摘要
OFDM(正交频分复用)作为一种高效的数据传输技术,具有良好的抗衰落能力,应用前景非常广阔,但是OFDM对同步偏差非常敏感,同步偏差的产生会使OFDM系统性能大大降低。在Schmidl&Cox算法的基础上,通过改进训练符号结构和频偏判决函数来完成频偏估计,给出了具体的改进算法,并对改进算法进行了仿真分析。结果表明,在相同条件下改进算法相对Schmidl&Cox算法提高了载波频偏估计的精度。
OFDM（orthogonal frequency division multiplexing） as an efficient data transmission technology has good anti-fading capability and it has bright prospects.However,OFDM is very sensitive to synchronization error.Synchronization error of the produce will greatly reduce the OFDM system performance.Based on the Schmidl Cox algorithm structure and by improving the training symbols to complete the offset decision frequency estimation function,the improved algorithm is given in detail,and it is analyzed by simulation algorithm.The results show that the improved algorithm under the same conditions,in comparison with Schmidl Cox algorithm,improves the accuracy of carrier frequency offset estimation.
出处
《北京联合大学学报》
CAS
2010年第3期38-41,共4页
Journal of Beijing Union University
基金
"211工程"三期建设项目(S-09102)
关键词
正交频分复用
频偏估计
同步算法
训练符号
OFDM
frequency offset estimation
synchronization algorithm
training symbol
