[url removed, login to view] contains a basic interface to a DVB USB dongle to use as a software defined radio. I am looking for an application that monitors either 406Mhz or 1544Mhz (satelite down link)and when an epirb/PLB signal is recieved sends the HEX code of the signal to the console
an eample of a setup is at [url removed, login to view] The software will need to be in C and capable of compilation on either windows or linux.
General description of BPSK modulation and demodulation
A capture using "rtl_sdr -f 406022000 epirb.raw" can be downloaded from www.safetybeacons.co.nz/epirb.raw if you are as the application can use stdin from rtl_sdr so ther is no need to purchase any hardware
have a look at http://web.stanford.edu/class/ee179/labs/Lab2.html for an example in matlab