Abstract:
Project 25 is an industry wide effort to develop a standard for uniform digital twoway
radio for public safety organizations. It is the first standard of its kind, to allow
smooth scalable migration to interoperable systems. The systems being planned and
installed in P. 25 include Terrestrial trunked radio system (TETRA), Integrated Dispatch
Radio system (IDRA), Digital integrated mobile radio system (DIMRS), TETRAPOL
system, Enhanced digital access communications system (EDACS) and Frequency
hopping multiple access system (FHMA). TETRA is a high-performance mobile radio
system which has been developed primarily to provide a comprehensive radio capability
encompassing trunked, non-trunked and direct mobile-to-mobile communication with a
range of facilities including voice, circuit mode data, short data messages and packet
mode services. FHMA is primarily an advanced digital radio technique, which yields an
optimal spectral-efficient mobile radio system. The underlying communication technique
is a combination of TDMA and frequency hopping multiple access (a CDMA method).
Powerful error protection provides excellent protection against deteriorated channel
conditions, either due to low received signal power or to interference.
In this thesis, TETRA and FHMA both have been implemented in LabVIEW and
made interoperable at radio end on the P25 platform.
