Signal Processing Devices
Transistors are cheap and getting cheaper. This key observation has made SDR a reality. A true SDR has to implement at least some of the physical layer functionality in software. For the purpose of this chapter the definition is expanded to include software-controlled radios. Flexible and programmable digital signal processing can be implemented on a wide range of devices. This chapter provides an overview of the different types of devices suitable for implementing the DSP portion of an SDR.