Abstract:
Software Defined Radio (SDR) technology is divided in to two platforms, a Software
Platform in which Radio Functions such as Modulation, Multiplexing. Source or
Channel Coding, Spread Spectrum techniques are implemented and a Hardware
Platform known as Universal Software Radio Peripheral (USRP) is used to transmit
the actual baseband information signal over a Physical Channel. SDRs or Cognitive
Radio provides means of limiting cross functionality, ability to reconfigure, less
hardware tweaking, flexible and inexpensive solution towards designing of Digital
Communication Systems.
The objective of this research work is to formulate a Practical Lab Manual on Software
Defined Radio of Nationals Instrument the NI USRP-2920 using Nl LabView. so that
anyone can easily familiarized themselves with it and can be used for Instructors
Illustration purposes. Apart from this Digital Modulation Techniques such as M-ary
PSK and QAM digital transceivers systems have been designed using SDR
technology. Detailed notes on how a signal is converted from bits to digital symbols
to discrete baseband samples and steps to compute constellation diagrams of various
digital modulation techniques have been explained.
Moreover, for Forward Error Correction (FEC) which helps to detect and correct errors
due to various channel impairments. Block Codes such as generalized Linear Block
Codes and for any order (m,h order) of Primitive Polynomial and Binary Primitive t-
Error Correcting Bose Chaudhuri Hocquenghem (Binary t-BCH) codes have been
designed in MATLAB.
