Welcome to our 4G and Wireless Industry Forum

Connecting over 10,000 4G Engineers Around the World!

Ask technical questions, find answers to common questions, and learn about 4G engineering developments.

  • Male
  • United States
Share on Facebook

Dr.LAL's Friends

  • rahul sharma
  • mathew george
  • Mohan Palla
  • K. Pushpa
  • Parisa Askarnejad
  • deepak kumar sharma
  • John W. Bates
  • Manish
  • solara
  • Akshaye
  • Paul John Tavera
  • david
  • Sairusi Naivaluwaqa
  • Venugopal

Gifts Received


Dr.LAL has not received any gifts yet

Give a Gift


My Page

Latest Activity

madhavi left a comment for Dr.LAL
"Hi LAL, This is Madhavi. Give me some new or innovative Ideas about charging system side or end user side for my Project.Use full to both sides network operator and end user.I am expecting soon result. Demo Version I have to submit next…"
Apr 11, 2014

Profile Information

Current Company
Current Position
Country of Residence
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…

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

Give me u r personal Mail ID.

Thanx & Regards,
At 4:21am on July 23, 2008, Amony said…
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…
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.

You need to be a member of 4G360 to add comments!

Join 4G360


4G360 Sponsor

Latest Activity

M.Sabri left a comment for Ahmad S. M. Saqer
Apr 21
Michael Wolleben posted a page
Dec 3, 2015
Mind Commerce's discussion was featured
Dec 2, 2015
rakesh srivastava updated their profile
Nov 29, 2015

4G360 Training Sponsor


© 2016   Created by Michael Wolleben.   Powered by

Badges  |  Report an Issue  |  Terms of Service