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�������պ����ѧѧ�� 2008, Vol. 34 Issue (09) :1024-1027    DOI:
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Carrier synchronization method for digital terrestrial television system
Zhang Chao, Zhang Xiaolin, Zhang Shuai*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ �������ֵ��ӵ���㲥����ϵͳ���ұ�׼�ļ����ص��֡�ṹ,�����һ�ֻ���PN (Pseudo Noise)֡ͬ��ͷ���ز�ͬ���㷨.������֡ͷ����֮��,���ն˱��ز����ͽ���֡ͷ��һ�µ�PN����,����֡ͷ�е�ǰ�����������е���ؽ������Ƶ�ʹ��Ʋ�����Ƶ��ƫ��,�ٸ���PN��ط������λ����.���ز�ͬ�����������ڵ������ֵ���ϵͳ�е�3�ֲ�ͬ��֡ͷģʽ,���������ڵ��ز��Ͷ��ز�����ģʽ��֡�ṹ.���������۷����ͼ���,�����������ͷ���.��ͬ����������ͬ���ٶȿ졢���������ܺá��ʺ�Ӳ��ʵ�ֵ��ص�,����Ӧ�������ֵ��ӽ��ջ�Ӳ��ϵͳ��.
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Abstract�� According to the technique characteristic and frame structure of the China national standard for digital television terrestrial broadcasting system, a carrier synchronization scheme based on the pseudo noise (PN) frame header was presented. After the acquisition of PN frame header, the same PN sequence was recovered at the receiver. Based on the sub-sequence correlation result, the frequency offset was first calculated, and then the phase error was corrected according to the correlation peak. This synchronization method suits three types of PN frame header of digital television (DTV) system, and suits both single carrier and multi-carrier structure. The theory of the algorithm was given and the simulation was performed. The result shows that this method has the superiority of fast synchronization, anti-noise and simple hardware design. This synchronization scheme has been used in the DTV receiver.
Keywords�� digital television   orthogonal frequency division multiplexing   synchronization   pseudo random sequence     
Received 2007-08-16;
About author: �� ��(1978��),��,�ӱ���ɽ��,��ʿ��,z_c@ee.buaa.edu.cn.
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�ų�,������,��˧.�������ֵ���ϵͳ���ز�ͬ������[J]  �������պ����ѧѧ��, 2008,V34(09): 1024-1027
Zhang Chao, Zhang Xiaolin, Zhang Shuai.Carrier synchronization method for digital terrestrial television system[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(09): 1024-1027
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I09/1024
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