency offset and fraction frequency offset estimation, which is important in the carrier synchronization technology for CMMB(China mobile multimedia broadcasting), is studied by using the correlation of the pseudorandom sequence in CMMB signal, so as to lay a foundation for the following work of navigation/ranging. Simulation results show that the algorithm is of higher accuracy and is feasible.

Key words: carrier synchronization; integer frequency offset; fraction frequency offset