Posts Mentioning RSS Toggle Comment Threads | Keyboard Shortcuts

  • A T M 8:12 PM on July 22, 2008 Permalink | Reply
    Tags:   

    ebook rescue act 

    Am in the process of reviving the abandoned work.Thanks for encouraging words from many of you. I received calls and messages from far-off places to finish the book. It’s a nice feeling.

    I had a re look at the document. It looks I can rescue. Whether this work is going to see the light of the day or not, am going to get it to some shape.
    When I was working on it earlier, I used to work in bursts;working on almost all the chapters simultaneously. This time I have split the big document into 15 smaller chapter documents. Will take one at a time.

    Please pour your thoughts and comments as and when I finish and post the chapters. Thanks again.

     
    • Jnaneshwara 8:59 PM on July 22, 2008 Permalink

      Hi Aru,

      Nice to know about your decision..

      All the best for your plans…

  • A T M 5:19 PM on July 13, 2008 Permalink | Reply
    Tags: ,   

    My unfinished, unpublished book on wireless communication 

    This was my ‘underground’ project for two years. To publish a non-technically-technical book.

    It was about simplifying the understanding of wireless communication. Ever since I started working, I used to look for books which would compliment and possibly enhance understanding of my work at office and things around in general. I felt there was a gap. We solved heaps and heaps of Fourier equations in text book. At work place we were reading just functional spec and design spec.  We juggled with Maxwell’s wave equations for semester exams, but in our every day life, we don’t seem to understand, how a simple Radio works.

    After searching for couple of years, I figured out those books which are already out there on wireless topics, are either written by a professor  or a research scholar at a university or an expert in communication theory, people “who knew little too much”. There were hardly any books written with the intention of filling the gap I mentioned.

    Most of the books were fairly technical in nature, written in extremely difficult language for a beginner. It is still fine, but they had very few illustrations. Needless to say, a book on wireless communication (a highly invisible subject) is incomplete if it does not paint reader’s imagination. Those which had, had Diagrams; those in tight geometrical shapes.

    One evening, I happened to be there at Ankit Fadia’s book launch in Oxford Book store at Leela Palace. He is a young genius, security expert, etc etc. When I flipped through the pages that day, I said “Crap. If a book can be made out of this content, then I think I can deliver better”. Even you can. This prompted me.

    I knew exactly how it should look when the book is finished. Fairly compact, easy in English, broad overview of the topic, hand-drawn illustrations and so forth. My language was OK. I needed to study more to keep it technically accurate. I wanted to do illustration by myself, but my sketching skills were not so great. ( I thought it is difficult to find an illustrator, who could understand a technical subject).

    Ancient Times

    Electromagnetic Spectrum

    I worked incessantly for two years. I bought every possible book available in stores about the topic. ( Just to see what is that I hate about that book). Made tons of notes. Surfed like maniac. Revived my school time drawing traits.

    Some days, I worked on it morning till evening, sacrificed several weekends. Also kept my notebook by the bedside. Sadly there were also days, I gave up completely, sometimes for weeks. It was difficult to imagine myself as an author. A publisher would really be interested ?? I don’t have a Ph.d or any history of publishing in IEEE journals. Some uncertainty.

    I set personal milestones, to complete it within a year. By the year end it was in a good shape. But was still not ready to go to a publisher. I said “another six months”. Even after Six months, it still looked the same. There is so much more to do. I took yet another six months. I still saw it as “unfinished”. Meanwhile, my frustration grew and went out of the roof. If you ask me, it would have never looked finished, even after it would have hit the stands. I simply gave it up a year ago.

    Just around the time when I was thinking of discontinuing the project, I approached Tata Mc-Grawhill. Just to see if I get some sort of a encouragement. They were not keen.

    I finally kept that in a folder and forgot about it. Yesterday, nearly after an year, I felt this work should be unearthed. Even if am not going to work on it, let it benefit and possibly inspire some one out there. I am sharing this ebook in pdf format. It is in ‘as it is’ format when I left it. Half-done, Unfinished.

    Feel free to download and share with any one else.

    Almost Everyones guide to Wireless communication (2 MB )

    Almost everyone\'s guide to wireless communication - eBook

    If you think it deserves some pat, I have a paypal account.

