FPGA implementation of simple digital signal processor

Field-programmable gate arrays (FPGAs) allow rapid prototyping, which results in fast time to market. Unfortunately, even they cannot free the designer of hard and time-consuming development of digital hardware. This task can be simplified by moving some computations from dedicated hardware to a processor, thus raising the design process to a higher level of abstraction. In recent years such trend has also been noticeable in the design of FPGA based systems for digital signal processing. In this paper, we consider FPGA implementation of a digital signal processor that is optimized for calculation of the inner product of complex vectors. The processor allows simple cascading. It is suitable for processing of blocks of data, for example in software defined radio.