电讯技术2016，Vol.56Issue(12)：1322-1326,5.DOI:10.3969/j.issn.1001-893x.2016.12.004
一种改进的GFDM时频同步算法
An Improved Timing and Frequency Synchronization Algorithm for Generalized Frequency Division Multiplexing Systems
摘要
Abstract
According to the higher requirements of generalized frequency division multiplexing ( GFDM ) system for symbol timing synchronization,a synchronization algorithm is proposed based on a new pream-ble. At the receiver,after obtaining the coarse timing synchronization,the carrier frequency offset is esti-mated through the phase difference between the two halves of the preamble. Then the carrier frequency off-set in the received signal is corrected. And a more accurate estimation of symbol timing offset is obtained by the cross-correlation with the transmitted preamble. Due to the conjugate symmetry characteristic of the preamble,this algorithm can avoid the plateau effect. In the low-latency high-reliability scenario of 5G, simulations are done in frequency-selective channels,and the performance of the scheme is evaluated in terms of mean squared error( MSE) of the frequency and time offset estimation. Theoretical analysis and simulation results show that the new algorithm has a better timing synchronization performance and can re-duce the complexity of the system,thus enhancing the overall performance of system.关键词
广义频分复用/定时偏移/载波频偏/同步算法Key words
generalized frequency division multiplexing(GFDM)/timing offset/carrier frequency offset/synchronization algorithm分类
信息技术与安全科学引用本文复制引用
吴虹,王冲,刘兵,穆巍炜,徐锡燕,马肖旭,李欣然..一种改进的GFDM时频同步算法[J].电讯技术,2016,56(12):1322-1326,5.基金项目
国家自然科学基金资助项目(61571244) （61571244）
