Samsung Nexus S i9020a: Update to ICS 4.0.4 from 2.3.4/2.3.6 (without rooting)

Update from 2.3.4 (GTJ61)/2.3.6 (GRK39C) to 2.3.6 (GRK39F)

1. Download this file
2. Rename the downloaded file to update.zip
3. Put it update.zip you have downloaded on your sd card. 
4. Turn off your device 
5. Go to Bootloader (press&hold volume up button then press&hold power button) 
6. When in Fastboot mode navigate to Recovery using volume up/down buttons 
7. Press the power key to select Recovery 
8. If you see a warning logo, press the power button and then press volume up button then release both to go to the Main Recovery menu
9. From the menu, select Apply update from /sdcard, and choose update.zip from the list. 
10. When update is finished go back and select reboot system now. 

Update from 2.3.6 (GRK39F) to 4.0.4 (IMM76D)

1. Download this file
2. Use the above steps again to update.

*** The same procedure should work for other devices as well but the file would be different. You will have to find the right update file.

HowTo: Root HTC Droid Incredible || Android Phone

Follow the steps to get root access of a HTC droid incredible phone and install CyanogenMode Android OS using windows PC.

1. Install HTC USB Drivers on your PC. Driver can be found here.
2. Download this kit that contains adb, fastboot and other necessary scripts.
3. Connect your phone with the PC via usb cable with USB Debugging enabled in the phone. (do not select file transfer mode for the sdcard).
4. Download revolutionary from http://revolutionary.io/ and collect the Beta Key.
5. Unzip the revolutionary-x.x.zip inside the folder where adb.exe is available.
6. Run revolutionary.exe from command line.
7. Then follow the steps from here to install CyanogenMode.

Creating EPS figure in Linux

Use the following steps to create eps figure in linux. 

1. Use openoffice to draw the figure
2. Export the file as figure.pdf
3. Run $pdftops -eps figure.pdf. This will create a file figure.eps
4. Run $cat figure.eps | ps2eps > MyFigure.eps. This will fix the bounding box of the eps file.

HowTo: Build GNU RADIO with UHD

 Platform: Ubuntu Lucid 10.04/10.10

** All the following commands (in italic) are to be run at the shell.

• CMAKE: Check if CMAKE is installed (just try to execute command cmake). If not installed then do the following.
  1. Download from http://www.cmake.org/cmake/resources/software.html
  2. Unzip
  3. Goto the folder by $cd ~/cmake-X.X.X
  4. Run commands $./bootstrap; make; sudo make install
• GIT: Check if GIT is installed (just try to execute command git). If not then install it from Applications->Ubuntu Software Center
• LibUSB: If LibUSB is not installed...
  1. Download LibUSB from http://sourceforge.net/projects/libusb/.
  2. Unzip
  3. Goto the folder by $cd ~/libusb-X.X.X
  4. Run commands $./configure; make; sudo make install
• GNURADIO Pre-Requisites:

  $sudo apt-get -y install libfontconfig1-dev libxrender-dev libpulse-dev swig g++ automake autoconf libtool python-dev libfftw3-dev \

  libcppunit-dev libboost-all-dev libusb-dev fort77 sdcc sdcc-libraries \ 

  libsdl1.2-dev python-wxgtk2.8 git-core guile-1.8-dev \

  libqt4-dev python-numpy ccache python-opengl libgsl0-dev \

  python-cheetah python-lxml doxygen qt4-dev-tools \

  libqwt5-qt4-dev libqwtplot3d-qt4-dev pyqt4-dev-tools python-qwt5-qt4

• Download and Install UHD

  $git clone git://ettus.sourcerepo.com/ettus/uhd.git
  $cd ~/uhd/host/

  $mkdir build

  $cd build

  $cmake ../

  $make

  $make test

  $sudo make install

  $sudo ldconfig

• Download and Install GNURADIO

  $git clone git://gnuradio.org/gnuradio.git

  $cd ~/gnuradio

  $git branch --track next origin/next

  $git checkout next 

  $./bootstrap

  $PKG_CONFIG_PATH=~/uhd/host/build/

  $export PKG_CONFIG_PATH

  $./configure --enable-gr-uhd

  $make

  $make check

  $sudo make install

  $sudo ldconfig

• Configure USRP Support

  $sudo addgroup usrp
  $sudo usermod -G usrp -a <YOUR_USERNAME>
  $echo 'ACTION=="add", BUS=="usb", SYSFS{idVendor}=="fffe", SYSFS{idProduct}=="0002", GROUP:="usrp", MODE:="0660"' > tmpfile
  $sudo chown root.root tmpfile
  $sudo mv tmpfile /etc/udev/rules.d/10-usrp.rules
  $sudo udevadm control --reload-rules

• Configure UHD USRP2
  1. Download the latest FPGA driver and FIRMWARE from http://www.ettus.com/download
  2. Write the fpga and firmware on USRP2 SD card using usrp2_card_burner.py and usrp2_card_burner_gui.py scripts. The scripts are available at http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/repository/revisions/master/changes/host/utils/
  3. Connect SD card with USRP2 and boot USPR2. Now the USRP2 should be accessible at ip address 192.168.10.2.
  

USPR2 and Boost Problem

USRP2 requires boost package for installation. As of today (2nd June, 2011) USPR2 is supposed to work with Boost 1.36 or greater but it doesn't for 1.45. After trying several versions, I got it working with Boost 1.41.

NS3: Generate Statistical Result

By default, NS3 generates exactly same result when you run a simulation. If you want to collect statistical behavior by running the simulation multiple times, you need to avoid this default setting of NS3. One way to do this is using different seed for every simulation. Just add the following line before calling the run() method.

SeedManager::SetSeed(time(0));
Here the current system time is used as the seed which ensures that seed will be different for every simulation and hence the simulation result.

NS3: Apply a Patch to Source

Sometimes it is necessary to apply patch to update NS3 source. Use the following steps to apply patch.

• Download desired patchFile
• Open shell
• Goto ns3 root directory (cd /...path to .../ns-3***)
• run the command 'patch -p1 < /...path to ../patchFile'