نتایج جستجو برای: cordic
تعداد نتایج: 507 فیلتر نتایج به سال:
Abstract: A coordinate rotation digital computer (CORDIC) based variable length reconfigurable DCT/IDCT algorithm and corresponding architecture are proposed. The proposed algorithm is easily to extend to the 2-point DCT/IDCT. Furthermore, we can easily construct the N-point DCT/IDCT with two N/2-pt DCTs/IDCTs based the proposed algorithm. The architecture based on the proposed algorithm can su...
Abstract— Now-a-days Radar Signal Processing system is gaining a great deal of attention for realization of on-chip programmable signal processor for its real time applications. Application specific systems are being implemented using wide spectrum of Digital Signal Processing (DSP) algorithms. Such is the case for COordinate Rotation DIgital Computer (CORDIC) algorithm which is turned out to b...
Modern FPGAs targeting the embedded market overcome the typical drawback of high power consumption by offering low quiescent currents and power-saving stand-by modes, whilst still providing useful computing resources and retaining design flexibility. We present Hardware Design Studio 3 (HDS3), a powerful graphical software tool which allows for rapid entry of DSP designs and subsequent optimisa...
In this paper we present a specific CORDIC processor for variable-precision coordinates. This system allows us to specify the precision to perform the CORDIC operation, and control the accuracy of the result, in such a way that re-computation of inaccurate results can be carried out with higher precision. It permits a reliable and accurate evaluation of a wide range of elementary functions. The...
Since radix-10 arithmetic has been gaining renewed importance over the last few years, high performance decimal systems and techniques are highly demanded. In this paper, a modification of the CORDIC method for decimal arithmetic is proposed so as to improve calculations. The algorithm works with BCD operands and no conversion to binary is needed. A significant reduction in the number of iterat...
Direct Digital Frequency Synthesizer Pentomics’ first DDS patent concerns a method and apparatus for DDS which, unlike the traditional table-lookup methods, uses a simplified “angle-rotation” algorithm implemented as a multiplierless feedforward datapath, allowing easy pipelining and limiting the accumulation of roundoff errors. Our DDS’s modular architecture permits outputs of arbitrary precis...
| In this paper we take the class of Jacobi-type algorithms and present a systematic way to derive an architecture for execution of the time adaptive QR and QR ?1 algorithms, two members of the class. We know that Jacobi-type algorithms nd natural expression in Cordic arithmetic and that high-throughput implementations ask for parallel operating pipelined Cordic processor elements. Based on thi...
CORDIC based cascade orthogonal IIR digital filters have sharp transition band and exhibit low sensitivity in both pass band and stop band which are suitable for VLSI implementations. However, the achievable sample rate of these filters is limited due to the presence of feedback loops. To overcome the speed limitation and achieve high-speed/lowpower implementations, a novel algorithm transforma...
This research paper proposes a novel scaling free CORDIC algorithm to operate in vectoring mode which computes absolute magnitude and phase angle of input vector. Using this algorithm, the micro rotation of the vector is unidirectional and totally scaling free. The range of convergence is successfully extended to cover entire coordinate space without increasing any hardware complexity. Further ...
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