GB2458289A - A communications transmission system that may be operated close to scanning detection systems, such as radars. - Google Patents
A communications transmission system that may be operated close to scanning detection systems, such as radars. Download PDFInfo
- Publication number
- GB2458289A GB2458289A GB0804558A GB0804558A GB2458289A GB 2458289 A GB2458289 A GB 2458289A GB 0804558 A GB0804558 A GB 0804558A GB 0804558 A GB0804558 A GB 0804558A GB 2458289 A GB2458289 A GB 2458289A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radar
- transmission system
- scanning detection
- detection system
- communication transmission
- 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.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 61
- 230000005540 biological transmission Effects 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 230000001627 detrimental effect Effects 0.000 claims abstract description 7
- 230000004044 response Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/021—Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The communication transmission system includes means (4) for detecting the transmissions of a scanning detection system (1) and for modifying the power (6) of the communication transmitter (7) to reduce the extent to which the scanning detection system (1) would otherwise suffer detrimental interference from the communications transmitter (7). The power may be reduced or transmission stopped. The scanning detection system may be radar. The communication transmitter power is modified in accordance with the radar detection system which has measured the radar signal level in allocated radar channels. The communication receiver may share an antenna with the radar receiver.
Description
ImDrovements in or relating to Communication Transmission Systems This invention relates to communication transmission systems which are liable to propagate signals that interfere with scanning detection systems and seeks to provide improved such communication transmission systems where such interference is reduced. This problem particularly arises in the circumstance of communications systems frequencies that are close to the operating frequencies of the scanning detection system.
According to this invention a communication transmission system includes means for reducing its transmitted signal strength for a period during which said transmission systems is subjected to a scanning signal from a scanning detection system such that the extent to which the scanning detection system would otherwise suffer detrimental interference from the communications system is reduced.
The means for reducing the transmitted signal strength may be such as to reduce the transmitted signal strength to zero, or substantially zero, or to a level that is sufficiently low as to reduce the detrimental interference on the scanning detection system to an acceptable level.
Generally the frequency of the communications transmission system and the scan fling detection system whilst close and even in the same band are different, but conceivably the frequencies might be the same.
Preferably, said scanning detection system is a radar.
The invention is illustrated and further described with reference to the accompanying drawings in which, Figure (a) is a schematic block diagram of one communications transmission system in accordance with the invention, the position of which is such that it is subject to scanning by a radar (1).
Figure (b) is a schematic diagram representing, against time, radar signals received by a radar signal receiver / detector (4) of figure (a).
Figure (c) schematically represents the radar (1) receive antenna gain against time.
This may be similar to, or the same as, the effect of radar transmit gain represented in (b).
Figure (d) schematically represents, against time, the communication transmission system output power, controlled by power control circuit (6) of figure (a).
Figure (e) schematically represents the communications signal, seen at, or detected in the radar (1) against time as a result of both the the communications signal (9) and the radar receive antenna gain (figure (c)) in the direction of the communications antenna (8) variation against time.
The representation in figures (b), (c), (d), and (e) are such that the time axis of each figure is aligned in time to indicate the received signal and responses.
Referring to figure (a), then a communication transmitter (7) having an antenna (8) is operated in the path of a scanning detection system (1), operating at a frequency such that the communications system is liable to cause interference to the operation of the scanning detection system, preferably a radar.
The communications system is provided with a receiver (4) to detect the radar signals received via an antenna (3), which may be physically the same antenna as (5) and I or (8), but is shown separate for ease of explanation.
The radar detection system (4) may be a channelized receiver measuring the radar signal level in allocated radar channels and the signal detected in each channels is used with the algorithms in (6) to modify the communications transmitter power output.
The receiver (4) is connected to a power control circuit (6) which is connected to control the power output of (7) in accordance with algorithms described with reference to figure (b). Figure (b) represents the time variation of the radar signal received in (4) as the radar scans.
The time varying radar signals detected by a radar detection system (4) are used by algorithms in (6) to generate the communications system output power (9) generated by (7) in accordance with the invention.
The radar detector is suitable for detecting radar signals from (1) at the appropriate level that the algorithms applied in (6) reduces the interference in (1) via any transmissions from (7).
In figure (b), the time period represented by Ti and T2 are periods when the control algorithm will reduce the communications transmitter power, as represented in figure (d), to meet the radar needs via the appropriate algorithms. During other periods, the power reduction is zero or substantially zero as represented in figure (d), in accordance with the radar needs as represented in figures (e). In figure (e) the satisfactory level' is a function of the particular radar design considered and the particular interference mechanism being countered, such as for example blocking, noise, saturation effects and may be different for different frequencies.
Communications signal can effect the radar in several ways such as blocking, saturation effects, communications noise transmissions, radar amplitude and frequency response to communications signals, all or some, resulting in communications signals effecting the radar performance.
