发明名称 |
Method for generating complex quasi-orthogonal code and apparatus and method for spreading channel data using the quasi-orthogonal code in CDMA communication system |
摘要 |
A method for generating a complex quasi-orthogonal code for channel spreading in a CDMA communication system is disclosed. The method comprises generating an M-sequence having a length N and a specific sequence having a good full correlation property with the M-sequence; generating a predetermined number of other specific sequences by circularly shifting said specific sequence; generating a predetermined number of other M-sequences by circularly shifting said M-sequence, and column permutating the circularly shifted specific sequences in a same method as a column permutation method for converting the generated M-sequences to Walsh orthogonal codes to generate candidate masks; generating quasi-orthogonal code representatives by operating the candidate masks and the Walsh orthogonal codes having the same length as the mask candidates; and selecting quasi-orthogonal code candidates satisfying a partial correlation between the Walsh orthogonal codes out of the generated quasi-orthogonal code representatives and a partial correlation between different quasi-orthogonal codes, and selecting masks pertinent to generating the selected quasi-orthogonal codes.
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申请公布号 |
US6671251(B1) |
申请公布日期 |
2003.12.30 |
申请号 |
US20000480963 |
申请日期 |
2000.01.11 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM YOUNG-KY;YANG KYEONG-CHEOL;AHN JAE-MIN;KIM JAE-YOEL;KANG HEE-WON;MAENG SEUNG-JOO |
分类号 |
H04J13/04;H04B1/69;H04J11/00;H04J13/00;H04J13/02;H04L27/30;H04Q7/38;(IPC1-7):H04J11/00 |
主分类号 |
H04J13/04 |
代理机构 |
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地址 |
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