MOBILE GROUND RADIO JAMMING SYSTEM FORTHE COMMUNICATION AND AIR CONTROL LINKS «LIMAN»

The mobile ground system "Liman" intends for the radio sup¬pression of the radio communication and control links and radio chan¬nels of the Identification Friend or Foe (IFF) system of the enemy.


The mobile ground system "Liman" intends for the radio sup­pression of the radio communication and control links and radio chan­nels of the Identification Friend or Foe (IFF) system of the enemy.

The objects of the system "Liman" radio countermeasure are:

  • all kinds of the VHF and UHF radio communications and guidance channels in the frequency ranges 100—150 MHz and 225—400 MHz used for the interaction of crews during air operation; for guidance of the aircrafts on air and ground targets by the air and ground control stations; for transmission of a reconnaissance data from the aircraft to the control station; for guidance of the aircrafts on ground targets by the forward air controller (FAC);
  • the communication, control and navigation channels in the frequency range 960—1215 MHz (JTIDS, TACAN types), and also channels of the state identification system (IFF).

The distinctive feature of the system is the effective radio suppression of the modern jam proof radio channels using Frequency Hopping Spread Spectrum (FHSS) mode (Link-4, Link-11 type), and FHSS in a combination with spread spectrum radio signal (Link-16). It is reached due to high speed radio reconnaissance means of the sys­tem, application of original correlation methods of the noise like radio signals detection, high power potential of the jamming signal.

The system "Liman" authentically finds out the radio channel signals of the air control station on a distance up to 450 km. After this, onboard radio means — the receivers of the information and commands — are reliably suppressed on distances up to 200 km with radiation of powerful jamming in the frequency ranges 100—150 MHz, 225—400 MHz and 960—1215 MHz.

The creation of the high power potential jamming signal based on the technology of the phased array providing the value near 15—40 kW in a low and 60 kW in a high frequency bands, that in tens times exceeds the power potential of the analogous jamming stations.

The power potential of the system "Liman" jamming station provides the radio suppression for the control chan­nels on distances when the attack aircraft cannot incjependently detect and strike the targets that provides signifi­cant decrease in efficiency of the enemy air activities.!

Maximum quantity of jammers "Liman-Ш", "Liman n2"and "Liman ПЗ" in the system structure up to 12 units (the quantity of each station type in one system can be definite by Customer) and 1 control station — the article "Liman-ПУ".

The articles "Liman-ПУ, -П1, -П2, -ПЗ" based on the truck-carrier with high cross-country ability KrAZ-6446 or KAMA3-4310 and body-van (equipped with the life support system). Use of other truck-carriers is possible.

The power supply of the articles is carried out fror i the industrial electric power-line or from the towed power gen­erator a three-phase alternating current with frequency 50 Hz, voltage 380 10% V, with grounded neutral wire.

The power consumption of the article "Liman-ПУ is no more 4 kW; of the articles "Liman-ni" and "Liman-n2" — no more 16 kW.

The mass of the articles, no more:

"Liman-ПУ, -П1 — 17000 kg (including 1500 kg — power generator);

"Liman-П2"— 17700 kg (including 1700 kg — power generator);

"Liman-ПЗ" — 17450 kg (including 1700 kg — power generator);

The dimensions of the units in a transport position no more(length width height), mm: 

the truck-carriers of the articles "Liman-ПУ, -П1 -П2, -П3“— 9100 3450 3950;

 the towed power generators — 3950 2200 2400.

 

BASIC PERFORMANCE OF SYSTEM «LIMAN»

1     Operating frequency bands for:

"Liman—П1"

100-150 MHz;

 

 

"Liman—П2"

225-400 MHz;

 

 

"Liman-П3"

960-1215 MHz

 

2    Jamming objects:

- in the frequency ranges 100-150 MHz and 225-400 MHz - all kinds of the VHF and UHF radio communications and guidance channels

used for the interaction of crews during air operation; for guidance of aircrafts on air and ground targets by air and ground control stations;

for transmission of reconnaissance data from the aircraft to the control station; for guidance of aircrafts on ground targets by forward air

controller (FAC);

 

- in frequency range 960-1215 MHz - communication, control and navigation channels (JTIDS, TACAN types), and the state identification

system channels (IFF)

 

3     Kinds of jamming signals:

 

 

1) jamming for the radio links with fixed operating frequencies (FOF) mode over the frequency 1) spot jamming signal on time and bands 100-150 MHz and 225-400 MHz                                                                                             frequency;

 

2) jamming for the radio links over the frequency bands 100-150 MHz and 225-400 MHz          2) spot jamming signal on time and using FHSS mode with minimal duration of radiation on one frequency more than           frequency

13 ms                 

 

3) jamming for the radio links over the frequency bands 100-150 MHz and 225-400 MHz          3) barrage jamming signal using FHSS mode with minimal duration of radiation on one frequency less than 13 ms             in frequency band;

 

4) jamming for the radio links over the range 960-1215 MHz using FHSS mode                       4) barrage jamming signal in

                                                                                                                                     frequency  band;                                      

 

 

4     Single jammer power potential:

"Liman-П1"

up to 15 kW

 

 

"Liman-П2"

 "Liman-П3"

up to 40 kW

up to 60 kW

 

5     Range of jamming area

up to 200 kms

 

6    Range of the air control station (ACS) and long radar detection (LRD) transmitters finding

up to 450 kms

 

7    The automatic analysis and determination o of kind and parameters of jamming signals,

f radio signals parameters, classification of radio emissions and selection of jamming objects jamming signals forming for radio networks with FOF and FHSS

 

8    Jamming signal radiation by means of transmitting phased array (PA) with automatic compensation of the nonidentical phase of a over the frequency bands 100-150 MHz, 225-400 MHz and 960-1215 MHz

 

9   Electronic scanning of the transmit ting PA antenna  pattern  maximum  over the frequency bands 100-150 MHz, 225-400 MHz and

960-1215 MHz in directions of

horizontal plane

 

 

 -30 degrees

                     0

 +30 degrees

 

10  Reaction time of the system:

- at jamming for the radio links with FHSS mode, no more

- at jamming for the radio links with FOFi mode, no more

 

0.3 ms;

0.5 s

 

11  Maximum quantity of jammers ("Liman- П1", "Liman П2" and "Liman П3") in the system structure (each station type quantity in one system can be defined on demand of the Customer)

12

 

12  Possibility of autonomous operation of the jammers "Liman П1", "Liman П2" and "Liman П3"

Present

 

SOME HISTORY FACTS





10,000

Tonnes of iron
Shot at Siege of Sebastopol during Crimean War





144,000

Revolutions per minute
Does a bullet fired from Lee Enfield rifle, as used in both world wars





2,000

Women
The Nizam of Hyderabad raised in 1975 for his war against the Marathas





130,000

Meters
Is an effective range of Big Bertha, the World War I howitzer


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State Foreign Trade Enterprise “SpetsTechnoExport” is a fully state-run entity incorporated by the Government of Ukraine in 1998 for export-import activities at foreign armaments markets.

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