发明名称 |
Receiver for spread spectrum communication |
摘要 |
A differential detector (2) reproduces a spreading code (S2) of a received signal (S1). A digital correlator (4) calculates a correlation value between the reproduced spreading code (S2) and a reference spreading code (S3) by collating bit by bit. The timing when the correlation value exceeds a predetermined threshold value (D2) means that the reproduced spreading code (S2) and the reference spreading code (S3) match in phase. A phase of the reproduced spreading code (S2), or a phase of the received signal (S1), is discriminated at that timing. A multiplier (8) outputs a modulated signal (S6) by multiplying the received signal (S1) bit by bit in phase by a spreading code (S5) which has the same code as the reference spreading code (S3). In result, a spreading code with an accurate code sequence and phase is obtained for despreading, and theoretical process-gain is obtained.
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申请公布号 |
US5724381(A) |
申请公布日期 |
1998.03.03 |
申请号 |
US19950531341 |
申请日期 |
1995.09.20 |
申请人 |
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO;NIPPONDENSO CO., LTD. |
发明人 |
ENDO, CHISATO;YAMADA, NAOYUKI;SHIBATA, TSUTAYUKI;MIYASHITA, MASANORI;KITAZUMI, YOSHIMI |
分类号 |
H04B1/707;(IPC1-7):H04K1/00 |
主分类号 |
H04B1/707 |
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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