    Thanks

     
    • Jnaneshwara 12:56 AM on July 17, 2008 Permalink

      Hi Aru,
      Nice to know regarding Unfinished Book.
      As i have interacted with you since many years,I know about you. By this time this book must have been published.But I can understand it could not become possible may be due to work load at office / some other reason…No worries you have published e-book..” Hope we all can see in Printed Book as soon as possible”… Nice to know that you are sharing your Technical knowledge with all of us which has come along with your professional life/ lot of reading.. All the best for your Writing & to you…

    • admin 7:00 PM on July 27, 2008 Permalink

      I did not know that there’s a big ‘fan’ following of Ankit Fadia. Look here. Hehe
      http://www.ankurb.info/2007/12/05/ankit-fadia-certified-ethical-idiot/

    • Adarsh 8:33 AM on August 5, 2008 Permalink

      Nettu,

      You know what.. I never knew this side of yours. I am so thrilled to read the book. You should keep me as the motivation factor man. I am a layman when it comes to telecom technology, but I can understand English. Despite my curiosity in tehcnology, my MBA and my current job didnt let me understand stuff like this. I was searching for just this kind of a book all my life. keep writing and dont worry on publishing and selling it. I do sales :-)

      great work. finsih it and i will be the first one to read it , understand technology as shown by you.

    • A T M 6:57 AM on August 10, 2008 Permalink

      Thanks a ton for your words Salesman. Keeping a day job is stretching into nights as well. No Progress in writing for two weeks now.

  • A T M 11:23 AM on July 30, 2007 Permalink | Reply  

    Google bidding for wireless spectrum 

    I am presenting this topic tomorrow at office. Here’s a quick primer of the story behind the news.

    What is so unusual about this news?

    Google is a search company and spectrum is normally bought by Telcos.
    That’s why this news is worth a look.

    So why is google doing this ?

    Google is just expressing an interest in the bid, provided the spectrum sellers impose certain restrictions on the potential bid winners.
    Spectrum auction is few months away and the officials are drafting rules for the auction.

    So, google is proposing that the winner of the spectrum should open up his network.

    What do you mean by “opening up the network ” ?

    Consumer who is going to buy the service from the operator, should be able to
    - Pick up any handset he wants (iPhone is available only with AT&T)
    - Download ringtones, games and any other software including skype,etc from any vendor

    Sounds a modest request ?
    Not so, for the incumbent operators.
    Things are tight locked at the moment.
    Consumer can’t make a free choice of the handset and services from different operators.

    Why should it be so ?

    When you buy a new laptop, the seller of the laptop does not obligates me to install WinXp or RedHat,
    He does not tell me whether I should use google talk or Y! messenger.

    This is what google is asking.

    What will google gain out of this ?

    Opening up of a network allows new entrants for the auction.
    You will have more operators to choose from.
    Accessing wireless internet will get cheaper
    You will use Google services!

    Do you see something more ?

     
    • Anonymous 1:52 PM on May 15, 2008 Permalink

      Sounds good.Will it happen

  • A T M 6:10 AM on April 11, 2007 Permalink | Reply  

    TDM and FDM 

    If you happen to read any primer books on wireless systems, opening chapters of those will describeTime Divison Duplex(TDD) systems and Frequency Division Duplex systems (FDD).
    All fine. Very easy to understand. But there’s a problem if they leave it at just that point.
    Reader might be led to believe that TDM is better than FDM and CDM is better than TDM and so on…

    In reality, there exists no pure Time Division Multiplexed or Frequency Division Multiplexed systems.
    TDMA systems (our GSM systems) are a mix of TDD and FDD.
    In GSM, you are given a chunk of bandwidth to use.First you divide them into several different frequencies (FDD) and on each particualr frequency you will give a slice of time for different users(TDD).

     
  • A T M 1:08 PM on March 5, 2007 Permalink | Reply  

    Evolution of WLAN 802.11 standard 

    Evolution of WLAN standards.
    I wonder why didn’t they choose to name it this way: a to b to g ?
    802.11a -> 802.11b -> 802.11g
     
  • A T M 10:11 AM on March 2, 2007 Permalink | Reply  

    Scientists in the communication world 

    We were suggesting names for our conference rooms. Here is what we came up with. Names of scientists in the communication world.

    Some Historical figures and their contribution.

    Marconi – dedicated himself to the expansion of wireless telegraphy

    Bell – “Mr. Watson, come here, I want you”.

    Hertz – Hertz discovered electromagnetic waves

    Shannon – the father of information theory”

    Maxwell – Interrelationship between electric fields, magnetic fields, electric charge, and electric current.

