Jonathan Perry
| Address: | 32-G920, MIT CSAIL The Stata Center 32 Vassar Street Cambridge, MA 02139, USA |
| Phone: | (617) 758-9618 |
| Email: | yonch at mit . edu yonch at yonch . com |
I'm a Ph.D student in MIT CSAIL's Networks and Mobile Systems group, advised by Hari Balakrishnan and Devavrat Shah. I received a B.Sc. in Computer Science from Tel-Aviv University in 2003. My work is supported in part by the Claude E. Shannon Research Assistantship.
My current research focuses in rateless error correcting codes for wireless networks: Spinal Codes (w/source code) are efficient, high-performance error correction codes, especially suited for analog channels.
Teaching
Spring 2013: TA'ing 6.829 Computer Networks
Selected Publications
- J. Perry, P. Iannucci, K. Fleming, H. Balakrishnan, D, Shah, Spinal Codes, SIGCOMM 2012.
- J. Perry, H. Balakrishnan, D. Shah, Rateless Spinal Codes, HotNets 2011.
More publications
- P. Iannucci, J. Perry, H. Balakrishnan, D. Shah, No Symbol Left Behind: A Link-Layer Protocol for Rateless Codes, MobiCom 2012.
- D. Shah, J. Perry, P. Iannucci, H. Balakrishnan, De-randomizing Shannon: The Design and Analysis of a Capacity-Achieving Rateless Code, Manuscript in preparation/submission.
- P. Iannucci, K. Fleming, J. Perry, H. Balakrishnan, D. Shah, A Hardware Spinal Decoder, ANCS 2012.
libwireless and wireless-python
The wireless package contains components for physical- and link-layer simulation of wireless systems, with an emphasis on error correction codes. It was developed as part of spinal code research. Components include:
- Error correcting codes: spinal codes, raptor, LT, LDPC, strider, turbo.
- Mappers/Demappers: linear mapping, gray mapping.
- Channels: AWGN, BSC, MIMO, model of Rayleigh channel.
- Packet generators: random, random+CRC.
- Statistics collection: BER (Bit Error Rate), PER (Packet Error Rate).
- Simulation loop ready for parallel execution, supports rateless codes.
- Efficient database (based on Berkeley DB) to collect experiment results.
Installing ns-2 on Ubuntu 12.04
Recent Ubuntu releases contain many of the prerequisites for ns-2, which can relieve much of ns-2's installation burden. This post works out the details of such an installation, compiling ns "from all the pieces", as specified in the ns-2 documentation.
The TclCL crunch
Whereas it may seem that all important dependencies can be fetched from apt repositories, the tclcl library binary lacks support for uint64_t (at least in the 12.04 repositories tested at the time of writing), so it should be compiled from source. Another quirk is that the tclcl library has a config.h that interferes with ns's config.h, so removing it (after tclcl binaries had been compiled) is needed for successful ns compilation. Note that even if 'make install' is called for tclcl, the config.h file gets installed and needs to be removed, so there is no particular advantage to calling 'make install'.
The following sections detail the procedure.