DRDO developed Arudhra AESA radar inducted in IAF

[tvsram1992]

we already have our asea radars

 

[amardeep mishra]

Livefist: PHOTOS: IAF Inducts Indian-built Arudhra Medium Power Radar

---------- Post added at 10:46 AM ---------- Previous post was at 10:45 AM ----------

1st indigenous Medium Power Radar inducted at Naliya in Gujarat
PTI | 07:06 PM,Jun 03,2011

Ahmedabad, Jun 3 (PTI) The first indigenously-made Medium Power Radar (MPR) `Arudhra' was today inducted at Air Force station in Naliya, Kutch, near Pakistan border, at the hands of Air Chief Marshal P V Naik. Developed by Defence Research and Development Organisation (DRDO), `Arudhra' replaces the ageing TRS-2215 and PSM-33 radars, an official release here said. The radar has a state-of-the-art technology, capable of detecting targets at ranges greater than 300 kilometres, and it is an important component in IAF plans to achieve `net centric operations', it said. The radar is being inducted to strengthen air defence capabilities in the Saurashtra-Kutch region, it added. Gujarat coastline has several economically important installations and the new radar will help in extending their security. The IAF fighters conducted a fly-past synchronised with the induction of radar by the Chief of the Air Staff. The Air Force unit in which new radar has been inducted was raised in October 1966 in Jodhpur, and it moved to Naliya in June 1988. At Naliya the unit has played a pivotal role in air defence of Saurashtra-Kutch region.

1st indigenous Medium Power Radar inducted at Naliya in Guj, IBN Live News

Man! gosh,so much mis-information! this is not the indian designed arudhra! it is israeli ELTA-2084 known as "MPR" among IAF circles!Secondly the israeli radar has an instrumented range of 460kms whereas indian arudhra has a max range of 400kms against a 2m^2 target
now this is our "indigenously designed arudhra",look how different it is from the israeli variant-
Our arudhra also features advanced DBF for the first time in india.DBF essentially means that you have got A/D converters attached to every radiating element(digital receiver) providing impressive control over every beam!

 

[Water Car Engineer]

Arudhra S-band 4-D SURVEILLANCE RADAR

Ashwini S-band 4-D SURVEILLANCE RADAR

 

[amardeep mishra]

@Oscar
To explain my point as to how exactly is this DBF is different from beam forming in analog domain(characteristic of rajendra and various other 90s era chinese/russian phased array design philosophy)-
as you can see in the picture,in ABF,you have got received echo signal(coming from every element of phased array) mixing with Rf(carrier freq).This ABF can feed upto 4 channels(pair of receiving antenna).Normally this is downconverted to IF range and subsequently digitized by our good old A/D.

Now DBF is slightly different in the sense-DBF can be realized all the way down to single element level.As you can clearly see,in DBF architecture(first time used in arudhra and ashwini radar system),every single element has got itz own A/D converter and mixing +downconverting to IF stage and subsequent digitization is carried out at individual antennae element! Noise and distortions are de-correlated by using this simple equation- y(k)=(1/N)summation(s(n)*e(n+k)) where n varies from 0 to N-1.The value of "k" or delay(for which y(k) is maximum or above a certain threshold) gives out the presence of "known" signal(target) in echo.(This technique is also employed in sonars).This operation is usually done through a matched filter that inherently maximizes SNR
This obviously is more demanding and complex vis-a-vis simpler ABF.here are some of the advantages-
(a)Enhanced controlability of multiple beams
(b)improved dynamic range
(c)better and faster power management(i.e capability to control amplitude and also phase)- this feature helps a lot in ECCM
PS- the picture below is just for reference

 

[StormShadow]

To explain my point as to how exactly is this DBF is different from beam forming in analog domain(characteristic of rajendra and various other 90s era chinese/russian phased array design philosophy)-
as you can see in the picture,in ABF,you have got received echo signal(coming from every element of phased array) mixing with Rf(carrier freq).This ABF can feed upto 4 channels(pair of receiving antenna).Normally this is downconverted to IF range and subsequently digitized by our good old A/D.