The effects this system sets out to avoid is degradation in performance in the radar on reception due to emissions from the communications systems and the radar system receiving both in band and out of radar band signals from the communications systems, particularly the main communications signals.
The technique benefits from the reciprocal nature of the radar to communications' propagation path with the communication to radar' propagation path, and antenna gain if using the same antenna, to automatically adjust the communications transmitter to the prevailing propagating conditions. The measured radar signal in (4) allows knowledge of the current radar signal level to be used to calculate the appropriate communications transmission power.
The algorithms are those derived from standard radar power and noise requirements and are relate to the signal received at antenna (3) and receiver (4).
The algorithms are related to the need to ensure no communications transmitter signal affects the radar at (1) for frequency f1.
The algorithms are related to the need to ensure no communications transmitter signal affects the radar at (1) for frequency f2.
The algorithms are related to the requirement to ensure the modulation on the communications transmission introduces zero or substantially zero detrimental effects on communications channels.
The algorithms use the measured radar signal in (4) to determine the appropriate level for the communications transmitter power.
The radar receiver / detector (4) has a response suited to the timeliness of response needed. This is appropriate to the radar beam (gain) and the rate the beam scans.
The algorithms calculation has a response suited to the timeliness of response needed. This is appropriate to the radar beam (gain) and the rate the beam scans.
The algorithms calculation has a response suited to the timeliness of response needed. This relates to the minimisation of communications transmissions sidelobes.
The communications power modification speed is suited to the timeliness of response needed.
The communications power modification speed is suited to the sensitivity of the response needed.
There are possible variations to arrive at the correct algorithms, examples are shown below, 1. One variation is via using limited but known radar parameters, one example is as given below.
2. One variation is via field calibration using field engineers to establish using engineering measurements the correct level of permitted signal level at the radar.
3. One variation is via using only general radar parameter types" i.e. assuming the typical parameters of radar around a communication transmission system location.
4. One variation is via no information what-so-ever (an algorithm that assumes general worst condition (radar gain and power for general ATC radar and a simple radar no -nearer than' condition).
A one antenna solution (the preferred solution) If the invention uses the same antenna as the communication system transmitter (via for example a splitter device/combiner). The appropriate communications transmission power is only depends on the known parameters of the radar and the measured radar signal strength and utilises the reciprocal nature of antenna gain on transmit and receive Thus knowledge of radar transmitter power, the measured signal at the communication transmission system, the required (permitted) signal threshold level at the radar results in a defined base station power.
A two, or greater number of, antenna solution The calculation may require additional inputs of the communications transmission system antenna gain characteristics (known) to scale the algorithms.
The radar receiver (4) may be tuned for one or many scanning detection systems.
The antenna configuration may be such that (3), (5) and (8) are the same via coupling and power combiner combinations appropriate to the physical or electrical layout required by the communications system, but otherwise would be located close to each other. Claim
Claims (6)
1. A communication transmission system including means for reducing its transmitted signal strength for a period during which said transmitter is subjected to a scanning signal from a scanning detection system such that the the extent to which the scanning detection system would otherwise suffer detrimental interference is reduced.
2. A communication transmission system as claimed in claim 1 and wherein said scanning detection system is a radar.
3. A communication transmission system as claimed in any of the above claims and wherein the means for reducing the transmitted signal strength is such as to reduce the transmitter signal strength to zero.
4. A communication transmission system as claimed in claims 1 or 2 and wherein the means for reducing the transmitted signal strength is such as to reduce the transmitter signal strength to a level that is sufficiently low as to reduce the detrimental interference on the scanning detection system to anacceptable level.
5. A communication transmission system as claimed in claims 1 or 2 and wherein the means for reducing the transmitted signal strength is such as to reduce the transmitter signal strength interference on other communications systems to an acceptable level.
