Implimentation of narrowband & wideband waveform for software defined radio

Abstract

Software Defined Radio symbolizes a huge shift in the design model for radios. A major portion of the functionality is implemented through programmable signal processing devices, giving the radio the ability to change its operating parameters to accommodate new features and capabilities. SDR provides a framework by which flexible and reconfigurable devices may be developed, making it especially attractive for future multi-mode wireless communication systems. GNU Radio is a free software package. Using the USRP board in conjunction with a GPP, a RF daughterboard, and the GNU Radio software, we created a software defined radio that can transmit and receive voice and videowirelessly.Python programming language is used to write signal processing graphs which are the functional entities are written in C++ using processor floating point extensions where available. A Narrowband FM waveform is designed for wireless audio transmission and Wideband OFDM waveform is designed for wireless video transmission between the indigenously designed SDR. The project is to acquire the existing SDR technology, carry out research to overcome the existing weaknesses, provide a low-cost and ideal and a unique SDR solution for public safety communication, broadband service providers, mobile operators, law enforcing agencies, emergency responders and military.