发明名称 |
CORRELATION DETECTORS FOR USE IN DIRECT SEQUENCE SPREAD SPECTRUM SIGNAL RECEIVER |
摘要 |
<p>CORRELATION DETECTORS FOR USE IN DIRECT SEQUENCE SPREAD SPECTRUM SIGNAL RECEIVER A plurality of transmitters synchronized to a common clock each transmit a data signal spread by a common bipolar pseudo-random code having a different assigned code sequence shift. A receiver, synchronized to the clock, discriminates the signal transmitted by a predetermined transmitter from signals transmitted by the others by generating a first bipolar pseudo-random code that is a replica of the common bipolar pseudo-random code and has a code sequence shift corresponding to that of the predetermined transmitter, and a second bipolar pseudo-random code that is a replica of the common bipolar pseudo-random code and has an unassigned code sequence shift. The difference between the first and second bipolar pseudo-random code sequences which is a trinary code sequence, is cross-correlated with the incoming signals. The cross-correlation despreads only the signal spread by the sequence having the predetermined code sequence shift. Each receiver includes a number of correlation detectors offset from each other by a fraction of a code chip together with decision circuitry to identify cross-correlation peaks for optimum synchronization. Analog and digital implementations of the correlation detectors are disclosed.</p> |
申请公布号 |
CA1232380(A) |
申请公布日期 |
1988.02.02 |
申请号 |
CA19850477227 |
申请日期 |
1985.03.22 |
申请人 |
SANGAMO WESTON, INC. |
发明人 |
ROUSE, DONALD W.;HORWITZ, LAWRENCE B. |
分类号 |
H04B1/707;H04J13/00;(IPC1-7):H04J13/00 |
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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