Interrelations between the coefficients of FIR digital differentiators and other FIR filters and a versatile multifunction configuration

Interrelationships between seven types of digital FIR filters, viz. the differentiators (DD), Hilbert transformers, half-band lowpass/highpass filters, bandpass/bandstop filters and frequency discriminators, have been established. It has been shown that all the aforementioned filters can be derived from the design of a DD. If we use the optimality criteria of maximal linearity of the frequency response of a differentiator, the proposed relations yield maximally flat/linear frequency responses for the remaining six filters. Similarly, an equiripple relative error design of a DD gives equiripple filters through the use of the suggested interrelations. A versatile, multipurpose, FIR configuration has also been proposed which yeilds optimal frequency response for all the seven types of digital filters. The suggested design is shown to be particularly useful for operation over the frequency ranges 0 ≤ ω ≤ 0.50π(0.5π ≤ ω ≤ π) for lowpass (highpass) filters and 0.25π ≤ ω ≤ 0.75π for the remaining ones. Mathematical formulas for computing the weights of aforementioned filters have also been derived. Possible uses of the suggested design have been given

Abstracts on Radio Direction Finding (1899 - 1995)

The files on this record represent the various databases that originally composed the CD-ROM issue of "Abstracts on Radio Direction Finding" database, which is now part of the Dudley Knox Library's Abstracts and Selected Full Text Documents on Radio Direction Finding (1899 - 1995) Collection. (See Calhoun record https://calhoun.nps.edu/handle/10945/57364 for further information on this collection and the bibliography). Due to issues of technological obsolescence preventing current and future audiences from accessing the bibliography, DKL exported and converted into the three files on this record the various databases contained in the CD-ROM. The contents of these files are: 1) RDFA_CompleteBibliography_xls.zip [RDFA_CompleteBibliography.xls: Metadata for the complete bibliography, in Excel 97-2003 Workbook format; RDFA_Glossary.xls: Glossary of terms, in Excel 97-2003 Workbookformat; RDFA_Biographies.xls: Biographies of leading figures, in Excel 97-2003 Workbook format]; 2) RDFA_CompleteBibliography_csv.zip [RDFA_CompleteBibliography.TXT: Metadata for the complete bibliography, in CSV format; RDFA_Glossary.TXT: Glossary of terms, in CSV format; RDFA_Biographies.TXT: Biographies of leading figures, in CSV format]; 3) RDFA_CompleteBibliography.pdf: A human readable display of the bibliographic data, as a means of double-checking any possible deviations due to conversion