GB619846A - Improvements in and relating to signal transmission systems employing radio links - Google Patents
Improvements in and relating to signal transmission systems employing radio linksInfo
- Publication number
- GB619846A GB619846A GB2343647A GB2343647A GB619846A GB 619846 A GB619846 A GB 619846A GB 2343647 A GB2343647 A GB 2343647A GB 2343647 A GB2343647 A GB 2343647A GB 619846 A GB619846 A GB 619846A
- Authority
- GB
- United Kingdom
- Prior art keywords
- band
- inverted
- frequency
- derived
- signal
- 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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2603—Arrangements for wireless physical layer control
- H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Radio Relay Systems (AREA)
Abstract
619,846. Radio signalling. GENERAL ELECTRIC CO., Ltd., and ESPLEY, D. C. April 15, 1946, No. 23436/47. Divided out of 619,772. Drawings to Specification. [Class 40 (v)] In a radio link repeating system of the general kind described in Specification 619,772, one or more of the repeating or receiving stations is or are arranged to invert the frequencies of the derived signal band before amplification, whilst others amplify the band in its uninverted form. The inverted and the uninverted versions of the signal preferably occupy identical frequency ranges, so that identical amplifiers can be used throughout the system. That part of the distortion of an amplifier which is a function of frequency is compensated by using inverted and uninverted signal bands at alternate stations. The derived signal band may be a lower sideband resulting from modulating the original signal on a sub-carrier, or an upper side-band, or a band comprising the whole of one sideband and a portion of the other. Transmission from station to station may be effected by modulation of the derived band on a shortwave carrier and radiation of one side band. If the lower side-band is radiated, it represents the derived band in inverted frequency order, and by mixing it at the receiving or repeating station with a local short-wave, this inverted band may be reduced in frequency so that it lies within the desired frequency limits. The Provisional Specification of 449,322 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1148146A GB619772A (en) | 1946-04-15 | 1946-04-15 | Improvements in and relating to signal transmission systems employing radio links |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB619846A true GB619846A (en) | 1949-03-15 |
Family
ID=9987051
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2343647A Expired GB619846A (en) | 1946-04-15 | 1946-04-15 | Improvements in and relating to signal transmission systems employing radio links |
| GB1148146A Expired GB619772A (en) | 1946-04-15 | 1946-04-15 | Improvements in and relating to signal transmission systems employing radio links |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1148146A Expired GB619772A (en) | 1946-04-15 | 1946-04-15 | Improvements in and relating to signal transmission systems employing radio links |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB619846A (en) |
-
1946
- 1946-04-15 GB GB2343647A patent/GB619846A/en not_active Expired
- 1946-04-15 GB GB1148146A patent/GB619772A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB619772A (en) | 1949-03-15 |
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