DefinePK

Abstract

Currently, methods based on filter banks are widely used in such areas as digital signal processing, broadband communication systems, radar, image processing. There is a separate class of filter banks - hybrid filter banks, which are widely used in the construction of analog-to-digital converters with time division. The difficulty in constructing radio systems based on hybrid filter banks lies in the design of an analysis-synthesis system consisting of both analog and digital filters. This article discusses the construction procedure and structure of a broadband radio receiver based on an 8-channel hybrid filter bank with a pair structure and its calibration procedure. In existing publications, such a structure was not been previously described. Only a 4-channel hybrid filter bank with a pair structure is considered. An increase in the number of channels allows increasing the width of the processed frequency band at equal sample rates for the ADC and vice versa, expanding the dynamic range of the receiver with the same frequency band. In contrast to the classical scheme, the proposed technical solution allows the use of fewer analog filters, which in turn reduces the computational load to compensate for the imperfection of the transfer characteristic.