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    Wyświetlanie 1-7 z 7
    Tytuł:
    Pipelined division of signed numbers with the use of residue arithmetic for small number range with the programmable gate array
    Autorzy:
    Smyk, R.
    Ulman, Z.
    Czyżak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/376378.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    pipelining
    residue number system
    RNS
    residue arithmetic
    Opis:
    In this work an architecture of the pipelined signed residue divider for the small number range is presented. Its operation is based on reciprocal calculation and multiplication by the dividend. The divisor in the signed binary form is used to compute the approximated reciprocal in the residue form by the table look-up. In order to limit the look-up table address an algoritm based on segmentation of the divisor into two segments is used. The approximate reciprocal transformed to residue representation with the proper sign is stored in look-up tables. During operation it is multiplied by the dividend in the residue form and subsequently scaled. The pipelined realization of the divider in the FPGA environment is also shown.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 76; 117-126
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Residue number system (RNS)
    Autorzy:
    Sharoun, A. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/376029.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    residue number system
    RNS
    residue arithmetic
    Opis:
    In the residue number system, a set of moduli which are independent of each other is given. An integer is represented by the residue of each modulus and the arithmetic operations are based on the residues individually. The arithmetic operations based on residue number system can be performed on various moduli independently to avoid the carry in addition, subtraction and multiplication, which is usually time consuming. However, the comparison and division are more complicated and the fraction number computation is immatured. Due to this, a residue number system is not yet popular in general-purpose computers, though it is extremely useful for digital-signal-processing applications. This thesis deals with the design, simulation and microcontroller implementation of some (residue number system based) building blocks for applications in the field of digital signal processing. The building blocks which have been studied are binary to residue converter, residue to binary converter, residue adder and residue multiplier.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 76; 265-270
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scaled residue reverse converter for signed numbers with low cost moduli base
    Autorzy:
    Czyżak, Maciej
    Smyk, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/376503.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    residue number system
    residue reverse conversion
    scaling
    low-cost moduli
    Opis:
    The paper presents a realization of the scaled residue reverse converter for the low cost moduli base {2n -1,2n ,2n+1} . The moduli of this type allow for the memoryless reverse conversion using the Chinese Remainder Theorem because the orthogonal projections can be obtained by shifts and additions. Moreover, the modulo reduction of the sum of projections and sign detection algorithms are shown. Also the converter architecture is presented.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2019, 98; 101-114
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scaling of numbers in residue arithmetic with the flexible selection of scaling factor
    Autorzy:
    Ulman, Z.
    Czyżak, M.
    Smyk, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/376813.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    scaling technique
    scaling factor
    residue arithmetic
    Residue Number System
    RNS
    Mixed-Radix System
    MRS
    Opis:
    A scaling technique of numbers in residue arithmetic with the flexible selection of the scaling factor is presented. The required scaling factor can be selected from the set of moduli products of the Residue Number System (RNS) base. By permutation of moduli of the number system base it is possible to create many auxiliary Mixed-Radix Systems (MRS). They serve as the intermediate systems in the scaling process. All MRS's are associated with the given RNS with respect to the base, but they have different sets of weights. For the scaling factor value resulting from the requirements of the given signal processing algorithm, the suitable MRS can be chosen that allows to obtain the scaling result in most simple manner.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 76; 175-179
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On configuration of residue scaling process in pipelined radix-4 MQRNS FFT processor
    Autorzy:
    Smyk, R.
    Czyżak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/377692.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    fast Fourier transform
    residue number system
    modified quadratic residue number system
    FFT pipelined processor
    Opis:
    Residue scaling is needed in pipelined FFT radix-4 processors based on the Modified Quadratic Residue Number System (MQRNS) at the output of each butterfly. Such processor uses serial connection of radix-4 butterflies. Each butterfly comprises n subunits, one for each modulus of the RNS base and generates four complex residue numbers. In order to prevent the arithmetic overflow in the succesive stage, every number has to be scaled, i.e. divided by a certain constant. The dynamic range of the processed signal increases due to the summation within the butterfly and the transformation of coefficients of the FFT algorithm to integers. The direct approach would require eight residue scalers that would be highly ineffective regarding that such a set of scalers had to be placed after each butterfly. We show and analyze a structure which uses parallel-to-serial transformation of groups of numbers so that only two scalers are needed.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2014, 80; 145-150
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High level synthesis in FPGA of TCS/RNS converter
    Autorzy:
    Smyk, R.
    Czyżak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/377883.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    high–level synthesis
    residue number system
    FPGA
    C++ language
    two's complement–to–residue converter
    Opis:
    The work presents the design process of the TCS/RNS (two's complement–to– residue) converter in Xilinx FPGA with the use of HLS approach. This new approach allows for the design of dedicated FPGA circuits using high level languages such as C++ language. Such approach replaces, to some extent, much more tedious design with VHDL or Verilog and facilitates the design process. The algorithm realized by the given hardware circuit is represented as the program in C++. The performed design experiments had to show whether the obtained structures of TCS/RNS converter are acceptable with respect to speed and hardware complexity. The other aim of the work was to examine whether it is enough to write the program in C++ with the use of basic arithmetic operators or bit–level description is necessary. Finally, we present the discussion of results of the TCS/RNS converter design in Xilinx Vivado HLS environment.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2017, 91; 143-154
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pipelined scaling of signed residue numbers with the mixed-radix conversion in the programmable gate array
    Autorzy:
    Czyżak, M.
    Smyk, R.
    Ulman, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/377373.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    scaling technique
    Mixed-Radix System
    MRS
    Residue Number System
    pipelining
    Opis:
    In this work a scaling technique of signed residue numbers is proposed. The method is based on conversion to the Mixed-Radix System(MRS) adapted for the FPGA implementation. The scaling factor is assumed to be a moduli product from the Residue Number System (RNS) base. Scaling is performed by scaling of terms of the mixed-radix expansion, generation of residue representations of scaled terms, binary addition of these representations and generation of residues for all moduli. The sign is detected on the basis of the value of the most significant coefficient of the MRS representation. For negative numbers their residues are adequately corrected. The basic blocks of the scaler are realized in the form of the modified two-operand modulo adders with included additional multiply and modulo reduction operations. The pipelined realization of the scaler in the Xilinx environment is shown and analyzed with respect to hardware amount and maximum pipelining frequency. The design is based on the LUTs(26x 1) that simulate small RAMs serving as the main component for the look-up realization.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 76; 89-99
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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