GB430330A - Improvements in and relating to systems and apparatus for wireless communication - Google Patents
Improvements in and relating to systems and apparatus for wireless communicationInfo
- Publication number
- GB430330A GB430330A GB185823A GB185823A GB430330A GB 430330 A GB430330 A GB 430330A GB 185823 A GB185823 A GB 185823A GB 185823 A GB185823 A GB 185823A GB 430330 A GB430330 A GB 430330A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- wireless communication
- carriers
- received
- tuned
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
430,330. Wireless signalling. SEYMOUR, C., and HILL, W. S., H.M. Signal School, Royal Naval Barracks, Portsmouth. Jan. 20, 1923, No. 1858. Drawings to Specification. [Class 40 (v)] For obtaining secrecy in wireless communication, signals are radiated simultaneously on two different carrier frequencies from the same or separate aerials, and each carrier is varied continuously in frequency in such a way that the difference between the carrier frequencies remains constant. At the receiver both carriers are received on an aperiodic or flatly-tuned aerial and passed to a rectifier, the output circuit of which is tuned to the constant difference or heat frequency. After amplification at this frequency, the signal is heterodyned and received in the usual manner. At the transmitter the two carriers are continuously and simultaneously varied by linked variometers or variable condensers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB185823A GB430330A (en) | 1923-01-20 | 1923-01-20 | Improvements in and relating to systems and apparatus for wireless communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB185823A GB430330A (en) | 1923-01-20 | 1923-01-20 | Improvements in and relating to systems and apparatus for wireless communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB430330A true GB430330A (en) | 1924-02-05 |
Family
ID=9729239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB185823A Expired GB430330A (en) | 1923-01-20 | 1923-01-20 | Improvements in and relating to systems and apparatus for wireless communication |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB430330A (en) |
-
1923
- 1923-01-20 GB GB185823A patent/GB430330A/en not_active Expired
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