SDR Solution for Enhanced Quality Wider Bandwidth Communication

The chip-based implementation of transceivers paved the way for tremendous growth in software-defined radios (SDRs). Although software programming makes things reconfigurable, the limitation of hardware components cannot be avoided. These limitations translate to the problem of DC offset, local oscillator (LO) leakage and in-phase/quadrature-phase imbalance along with bandwidth limitation. This paper presents a digital intermediate-frequency-based method to expand the bandwidth of the multichannel SDR transmitter using a single LO configuration while avoiding RF imperfections. The proposed method is experimentally validated.