GB1289547A - - Google Patents
Info
- Publication number
- GB1289547A GB1289547A GB1289547DA GB1289547A GB 1289547 A GB1289547 A GB 1289547A GB 1289547D A GB1289547D A GB 1289547DA GB 1289547 A GB1289547 A GB 1289547A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- output
- detector
- channel
- amplifier
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/325—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of coded signals, e.g. P.S.K. signals
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
1289547 Radar THOMSON CSF 3 Dec 1969 [6 Dec 1968] 59118/69 Heading H4D A radar system has means for transmitting a noise signal and means for combining echo signals with a replica of the transmitted signal, wherein the combined signal is applied to a detector whose output frequency is range dependent and wherein the output is applied to a multichannel network whereby target range information is obtained at the output of at least one channel. Echo signals are added in adder 5 to part of the signal from noise transmitter 3 after changing to I.F. and amplification. After further amplification the composite signal is passed to an m channel network 7 each channel comprising a bandpass amplifier 7i and a square-law detector 8i. The outputs of the detectors are averaged together and the average value is subtracted from each individual detector output in differential amplifiers 9i. The outputs from these are sequentially applied to a weighted amplifier 10 by switch 9. The signal applied to amplifier 10 is a sinusoid whose frequency is a function of the target range. After mixing the signal is applied to a network 13 having n frequency selective channels each comprising a bandpass filter 13j, a linear detector 14j and an integrator 15j. The target range is determined by which channels produce an output. The networks 13 and 7 may be replaced by spectrum analysers.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR176949 | 1968-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1289547A true GB1289547A (en) | 1972-09-20 |
Family
ID=8657932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1289547D Expired GB1289547A (en) | 1968-12-06 | 1969-12-03 |
Country Status (4)
| Country | Link |
|---|---|
| FR (1) | FR1603493A (en) |
| GB (1) | GB1289547A (en) |
| NL (1) | NL6918277A (en) |
| SE (1) | SE370284B (en) |
-
1968
- 1968-12-06 FR FR1603493D patent/FR1603493A/fr not_active Expired
-
1969
- 1969-12-03 GB GB1289547D patent/GB1289547A/en not_active Expired
- 1969-12-04 NL NL6918277A patent/NL6918277A/xx unknown
- 1969-12-05 SE SE1681569A patent/SE370284B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR1603493A (en) | 1971-04-19 |
| DE1961197B2 (en) | 1972-09-07 |
| DE1961197A1 (en) | 1970-06-11 |
| SE370284B (en) | 1974-10-07 |
| NL6918277A (en) | 1970-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |