HF-band radio receiver design based on digital signal processing

The fundamentals of radio receiver design have changed little over the last twenty years. The same, however, cannot be said for the technology used for implementation. The performance of both analogue and digital technology has revolutionised the way in which receiver design can be approached. In particular, the advent of low-cost analogue to- digital convertors and digital signal-processing devices has made possible, for the first time, the implementation of architectures once considered as unrealistic. The article addresses the design of an HF band receiver using commercially available technology, with the aim of producing a receiver whose performance is better than that available with current purely analogue designs and which incorporates a significant element of digital signal processing.