Now DBF is slightly different in the sense-DBF can be realized all the way down to single element level.As you can clearly see,in DBF architecture(first time used in arudhra and ashwini radar system),every single element has got itz own A/D converter and mixing +downconverting to IF stage and subsequent digitization is carried out at individual antennae element! Noise and distortions are de-correlated by using this simple equation- y(k)=(1/N)summation(s(t)*e(n+k)) where n varies from 0 to N-1.The value of "k" or delay(for which y(k) is maximum or above a certain threshold) gives out the presence of "known" signal(target) in echo.(This technique is also employed in sonars).This operation is usually done through a matched filter that inherently maximizes SNR
This obviously is more demanding and complex vis-a-vis simpler ABF.here are some of the advantages-
(a)Enhanced controlability of multiple beams
(b)improved dynamic range
(c)better and faster power management(i.e capability to control amplitude and also phase)- this feature helps a lot in ECCM

I'm asking you again...do you work for RCI/ASL?

 

[amardeep mishra]

@Oscar

this is how correlation is performed-
Here y(n) is the correlated output of x(n) and t(n),y(n) achieves maxima at somewhere between 50 and 60- meaning that the known signal t(n) has strong presence in unknown echo(x(n)) at roughly between n=50 and 60 - hence it also confirms the presence of target at a distance of cn/2

I'm asking you again...do you work for RCI/ASL

That is confidential,however i can say you this that i have dealt with ground based radars(rajendra at BEL to be precise) during my intern(although my specific branch is electronics and control systems) and i dont work for either RCI or ASL!i love them(signal processing aspect) more than anything else on this planet- and i am not kidding!
PS- Again,this picture below is just to elucidate the concept of correlation in digital domain and doesnt have anything to do with actual radar(either arudhra and ashwini system)

 

[StormShadow]

That is confidential,however i can say you this that i have dealt with ground based radars!i love them more than anything else on this planet- and i am not kidding!

Ok fine..but please..I have seen some "confidential info" being spilled out by you(not in this thread). That's why I was concerned.
BTW...are you aware of the new project first of it's kind in asia...whose test was also done recently...? I cannot directly mention it here but the name of the project goes by one of the characters in Ramayan.

 

[kurup]

@Oscar

this is how correlation is performed-
Here y(n) is the correlated output of x(n) and t(n),y(n) achieves maxima at somewhere between 50 and 60- meaning that the known signal t(n) has strong presence in unknown echo(x(n)) at roughly between n=50 and 60 - hence it also confirms the presence of target at a distance of cn/2



That is confidential,however i can say you this that i have dealt with ground based radars and i dont work for either RCI or ASL!i love them more than anything else on this planet- and i am not kidding!

I have read some of your posts and all of them highly informative .

I hope the details you are giving out are openly available and you are not divulging any confidential data .

 

[SQ8]

@Oscar
To explain my point as to how exactly is this DBF is different from beam forming in analog domain(characteristic of rajendra and various other 90s era chinese/russian phased array design philosophy)-
as you can see in the picture,in ABF,you have got received echo signal(coming from every element of phased array) mixing with Rf(carrier freq).This ABF can feed upto 4 channels(pair of receiving antenna).Normally this is downconverted to IF range and subsequently digitized by our good old A/D.

Now DBF is slightly different in the sense-DBF can be realized all the way down to single element level.As you can clearly see,in DBF architecture(first time used in arudhra and ashwini radar system),every single element has got itz own A/D converter and mixing +downconverting to IF stage and subsequent digitization is carried out at individual antennae element! Noise and distortions are de-correlated by using this simple equation- y(k)=(1/N)summation(s(t)*e(n+k)) where n varies from 0 to N-1.The value of "k" or delay(for which y(k) is maximum or above a certain threshold) gives out the presence of "known" signal(target) in echo.(This technique is also employed in sonars).This operation is usually done through a matched filter that inherently maximizes SNR
This obviously is more demanding and complex vis-a-vis simpler ABF.here are some of the advantages-
(a)Enhanced controlability of multiple beams
(b)improved dynamic range
(c)better and faster power management(i.e capability to control amplitude and also phase)- this feature helps a lot in ECCM

@gambit Confirmation of this

 

[Nilesh Singh]

@Oscar
To explain my point as to how exactly is this DBF is different from beam forming in analog domain(characteristic of rajendra and various other 90s era chinese/russian phased array design philosophy)-
as you can see in the picture,in ABF,you have got received echo signal(coming from every element of phased array) mixing with Rf(carrier freq).This ABF can feed upto 4 channels(pair of receiving antenna).Normally this is downconverted to IF range and subsequently digitized by our good old A/D.