    Nyquist – engineer who developed theories of noise, system stability, and telegraph signalling

    Shockley – invented the transistor

    Baudot – dedicated his life to the development of a fast-printing telegraph. Baud Rate.

    Morse – inventor of the electromagnetic recording telegraph

     
  • A T M 9:23 AM on February 28, 2007 Permalink | Reply  

    WiMax Vs EVDO 

    There will be lot of news around wimax this year and in coming years.
    It will be competing with faster 3G solutions like EVDO and HSDPA.
    Here’s a comparison of WiMax ( which they call it as 4G) with EVDO ( 3G)

    Check this article too.

    What is the ground reality ? You will have to wait for another two years to see how the market will play and what consumer really wants. If upgrade to faster 3G solutions deliver comparable performance to Wimax, at a reasonable cost, 3G technologies will survive.

     
  • A T M 12:02 PM on February 16, 2007 Permalink | Reply  

    All-IP Networks 

    All-IP networks is the in thing in wireless infrastructure networks. If you look for more information in the web, most of the documents talk only about what All-IP networks is all about.

    What they don’t tell is, what was the world like before it was all IP.

    I hit upon this article after a lot of search.

    Some excerpts here.

    An IP wireless network would replace the old SS7 (Signaling System 7) telecommunications protocol, a task that many believe to be long overdue. “The SS7 network is massively redundent,” says Kempf. That’s because SS7 signal transmission uses a heartbeat that consumes a large part of the network bandwidth even when there is no signaling traffic. IP networks use other less bandwidth-expensive mechanisms to achieve reliability”

    “IP tolerates a variety of radio protocols. It lets you design a core network that gives you complete flexibility as to what the access network is,” observes Kempf. “You could be a core network provider that supports many different access technologies, 802.11, WCDMA, Bluetooth, HyperLAN, and some that we haven’t even invented yet, such as some new CDMA protocols.” An all IP network’s technology tolerance means unimpeded innovation all around. “The core [IP] network can evolve independently from the access network. That’s the key for using all IP,” says Kempf.

    With IP, you basically get rid of the lock-in between the core networking protocol and the link layer, the radio protocol

     
  • A T M 8:59 AM on January 27, 2007 Permalink | Reply  

    Huttadalli Hutta 

    My first ever theatrical experience in my adulthood. Went to Ranga Shankara, yesterday evening to watch this kannada play Huttadalli Hutta ( Ant-hill within an Ant-hill ) written by TP Kailasam.

    Why I was keen on watching the play ?….I was curious about the delivery of the dialogue by the artists. Are they going to use a wireless microphone, or few standing mikes ?

    To my surprise, they do not use any. They speak little louder and hence probably I noticed that the hall was not a bigger one. It’s just big enough to be audible for the last row audience. Theatre Plays are are quite a pull among the audience. Tickets were sold out and the house was full.

    The plot of the play is simple. It is that of a couple who exploit the innocent through the several tricks they play.

    I been little detached from kannada literature and havent read much in a long while. Wanted to pick up this “Samagra Sanna Kathegalu”, but was in two minds…if am really so keen on it. Want to badly revive my taste for reading… but ..but but…

     
    • Anonymous 4:04 PM on January 31, 2007 Permalink

      hey Ranga Shankara is a lovely place to go .. I watched ” Witness to the Prosecution” by Agatha Christie .. it was too cool!

  • A T M 1:51 PM on January 25, 2007 Permalink | Reply  

    Mobile IP Protocol 

    To understand the function of Mobile IP, a great analogy to use is the Postal Service.

    1. Postal mail is sent to you by placing a letter (the packet payload) in an envelope addressed to you (IP header).

    2. The letter arrives at your local post office and is routed to you at your Home Address, as shown in Fig.

    3. When you move, you tell the local post office (Home Agent) to forward packets to your new location (Care-of Address [CoA]). Now, when a letter addressed to your Home Address arrives at your local post office, it can now be readdressed (tunneled) to your new location (CoA).

    4.The letter then arrives at the post office that services your new location (Foreign Agent [FA]) and is delivered to you at your new location (CoA), as shown in Fig. This mail delivery is done with no effort by the original sender of the letter.
     
Get Adobe Flash playerPlugin by wpburn.com wordpress themes
c
compose new post
j
next post/next comment
k
previous post/previous comment
r
reply
e
edit
o
show/hide comments
t
go to top
l
go to login
h
show/hide help
esc
cancel