摘要
针对矿井下OFDM系统对载波频偏敏感的特点,对井下OFDM系统帧检测和载波同步两个同步过程进行了算法改进研究与硬件设计。结果表明,改进同步算法能够在不失估计范围的情况下使误差与载波间隔的比值维持在10-2以下,并能够在FPGA硬件平台实现。在矿山实验室模拟环境中,改进同步算法把频率误差范围控制在10～50kHz之间,较原算法效果提升明显,具备一定的实际意义。
In view of OFDM system for underground mine is sensitive to carrier frequency offset, the algorithms of the frame detection and carrier synchronize of underground OFDM system were improved and corresponding hardware were designed. The result showed that the improved cartier synchronization algorithm made the ratio of error and carrier spacing keep under in the case of not losing estimation range,and it could be implemented on FPGA. In the labora- tory simulation environment of coal mine,the improved car- rier synchronization algorithm could control the frequency error between 10 kHz and 50 kHz,it was better than the o- riginal algorithm,so has some practical significance.
出处
《矿业研究与开发》
CAS
北大核心
2013年第2期96-99,共4页
Mining Research and Development
基金
内蒙高教研究项目(NJZY11154)
内蒙自然科学基金(2010MS0910)
关键词
煤矿安全
OFDM
同步算法
FPGA
Safety of coal mine, OFDM, Synchronization al-gorithm, FPGA
