Dr.LAL
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Dec 5, 2011
rahul sharma left a comment for Dr.LAL
"hello sir this is rahul. i am doing simulation work on opnet related to bluetooth inquiry procedure. i am new in opnet. please can you help me out..... thanks rahul my gmail ID:- rahul.sadtm@gmail.com"
Jun 18, 2010
mathew george left a comment for Dr.LAL
"Hello I was researching the possibility of using wiMAX for backhauling remote areas. I was hoping that 802.16m would meet the bandwidth requirements to provide 10-12 Mbps to customers in rural areas. This is based on the australian…"
Apr 26, 2010
K. Pushpa left a comment for Dr.LAL
"Hello Dr LAL I m new member here. Have to learn a lot in WiMAX and LTE as my research is in this area. Hope I will get good guidance from u and other erudite people here. Have a nice day Pushpa"
Apr 25, 2010
Dr.LAL posted a blog post

Right chip for the right frequency

Texas Instrument's TRFxxxx chipsets provideintegration and versatility foruse in a variety of systemconfigurations with TI and otherbaseband processors. The threeRF chipsets and their operatingfrequencies are:• TRF11xx: 2.3 to 2.7 GHz• TRF12xx: 3.3 to 3.8 GHz• TRF24xx: 4.9 to 5.9 GHzchoose one of the above which matches your frequency !See More
Apr 25, 2010
Dr.LAL left a comment for Paul John Tavera
"ok cool !"
Apr 25, 2010
Dr.LAL commented on BPT's blog post Finally WiMAX and 3G license for India
"At last !! Great article !"
Feb 26, 2010
Manish left a comment for Dr.LAL
"Hi Dr LAL, How are you? Trust my message finds you well ! I am busy with upcoming WiMAX India 2010 conference. I will share the details with you soon ! Regards, Manish Kapoor +91-9999976959 +91-9136002164"
Feb 11, 2010
Dr.LAL commented on Cpl's blog post LTE vs.WiMAX
"LTE, combining OFDM and MIMO, will provide on 2 to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users. OFDM as we all know splits the…"
Jul 2, 2009
Dr.LAL replied to Mariusz Sz.'s discussion Will LTE replace WiMAX? Does WiMAX have future?
"LTE, combining OFDM and MIMO, will provide on 2 to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users. OFDM as we all know splits the…"
Jul 2, 2009
Dr.LAL left a comment for Dr.LAL
"LTE, combining OFDM and MIMO, will provide on 2 to 5 times greater spectral efficiency than the most advanced 3G networks, reducing the cost per bit and allowing better economics for operators and end users. OFDM as we all know splits the…"
Jul 2, 2009
Dr.LAL left a comment for samira.s.ghoraishi
"Are you in dallas,TX ? could not find Netronix WIMAX products on the web..."
Apr 16, 2009
Manish left a comment for Dr.LAL
"6th WiMAX India 2009 scheduled on 21st August 2009 at Le Meridien, New Delhi - India. For more details kindly visit: http://www.bharatexhibitions.com/english/WiMAX2009.php"
Apr 16, 2009

Profile Information

Current Company
NUCENTCOM
Current Position
Sr.VICE PRESIDENT, CTO
Country of Residence
USA
City
DALLAS
With the incoming Obama administration, much focus in the US has been around the proposed $825 billion economic stimulus plan - including $6 billion for improving US broadband infrastructure. The most likely benefactors of these programs would be rural areas, where WiMAX would be a leading contender for delivering broadband services quickly and cheaply to underserved areas.

On the equipment side, Alcatel-Lucent started a Development Center in Taiwan. ZTE announced that WiMAX ForumTM certification was achieved for its 3.5Ghz WiMAX 802.16e base stations, an industry first in this band. Accton Wireless Broadband (AWB) also announced the company's full range of products had achieved M-Taiwan Wave 2 certification.

Dr.LAL's Blog

Right chip for the right frequency

Texas Instrument's TRFxxxx chipsets provide
integration and versatility for
use in a variety of system
configurations with TI and other
baseband processors. The three
RF chipsets and their operating
frequencies are:
• TRF11xx: 2.3 to 2.7 GHz
• TRF12xx: 3.3 to 3.8 GHz
• TRF24xx: 4.9 to 5.9 GHz

choose one of the above which matches your frequency !

Posted on April 25, 2010 at 5:06pm

Comment Wall (21 comments)

At 12:01am on July 23, 2008, Dr.LAL said…
The mobile network radio interface requires a sync stability of 5x10-8s. Such stability cannot currently be provided while connecting Node X via a packet switched network like WiMAX. It hence seems that synchronization can be a serious blocking factor for using WiMAX as a UTRAN backhauling system. Fortunately there are 3 candidate solutions that can overcome this issue. These are NTP, IEEE 1588 and SYNCoIP. The reference is transported over IP in ‘CE’ style. It is very QoS dependent and development is not finalized. However the required accuracy is achieved and relied on IP only and is developed from existing techniques.
For modeling traffic, coverage and capacity cannot be separated -traffic has to be considered in network planning.
Multiple knapsack- For rough capacity estimations the soft capacity feature of the WCDMA is sometimes neglected. Instead each cell is assumed to have a fixed capacity v. The capacity value can be considered an amount of Erlang that the cell can support. The set of demand points assigned to one cell can then easily be required to generate no more than v units of traffic.
∑_p▒〖A(p)yp,i≤〗 v

A single, linear constraint of the type in the above with positive co effectiveness is called a knapsack constraint- multiples are derived from them.
Receiver performance related to the sensitivity level and thermal noise (spectral density, Boltzmann constant –from statistical physics ……..receiver sensitivity level in dBm =

10log10 (e/No Rb.k.T.F/0.001(w)) = receiver_sensitity_level (dbm)+30db.
At 12:05am on July 23, 2008, Dr.LAL said…
i have listed the replies to some of the queries asked by some members of this forum -sorry i could not address it specifically to anyone specifically...hope it helps
At 12:25am on July 23, 2008, Dr.LAL said…
The Network Simulator also known as - ns-2.Ns is a discrete event simulator targeted at networking research. Ns provides substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless (local and satellite) networks.
At 12:28am on July 23, 2008, Dr.LAL said…
However my favorite is Optonet--http://www.opnet.com/
At 2:59am on July 23, 2008, madhavi said…
Hi Dr.LAL

This is Madhavi from INDIA
Nice meeting you
At 4:03am on July 23, 2008, madhavi said…
HI LAL,

Give me u r personal Mail ID.

Thanx & Regards,
Madhavi
INDIA
At 4:21am on July 23, 2008, Amony said…
hello,
Thank you for adding me as friend
At 11:02am on July 23, 2008, Jimish A. Thakkar said…
Hello Sir,
Thanks for adding me on your friend's list..
At 12:00pm on July 23, 2008, Dr.LAL said…
hello
i was designing around WiMAX components to look for low noise designs for RF transceivers. The CHIP of my interest is MAX2839. The great thing about MAxim is you can request for samples and they have excellent technical support..a great company !
At 12:22pm on July 23, 2008, umasathish said…
hi LAL

Thanks for ur message .Please keep in touch.

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