发明名称 |
Transmitter/receiver system |
摘要 |
A transmitter/receiver system for converting digital information into a multi-frequency signal for transmission. A reference frequency signal is first transmitted, then a series of frequencies having information indicative of differences with the reference signal are transmitted, and a receiver discriminates differences with the reference frequency signal to decode the information.
|
申请公布号 |
US4660215(A) |
申请公布日期 |
1987.04.21 |
申请号 |
US19840678032 |
申请日期 |
1984.12.04 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
HORIIKE, YOSHIO;NAGAISHI, YASUO;FUKUI, KIYOTAKE |
分类号 |
H04L27/26;(IPC1-7):H03M7/00 |
主分类号 |
H04L27/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|