发明名称 |
Modem for pseudo noise communication on A.C. lines |
摘要 |
A modem which may operate as a transmitter or receiver, is provided for use on a line carrying an A.C. signal. The modem comprises a pseudorandom code generator which produces a pseudorandom code signal of a frequency an integral multiple of the A.C. signal frequency. Synchronization means synchronizes the code signal with the A.C. signal. Preferably a coherent system is provided in which a data signal involved has a bit rate an integral multiple of the A.C. signal frequency and in which a carrier generator is additionally provided to produce a carrier signal of a frequency an integral multiple of the A.C. signal frequency. In such case, the synchronization means also synchronizes the data bit and carrier signals with the A.C. signal.
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申请公布号 |
US4835517(A) |
申请公布日期 |
1989.05.30 |
申请号 |
US19840622636 |
申请日期 |
1984.06.20 |
申请人 |
THE UNIVERSITY OF BRITISH COLUMBIA |
发明人 |
VAN DER GRACHT, PETER K.;DONALDSON, ROBERT W. |
分类号 |
H04B1/707;H04B3/54 |
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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