JPS6486638A - Frequency hopping radio communication system - Google Patents
Frequency hopping radio communication systemInfo
- Publication number
- JPS6486638A JPS6486638A JP62242831A JP24283187A JPS6486638A JP S6486638 A JPS6486638 A JP S6486638A JP 62242831 A JP62242831 A JP 62242831A JP 24283187 A JP24283187 A JP 24283187A JP S6486638 A JPS6486638 A JP S6486638A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- reception
- signal
- frequency hopping
- converted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To realize bidirectional communication by the frequency hopping system in one and same frequency band with a simple constitution by selecting a local oscillation frequency higher than the reception frequency and applying frequency conversion to a low intermediate frequency in the reception system. CONSTITUTION:A reception signal received by an antenna 10 in the reception system is separated by an isolator 11 from a transmission signal and given to a frequency converter 15 via a receiver 4, frequency-converted by a local oscillation frequency fL2 higher than the reception signal and converted into fi+FM in the intermediate frequency the same as that of the transmission system. The converted IF signal is inversely spread by the same frequency hopping synthesizer output fN as that of the transmission system to obtain a demodulation signal fi and original information is demodulated by a demodulator 3. Thus, the bidirectional communication by the frequency hopping system is realized in the same frequency band with the simple constitution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242831A JPS6486638A (en) | 1987-09-29 | 1987-09-29 | Frequency hopping radio communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242831A JPS6486638A (en) | 1987-09-29 | 1987-09-29 | Frequency hopping radio communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6486638A true JPS6486638A (en) | 1989-03-31 |
Family
ID=17094939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62242831A Pending JPS6486638A (en) | 1987-09-29 | 1987-09-29 | Frequency hopping radio communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6486638A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5099495A (en) * | 1989-03-24 | 1992-03-24 | Nobuo Mikoshiba | Spread spectrum communication device |
JPH08181680A (en) * | 1994-12-27 | 1996-07-12 | Nec Corp | Code division multiple access communication method |
JPH09214404A (en) * | 1995-11-29 | 1997-08-15 | Nec Corp | Spread spectrum communication method and device |
-
1987
- 1987-09-29 JP JP62242831A patent/JPS6486638A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5099495A (en) * | 1989-03-24 | 1992-03-24 | Nobuo Mikoshiba | Spread spectrum communication device |
JPH08181680A (en) * | 1994-12-27 | 1996-07-12 | Nec Corp | Code division multiple access communication method |
JPH09214404A (en) * | 1995-11-29 | 1997-08-15 | Nec Corp | Spread spectrum communication method and device |
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