Packet Collisions in 802.15.4 Networks

Simulation code for the analysis of concurrent transmission in IEEE 802.15.4 wireless networks. This is the accompanying code to the technical report available at ArXiv; the full paper appeared in IEEE Transactions on Wireless Communications 13(12) (On the Reception of Concurrent Transmissions in Wireless Sensor Networks).

##Directories

• src: Python code for calculating the demodulator output of the receiver
• julia: re-implementation in Julia using @parallel, awesomely faster
• figs: matplotlib code used to generate some of the figures in the paper, to see how to use phitau.py
• collision-viz: re-implementation of the simulation code in JavaScript and the visualization applet code

###Dependencies ####Python For the src/figs part, you need

• numpy/scipy
• matplotlib installation that supports TeX output (see the matplotlib help page)

####Julia For julia, you need

• a recent development version (v0.4) of Julia (from github)
• package NPZ (to read and write numpy data files)
• PyPlot (to call matplotlib from julia)

Run it like this to enable parallel execution on worker threads:

$ julia --depwarn=no -O -p [n_CPUs] gen_ser_contour.jl unif soft

###Example Outputs ####BER Contour Plot Plot of the bit error rate that a sender experiences when time or phase offsets are present.

####MSK Waveform Plot An example waveform of the physical signal when the sender employs the minimum shift keying modulation.