GB644076A - Improvements in or relating to diversity signal receivers - Google Patents
Improvements in or relating to diversity signal receiversInfo
- Publication number
- GB644076A GB644076A GB28513/47A GB2851347A GB644076A GB 644076 A GB644076 A GB 644076A GB 28513/47 A GB28513/47 A GB 28513/47A GB 2851347 A GB2851347 A GB 2851347A GB 644076 A GB644076 A GB 644076A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valves
- channel
- signals
- proportional
- potentials
- 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
- H04B7/0837—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 pre-detection combining
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
Abstract
644,076. Radio receiving systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 24, 1947,. No. 28513. [Class 40 (v)] In a diversity receiver having three or more signal channels, potentials proportional to the signal strength are derived from the signals in each channel and combined differentially with a potential derived from the signals and proportional to the strongest signal, the resultant signals being used to control a trigger circuit having the same number of stable states as there are channels, and which controls transmission means in each channel so that only the strongest signal channel is used for reception. Radio, intermediate frequency or low frequency signals from each of the channels A, B and C are passed to detector units AD, BD and CD respectively, so that potentials proportional to the peak signal strengths are produced across the rectifier loads AD4, BD4, CD4. Rectifiers AD6, BD6 and CD6 are associated with a common load ABC2, ABC3, across which is developed a potential proportional to the strongest signal. These potentials are combined in opposition, the resulting potential, which is positive, or in the case of the strongest signal, zero, being fed respectively to the control grids of cathode follower valves V4, V5 and V6. The outputs from the cathodes of valves V4, V5 and V6 are applied to the control grids of valves V1, V2 and V3. The grids of each of the valves V1, V2 and V3 is connected to the anodes of the other two valves, so that this arrangement forms a trigger circuit having three states of equilibrium in which two valves are conducting and one is cut-off. The anodes of valves V1, V2, and V3 are connected respectively to gating circuits A3, B3, C3, the arrangement being such that signals are passed to the common output circuit from one channel only, at any one time. The differential potentials, by controlling the operation of the trigger circuit, ensure that the output is taken from the strongest signal channel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB274395X | 1947-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB644076A true GB644076A (en) | 1950-10-04 |
Family
ID=10259615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28513/47A Expired GB644076A (en) | 1947-10-24 | 1947-10-24 | Improvements in or relating to diversity signal receivers |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH274395A (en) |
| FR (1) | FR963499A (en) |
| GB (1) | GB644076A (en) |
-
0
- FR FR963499D patent/FR963499A/fr not_active Expired
-
1947
- 1947-10-24 GB GB28513/47A patent/GB644076A/en not_active Expired
-
1948
- 1948-03-20 CH CH274395D patent/CH274395A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH274395A (en) | 1951-03-31 |
| FR963499A (en) | 1950-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2497859A (en) | Frequency diversity telegraph system | |
| US2951152A (en) | Radio diversity receiving system | |
| GB635590A (en) | Radio receiving systems | |
| US2975275A (en) | Combining system for diversity communication systems | |
| US3045114A (en) | Diversity combining system | |
| GB646051A (en) | Improvements in or relating to electric pulse code modulation systems of communication | |
| GB799127A (en) | Diversity receiving combining radio system | |
| GB815457A (en) | Improvements in or relating to diversity radio receiving systems | |
| US3383599A (en) | Multiple superheterodyne diversity receiver employing negative feedback | |
| GB671143A (en) | Improvements in or relating to radio diversity receiving system | |
| GB644076A (en) | Improvements in or relating to diversity signal receivers | |
| GB612161A (en) | Improvements in or relating to radio communication systems | |
| US3059189A (en) | Stereophonic detecting and matrixing circuit | |
| GB1065473A (en) | Diversity receiver system | |
| GB590209A (en) | Improvements in or relating to radio receivers operating with diversity reception | |
| GB1286757A (en) | Predetection signal processing system | |
| US2503957A (en) | Diversity receiver system | |
| US2514162A (en) | Diversity reception | |
| GB1346623A (en) | Diversity combining arrangements | |
| GB885527A (en) | Diversity combiner control system | |
| GB1051619A (en) | ||
| GB715438A (en) | Improvements in or relating to radio telegraph diversity receiving systems | |
| SU552710A1 (en) | Device for adaptive phase correction | |
| GB656295A (en) | ||
| GB577247A (en) | Improvements in diversity reception of frequency modulated signals |