Abstract:
Software radio is an emerging technology, thought to build flexible radio systems,
multiuser, multistandard, multiband, reconfigurable and reprogrammable by software.
In fact the term software radio stands for the radio functionalities defined by software,
meaning the possibility to define by software the typical functionality of a radio,
usually implemented in transmitter and receiver equipment by dedicated hardware.
The presence of software defining the radio necessarily implies the use of DSPs to
replace dedicated hardware, to execute, in real time, the necessary software.
Software radio will provide the means to realize signal processing tasks of
communication transceiver by means of software .The replacement of ASIC
technology with DSP technology opens the road to new horizons. Software
implementation of baseband functions such as coding, modulation, equalization and
pulse shaping.
An approach towards this project required adequate knowledge of Digital Signal
Processing and Digital Communications to implement the communication functions
in software . We have designed a complete all digital communication transceiver in
Matlab which is capable of the modulation, pulse shaping, phase synchronization,
timing synchronization, equalization, channel coding etc. The wireless channel effects
like multipath delay spread and mobility are created in software and the performance
of the transceiver is evaluated for such channel.
