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�������պ����ѧѧ�� 2008, Vol. 34 Issue (10) :1126-1129    DOI:
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һ���µ�DBL-CDMA��Ƶ��
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1. �����ʵ��ѧ ��Ϣ����ѧԺ, ����100876;
2. �������ӿƼ���ѧ ISNʵ����, ����710071
New kind of DBL-CDMA spreading codes
Yang Xing1, Yu Zheng1, Li Daoben1, Deng Shuangcheng2*
1. School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
2. Xidian University State Key Lab of ISN, Xi-an 710071, China

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ժҪ ����������ĸ�����չ����,��������ͬ����(LS,Loose Synchronous)�͸�����չ������п����ڿ˻�,��Ƴ�һ�ֵ���ʵ������ֶ�ַ(DBL-CDMA,Dan Ben Lab Code Division Multiple Access)���������ַ��.�����˸õ�ַ�������غͻ��������,�Լ��õ�ַ���ʵ�ַ���.�����������,����ڻ���LS��,�ںͻ���LS���볤һ����,DBL-CDMA������ַ������������ش��ڿ�ȡ����õ��������������뻥����ĸ���.�õ�ַ�������ֵ�����غ��������ּ�Ļ����ֵ���ڼ���ʱ��ƫ�ƴ��и���.�����Ƶ�����������.
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Abstract�� A new class of dao ben lab code division multiple access (DBL-CDMA) spreading codes with zero correlation window (ZCW) was presented, which is constructed by making kronecker product of basic loose synchronous (LS) codes and special complex matrix which is constructed by Barker sequence and its phase rotation. The auto-correlation and cross-correlation function of these new codes were analyzed and some basic theorems and corollaries on these new codes were proved. In addition, the realization methods of these new codes were also discussed. Compared with the basic LS codes, the new DBL-CDMA access codes extend the minimum ZCW, increase the number of available access codes and the number of perfect complementary pair for a fixed code length. Moreover, only few side lobes of auto-correlation and cross-correlation function appear in few time shift axis in the same group. The computer simulation results verify the validity of the theoretical derivations.
Keywords�� DBL-CDMA spreading codes   LS spreading codes   kronecker product   zero correlation window     
Received 2007-09-19;
Fund:

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About author: �� ��(1980-),��,����֣����,��ʿ��,sheepstar_monkey@yahoo.com.cn.
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�� ��, �� ��, �����, ��˫��.һ���µ�DBL-CDMA��Ƶ��[J]  �������պ����ѧѧ��, 2008,V34(10): 1126-1129
Yang Xing, Yu Zheng, Li Daoben, Deng Shuangcheng.New kind of DBL-CDMA spreading codes[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(10): 1126-1129
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