Special issue on increasing flexibility in wireless software defined radio systems

After making constant significant advancements in the field of Wireless Software Defined Radios (SDRs), it is now clear that the related technologies are maturing. It is well known that SDRs are inherently flexible by nature. Still, there is a constant push for efforts to keep increasing the flexibility of Wireless Software Defined Radios. This need for increase in flexibility is not just limited to radios in the civil market but also in the tactical market due to increase in coalition forces working together in sensitive areas of the world. Among various ways to increase this flexibility, some of them are using open standards and architectures, improved techniques in digital signal processing and development of more efficient embedded systems. Thus, this Special Issue of the Springer Journal of Signal Processing Systems focuses on the before mentioned areas of advanced SDRs technologies which help in building more efficient and flexible SDRs.