Quasi-synchronous CDMA system using spreading sequences with zero-correlation zone Tarciana Lopes

2006 ◽  
Author(s):  
R. Ramos ◽  
M. Geandre Rego ◽  
R. Baldini F.
Keyword(s):  
Cdma System ◽  
Zero Correlation ◽  
Zero Correlation Zone ◽  
Synchronous Cdma ◽  
Spreading Sequences

scholarly journals The Construction and Performance of a Novel Intergroup Complementary Code

2012 ◽  
Vol 241-244 ◽  
pp. 2475-2481
Author(s):  
Wen Zhun Huang ◽  
Ying Wang ◽  
Zheng Guang Zhou
Keyword(s):  
Theoretical Research ◽  
The Novel ◽  
Code Length ◽  
Zero Correlation ◽  
Zero Correlation Zone ◽  
And Performance ◽  
Orthogonal Code ◽  
Synchronous Cdma ◽  
Correlation Performance ◽  
Better Than

Based on the analyses of intergroup complementary (IGC) codes and zero correlation zone complementary codes, novel IGC codes were proposed to adapt M-ary orthogonal code spreading spectrum system or quasi-synchronous CDMA system. The theoretical research and simulation results show that the main advantages of novel IGC are that under the same code length, the number of the novel IGC code sets are more than that of the intra-group IGC codes; the length of the zero correlation zone is longer than that of the intergroup IGC codes, but shorter than that of the intergroup IGC codes between groups; and under the same code length, the auto-correlation performance of the novel IGC codes is better than that of the IGC codes and both codes are of similar cross-correlation performance.

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