Now DBF is slightly different in the sense-DBF can be realized all the way down to single element level.As you can clearly see,in DBF architecture(first time used in arudhra and ashwini radar system),every single element has got itz own A/D converter and mixing +downconverting to IF stage and subsequent digitization is carried out at individual antennae element! Noise and distortions are de-correlated by using this simple equation- y(k)=(1/N)summation(s(t)*e(n+k)) where n varies from 0 to N-1.The value of "k" or delay(for which y(k) is maximum or above a certain threshold) gives out the presence of "known" signal(target) in echo.(This technique is also employed in sonars).This operation is usually done through a matched filter that inherently maximizes SNR
This obviously is more demanding and complex vis-a-vis simpler ABF.here are some of the advantages-
(a)Enhanced controlability of multiple beams
(b)improved dynamic range
(c)better and faster power management(i.e capability to control amplitude and also phase)- this feature helps a lot in ECCM
PS- the picture below is just for reference

Sorry man!!!!!! your post is more of a bouncer to people like us............ can any one explain in plain English what he is trying to say. It looks like you work on these radar technologies but please be careful and not divulge any information which you are not supposed to.
But other than that it looks like you can provide lot of Knowledge on the forum.............

 

[ni8mare]

Sorry man!!!!!! your post is more of a bouncer to people like us............ can any one explain in plain English what he is trying to say. It looks like you work on these radar technologies but please be careful and not divulge any information which you are not supposed to.
But other than that it looks like you can provide lot of Knowledge on the forum.............

nothing is classified......DBF is tech like ABF.....

 

[Nilesh Singh]

.....DBF is tech like ABF.....[/QUOTE]

 

[greatone]

@Oscar
To explain my point as to how exactly is this DBF is different from beam forming in analog domain(characteristic of rajendra and various other 90s era chinese/russian phased array design philosophy)-
as you can see in the picture,in ABF,you have got received echo signal(coming from every element of phased array) mixing with Rf(carrier freq).This ABF can feed upto 4 channels(pair of receiving antenna).Normally this is downconverted to IF range and subsequently digitized by our good old A/D.

Now DBF is slightly different in the sense-DBF can be realized all the way down to single element level.As you can clearly see,in DBF architecture(first time used in arudhra and ashwini radar system),every single element has got itz own A/D converter and mixing +downconverting to IF stage and subsequent digitization is carried out at individual antennae element! Noise and distortions are de-correlated by using this simple equation- y(k)=(1/N)summation(s(n)*e(n+k)) where n varies from 0 to N-1.The value of "k" or delay(for which y(k) is maximum or above a certain threshold) gives out the presence of "known" signal(target) in echo.(This technique is also employed in sonars).This operation is usually done through a matched filter that inherently maximizes SNR
This obviously is more demanding and complex vis-a-vis simpler ABF.here are some of the advantages-
(a)Enhanced controlability of multiple beams
(b)improved dynamic range
(c)better and faster power management(i.e capability to control amplitude and also phase)- this feature helps a lot in ECCM
PS- the picture below is just for reference

Is there any export potential for any of our radars developed in-house ?
And if so, who might be possible buyers ?

 

[Omega007]

Is there any export potential for any of our radars developed in-house ?
And if so, who might be possible buyers ?

The Viets may be,and South American republics.

 

[Lord Of Gondor]

Is there any export potential for any of our radars developed in-house ?
And if so, who might be possible buyers ?

Indonesia has already purchased Battlefield Surveillance RADAR's(BFSR) manufactured by BEL and so did Sudan.

Bangalore, ANI -- Bharat Electronics Ltd has started exporting Battlefield Surveillance Radar (BFSR) to Indonesia and Sudan, informed company sources.

The public sector defence equipment major aims to achieve a total business of 15 million dollars this fiscal.

''We have signed a contract with Sudan for 10 radars and for Indonesia we have delivered two BFSR's,'' said Y.Gopal Rao, the Chairman of BEL.

Rao also informed that BEL had registered a total export of nine million dollars during 2003-04.

The short range BFSR is a radar developed indigenously by the Bangalore-based Electronics and Radar Development Establishment (LRDE), a DRDO unit, and manufactured by BEL.

The company bagged 5.51 billion worth order for supply of 1,176 units of BFSR (SR) for the Indian Army.

''We delivered the two BFSR to Indonesia even before we started delivering the radar to the Army,'' Rao said.

Indonesia Buy Two Battlefield Radar from Bharat Electronics - Indonesia Business News