Error Control Coding and Performance Measurement for Software Defined Radios

Software Defined Radio (SDR) is a radio in which numeral physical layer functions are performed by using the software. SDR system design is a complex process. This paper examines the performance of Bit Error Rate (BER) for different signals i.e. image, video and random signals and describe the essential concept for the development of the SDR based transceiver model for QPSK and BPSK modulation scheme and analyze the performance of the proposed system in MATLAB. A graphical representation of BER v/s Signal to Noise Ratio (SNR) is obtained in presence of Additive White Gaussian Noise (AWGN) introduced in the channel. The performance of the coherent receiver is evaluated at the certain delay for QPSK modulation scheme and for multiple transmissions BER is evaluated at an instantaneous delay. The theoretical and simulated BER values are analyzed using Binary Phase-shift Keying (BPSK) modulation scheme with the coherent receiver. Finally has been concluded after achieved results that the data error can be reduced by using Grey encoding rule, and improves signal to noise ratio (SNR).