Multi-cell Synchronization with Interference Mitigation Sequences

• Main Authors: Peng, Sheng-Yuan, 彭聖元
• Other Authors: Tsai, Shang-Ho
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/72075828877184815252

碩士 === 國立交通大學 === 電信工程研究所 === 101 === In a macro/femtocell overlay network, multi-cell interference (MCI) would make synchronization more difficult than that in conventional single-cell environments. Therefore how to reduce the MCI is crucial. In this research we propose a set of synchronization sequences which have not only good autocorrelation property but also more robust to the MCI. Our simulation results show that the MCI is sufficiently mitigated by applying the proposed synchronization sequences as well as the cell detection performance is improved. Moreover, since OFDM system is sensitive to the carrier frequency offset (CFO), CFO estimation and compensation is also important in multi-cell scenario. Simulation results depict that, with the proposal CFO estimation method, our propose sequences have significantly better CFO detection accuracy than the primary sequence used in LTE standard.