Development and Research of a HF Range Hybrid Filter Bank Based on ARM Processor

Abstract

Currently, the electronic environment is largely determined by the use of modern radio communication systems with adaptive modes of operation, as well as the use of complex broadband signals. Monitoring a wide frequency range is used when observing various energy and spectral parameters of radio signals. The applicability of a particular signal format to the problem being solved is determined by the correspondence of these parameters to the conditions in which information is transmitted and received. The aforementioned parameters include possible interference, leading to various kinds of distortions, which, in turn, cause a deterioration in the parameters of radio monitoring systems. One of the possible methods for solving the problem of processing a wide frequency range in a difficult interference environment is the use of adaptive subband filtering based on a hybrid filter bank. The basis of the method is the decomposition of the input signal into individual frequency components (subchannels), the processing of which is performed at a speed M reduced by a factor of compared with the input signal. Further, the processed frequency components are combined into a single signal. A test of the developed filter bank was carried out on a processor with an arm core.