发明名称 |
Spread spectrum communication system |
摘要 |
Co-channel interference may be prevented even if data having different transmission rates are concurrently multiplied to a same frequency band width with a different spreading factors. A method for generating code division multiple access data from data having different rates by a direct spread spectrum includes the steps of combining an orthogonal code and a reversed orthogonal code obtained by inverting the orthogonal code, for each of orthogonal code sequence structured by an m-sequence thereby to generate a first sequence of orthogonal codes, combing two of the orthogonal code for each of orthogonal code sequences structured by the m-sequence thereby to generate a second sequence of orthogonal codes, combining two of the reversed orthogonal code for each of orthogonal code sequences structured by the m-sequence thereby to generate a third sequence of orthogonal codes, and generating another orthogonal code having twice a code length of the orthogonal code from the first, second and third sequence of orthogonal codes; and multiplying the generated orthogonal code and a different m-sequence, together.
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申请公布号 |
US6041034(A) |
申请公布日期 |
2000.03.21 |
申请号 |
US19970940479 |
申请日期 |
1997.09.30 |
申请人 |
FUJITSU LIMITED |
发明人 |
FUKUMASA, HIDENOBU;OISHI, YASUYUKI;NAGATANI, KAZUO;HAMADA, HAJIME |
分类号 |
H04B1/69;H04B7/26;H04J11/00;H04J13/00;(IPC1-7):H04B7/216;H04B7/212;H04B1/38 |
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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