发明名称 |
Device and method for generating spreading code and spreading channel signals using spreading code in a CDMA communication system |
摘要 |
A spreading code generating device for a Code Division Multiple Access (CDMA) communication system. The device comprises a PN (Pseudorandom Noise) code sequence generator for generating PNi and PNq sequences; an orthogonal code generator for generating first and second orthogonal codes which perform Differential Phase Shift Keying (DPSK) state transitions at intervals of at least two chips; and a spreading code generator for generating spreading codes Ci and Cq by mixing the PNi and PNq code sequences with the first and second orthogonal codes such that a present phase of the spreading codes Ci and Cq alternately makes Quadrature Phase Shift Keying (QPSK) and DPSK state transitions with respect to a previous phase of the spreading codes Ci and Cq.
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申请公布号 |
US6490267(B1) |
申请公布日期 |
2002.12.03 |
申请号 |
US19990407537 |
申请日期 |
1999.09.29 |
申请人 |
SAMSUNG ELECTRONICS, CO., LTD. |
发明人 |
KIM JE-WOO;WOO JUNG-HYO;PARK CHANG-SOO;AHN JAE-MIN |
分类号 |
H04B1/69;H04B1/707;H04J11/00;H04J13/00;H04J13/10;H04J13/12;(IPC1-7):H04B7/216 |
主分类号 |
H04B1/69 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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