发明名称 |
Frequency shift keying system and method |
摘要 |
A frequency shift keying method which comprises the steps of transmitting N signals having different shift patterns which correspond to N code elements and whose frequency is varied in the entire allocated frequency band during one clock period, comparing N heterodyne detector outputs provided by N local signals for receiving, having each frequency shift pattern synchronized to N transmitting signals, each of said local signals having a constant frequency difference from the transmitting signals, and detecting the heterodyne detector circuit having the maximum output whereby the transmitted code element is detected and reproduced.
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申请公布号 |
US3909527(A) |
申请公布日期 |
1975.09.30 |
申请号 |
US19730398463 |
申请日期 |
1973.09.18 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
OHTA, TAKAHISA;SUGIMURA, SHIGEO |
分类号 |
H04B7/005;H04L27/10;(IPC1-7):H04B1/00;H04B7/00 |
主分类号 |
H04B7/005 |
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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