发明名称 |
MODEM FOR PSEUDO NOISE COMMUNICATION ON A.C. LINES |
摘要 |
<p>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.</p> |
申请公布号 |
CA1226914(A) |
申请公布日期 |
1987.09.15 |
申请号 |
CA19840446149 |
申请日期 |
1984.01.26 |
申请人 |
UNIVERSITY OF BRITISH COLUMBIA (THE) |
发明人 |
VAN DER GRACHT, PETER K.;DONALDSON, ROBERT W. |
分类号 |
H04B1/707;H04B3/54;(IPC1-7):H04B3/54 |
主分类号 |
H04B1/707 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|