6. A communication transmission system substantially as herein described with reference to the attached drawings.CJ cc hc ber 51 d as-Claim1. A communication transmission system including means for reducing its transmitted signal strength for a period during which said transmitter is subjected to a scanning signal from a scanning detection system to a level that is sufficiently low as to reduce the detrimental interference on the scanning detection system to an acceptable level.2. A communication transmission system as claimed in claim I and wherein said scanning detection system is a radar.3. A communication transmission system as claimed in claims I or 2 and wherein the means for reducing the transmitted signal strength is such as to reduce the transmitter signal strength interference on other communications systems to an acceptable level.4. A communication transmission system substantially as herein described with reference to the attached drawings. * ** * * . * ** **** * * S... * S * ..* S.. * .* * . . *5. S *5 * * S * S 55 (7
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0804558.5A GB2458289B (en) | 2008-03-12 | 2008-03-12 | Improvements in or relating to communications transmission systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0804558.5A GB2458289B (en) | 2008-03-12 | 2008-03-12 | Improvements in or relating to communications transmission systems |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0804558D0 GB0804558D0 (en) | 2008-04-16 |
| GB2458289A true GB2458289A (en) | 2009-09-16 |
| GB2458289B GB2458289B (en) | 2012-07-11 |
Family
ID=39327955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0804558.5A Expired - Fee Related GB2458289B (en) | 2008-03-12 | 2008-03-12 | Improvements in or relating to communications transmission systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2458289B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10120064B2 (en) * | 2015-03-19 | 2018-11-06 | Nxp Usa, Inc. | Radar system and method with saturation detection and reset |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001237847A (en) * | 2000-02-23 | 2001-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Packet signal transmission method and packet signal transmitter in digital wireless communication system |
| JP2001237846A (en) * | 2000-02-23 | 2001-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Communication method and communication system using this method |
| US20010039183A1 (en) * | 2000-02-09 | 2001-11-08 | Tsugunao Kobayashi | Radio communication device, radio communication system and redio communication method |
| JP2002135831A (en) * | 2000-10-27 | 2002-05-10 | Nippon Telegr & Teleph Corp <Ntt> | Radio communication system |
| EP1515488A1 (en) * | 2003-09-15 | 2005-03-16 | Broadcom Corporation | Radar detection circuit for a wlan transceiver |
| JP2007088940A (en) * | 2005-09-22 | 2007-04-05 | Toshiba Corp | Cognitive communication system and cognitive communication method |
| WO2007100048A1 (en) * | 2006-03-02 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | Transmitting device, wireless communication system and transmitting method |
-
2008
- 2008-03-12 GB GB0804558.5A patent/GB2458289B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010039183A1 (en) * | 2000-02-09 | 2001-11-08 | Tsugunao Kobayashi | Radio communication device, radio communication system and redio communication method |
| JP2001237847A (en) * | 2000-02-23 | 2001-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Packet signal transmission method and packet signal transmitter in digital wireless communication system |
| JP2001237846A (en) * | 2000-02-23 | 2001-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Communication method and communication system using this method |
| JP2002135831A (en) * | 2000-10-27 | 2002-05-10 | Nippon Telegr & Teleph Corp <Ntt> | Radio communication system |
| EP1515488A1 (en) * | 2003-09-15 | 2005-03-16 | Broadcom Corporation | Radar detection circuit for a wlan transceiver |
| JP2007088940A (en) * | 2005-09-22 | 2007-04-05 | Toshiba Corp | Cognitive communication system and cognitive communication method |
| WO2007100048A1 (en) * | 2006-03-02 | 2007-09-07 | Matsushita Electric Industrial Co., Ltd. | Transmitting device, wireless communication system and transmitting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10120064B2 (en) * | 2015-03-19 | 2018-11-06 | Nxp Usa, Inc. | Radar system and method with saturation detection and reset |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0804558D0 (en) | 2008-04-16 |
| GB2458289B (en) | 2012-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1784658B1 (en) | Antenna array calibration | |
| EP2015103B1 (en) | Method for determining line-of-sight (LOS) distance between remote communications devices | |
| EP0227393B1 (en) | Radio repeater with spillover measurement | |
| Villame et al. | Carrier suppression locked loop mechanism for UHF RFID readers | |
| US8102304B2 (en) | Distance measuring equipment and distance measuring equipment monitor system | |
| EP2140282B1 (en) | Temporal cw nuller | |
| KR101828914B1 (en) | A system for reflection power dual cancellation in radar antenna | |
| GB2458289A (en) | A communications transmission system that may be operated close to scanning detection systems, such as radars. | |
| US9560541B2 (en) | Wireless transmission device, VSWR determination device, and VSWR determination method | |
| US20200341110A1 (en) | Six-port self-injection-locked radar | |
| US9891311B2 (en) | Method of secure RF ranging under strong multipath reflections | |
| KR102473459B1 (en) | Signal control apparatus having signal generator | |
| US20050181784A1 (en) | System and method for calibrating a transceiver | |
| KR101905434B1 (en) | Apparatus for measuring passive intermodulation distortion signal and method for using the same | |
| KR102473457B1 (en) | Signal control apparatus having signal analyzer | |
| KR101052023B1 (en) | Rf system of frequency of frequency modulated continuous wave radar | |
| KR19990088248A (en) | Method and apparatus to reduce transmitter overload in a transmit scanning receiver | |
| CN100512265C (en) | Gain measurement device for on-line calibration and method thereof | |
| KR102538264B1 (en) | Radar capable of Self-diagnosis and Disturbance objects detection using Proximity feedback signal and Operation method thereof | |
| AU2010200222B2 (en) | Pulse detecting equipment | |
| US20230132844A1 (en) | Determination device and determination method | |
| KR101921949B1 (en) | Super-close target sensing apparatus using uwb pulse signal and method thereof | |
| KR101832910B1 (en) | Apparatus for detecting satellite signal using arrayed filter | |
| JP2947326B2 (en) | Interference prevention device | |
| US10078130B1 (en) | Method for transmitting and receiving radar signals while blocking reception of self generated signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20190312 |