GB715430A - Improvements in diversity-reception radio systems - Google Patents
Improvements in diversity-reception radio systemsInfo
- Publication number
- GB715430A GB715430A GB1901752A GB1901752A GB715430A GB 715430 A GB715430 A GB 715430A GB 1901752 A GB1901752 A GB 1901752A GB 1901752 A GB1901752 A GB 1901752A GB 715430 A GB715430 A GB 715430A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diversity
- signal
- channel signal
- tetrode
- triode
- 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
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
- H04B7/082—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection selecting best antenna path
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
Abstract
715,430. Radio receiving systems. PLESSEY, CO., Ltd. July 23, 1953 [July 28, 1952], No. 19017/52. Class 40 (5) In a diversity .reception system, volume compression means, preferably following a logarithmic law, are provided in each signal channel in advance of the signal comparator which controls the diversity switch. In the embodiment described, the channel signal from input A is applied i to a volume compressor comprising resistance 1 and rectifiers 2, 3, the output from which is amplified in triode 4, and tetrode 12, which acts as a limiter, and thence passes to the common output coupling condenser 41. The channel signal from input B is fed to volume compressor 14, 15, 16, triode 17, tetrode 25 and thence to condenser 41. The diversity switch comprises a bistable trigger pair 27, 28 the anodes of which are connected to the screen grids of tetrodes 12, 25 respectively, so that only one of these is operative depending on the state of the trigger circuit. The latter is controlled by the opposed outputs of channel signal rectifiers 7, 20, fed from valves 4, 17, respectively. The rectified signals are developed in the resistors 9, 22 connected in series between the grid of valve 27 and earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1901752A GB715430A (en) | 1952-07-28 | 1952-07-28 | Improvements in diversity-reception radio systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1901752A GB715430A (en) | 1952-07-28 | 1952-07-28 | Improvements in diversity-reception radio systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB715430A true GB715430A (en) | 1954-09-15 |
Family
ID=10122374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1901752A Expired GB715430A (en) | 1952-07-28 | 1952-07-28 | Improvements in diversity-reception radio systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB715430A (en) |
-
1952
- 1952-07-28 GB GB1901752A patent/GB715430A/en not_active Expired
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