Realization of Novel Digitization Circuits in SDRs and CRs

Algorithms and circuits, following from the sampling theorem's direct, indirect, or hybrid interpretations, are equally optimal in the ideal case, but perform differently in real-world conditions. Initially, only sampling circuits based on the indirect interpretation were feasible. They are still widely used in software-defined and cognitive radios (SDRs and CRs). More advanced multichannel digitization circuits, supported by modern IC technology and based on the hybrid and direct interpretations, radically improve parameters of SDRs and CRs. The choice of correlator-like or matched-filter-like channels for these circuits depends on the specific application of SDRs and CRs as well as on available IC technology.