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1. 中国科学院上海高等研究院,上海 201210
2. 中国科学院大学,北京 100049
3. 上海科技大学信息科学与技术学院,上海 201210
[ "唐杰(1992-),男,四川南充人,中国科学院大学博士生,主要研究方向为无线系统中的同步技术、MIMO传输技术等。" ]
[ "王芳(1978-),女,山东烟台人,博士,中国科学院上海高等研究院高级工程师,主要研究方向为信道编解码、物理层算法等。" ]
[ "李明齐(1971-),男,江西南昌人,博士,中国科学院上海高等研究院研究员,主要研究方向为无线“三网融合”、基于GPP的软件无线电等。" ]
网络出版日期:2017-08,
纸质出版日期:2017-08-25
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唐杰, 王芳, 李明齐. DVB-T2系统基于前导符号的同步算法[J]. 通信学报, 2017,38(8):94-100.
Jie TANG, Fang WANG, Ming-qi LI. Synchronization based on preamble symbol for DVB-T2 system[J]. Journal on communications, 2017, 38(8): 94-100.
唐杰, 王芳, 李明齐. DVB-T2系统基于前导符号的同步算法[J]. 通信学报, 2017,38(8):94-100. DOI: 10.11959/j.issn.1000-436x.2017167.
Jie TANG, Fang WANG, Ming-qi LI. Synchronization based on preamble symbol for DVB-T2 system[J]. Journal on communications, 2017, 38(8): 94-100. DOI: 10.11959/j.issn.1000-436x.2017167.
DVB-T2(digita1 video broadcasting-second generation terrestria1)系统采用一种具有C-A-B特殊结构的前导符号用于时频同步。目前,已有的基于前导符号的同步算法仅利用其中 C-A 与 B-A 之间的相关性来实现时频同步,而忽略了A内部的共轭对称性。基于该共轭对称性质,提出一种新的镜像乘积同步算法,用于实现前导符号的检测与时频同步。通过在AWGN(addictive white Gaussian noise)信道和TU6(typica1 urban)信道30 km/h移动速度下对所提算法进行蒙特卡洛仿真,并与已有同步算法相比较,结果表明所提算法的检测概率明显提高,时域同步和频域同步的均方误差均明显降低。
DVB-T2(digita1 video broadcasting-second generation terrestria1)system adopted a preamb1e,with a specia1 C-A-B structure,to accomp1ish time-frequency synchronization.A11 existing preamb1e based synchronization a1gorithms on1y uti1ized the corre1ation between C and A or B and A,neg1ecting the conjugate symmetry character within A.By using this character,a new synchronization method was proposed to make detection probabi1ity higher and synchronization error sma11er.Monto Car1o simu1ations were carried out in AWGN(addictive white Gaussian noise)channe1 and TU6(typica1 urban)channe1 with ve1ocity of 30 km/h.Compared with existing synchronization methods,both higher detection probabi1ity and sma11er mean square error in time-frequency synchronization is achieved.
ETSI Digital video broadcasting(DVB); frame structure,channel coding and modulation for a second generation terrestrial television broadcasting System(DVB-T2) [S ] . EN 302 755 V1.1.1 , 2009 .
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ETSI Digital video broadcasting(DVB); implementation guide for a second generation digital terrestrial television broadcasting system(DVB-T2) [S ] . TS 102 831 V1.2.1. , 2012
DOBLADO J G , BAENA V , ORIA A C , et al . Coarse time synchronisation for DVB-T2 [J ] . Electronic Letters , 2010 , 46 ( 11 ): 797 - 799 .
VIEBMANN A , WAADT A , SPIEGEL C , et al . Implementation-friendly synchronization for DVB-T2 [J ] . Electronic Letters , 2010 , 46 ( 4 ): 282 - 283 .
ROTOLONI M , TOMASIN S , VANGELISTA L . Maximum likelihood estimation of time and carrier frequency offset for DVB-T2 [J ] . IEEE Transactions on Broadcasting , 2012 , 58 ( 1 ): 77 - 86 .
ZHANG X , LIU J , LI H , et al . Maxmum likelihood synchronization for DVB-T2 in unknown fading channels [J ] . IEEE Transactions on Broadcasting , 2015 , 61 ( 4 ): 615 - 624 .
ROTOLONI M , TOMASIN S , VANGELISTA L . On correction-based synchronization for DVB-T2 [J ] . IEEE Communications Letters , 2010 , 14 ( 3 ): 248 - 250 .
CAZALENS S , LESTHIEVENT G , ROS B , et al . Theoretical study of P1 detection(synchronisation for DVB-T2 standard) [C ] // 36th Int Conf Telecommun Signal Process(TSP) . 2013 : 249 - 253 .
ZHANG X , BIE H , LEI C , et al . A robust timing and frequency synchronization scheme for DVB-T2 System [C ] // 2015 IEEE 81st Vehicular Technology Conference(VTC Spring) . 2015 : 1 - 6 .
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