Article

# A Parallel Architecture for the Self-Sorting FFT Algorithm

Univ Santiago, Fac Fis, Dept Electr & Comp, E 15706 Santiago, Spain and Univ Malaga, Fac Informat, Dept Arquitectura Comp, E 29013 Malaga, Spain

Journal of Parallel and Distributed Computing (Impact Factor: 1.12). 11/1995; 31(1):88–97. DOI: 10.1006/jpdc.1995.1147 Source: DBLP

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**ABSTRACT:**A major challenge of software-defined radio (SDR) is to realize many giga operations per second of flexible baseband processing within a power budget of only a few hundred mW. A heterogeneous hardware architecture with the programmable vector processor EVP as key component can support WLAN, UMTS, and other standards. A detailed rationale for the EVP architecture, based on the analysis of a number of key algorithms, as well as implementation and benchmarking results are described.EURASIP journal on advances in signal processing 01/2005; · 0.89 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**A filter structure formed as a linear combination of stack filters (L-stack-filters), is studied. These types of filters include many useful filter classes, e.g., linear FIR filters and nonlinear threshold Boolean filters, and L- filters. An efficient algorithm for finding optimal filter coefficients under the mean squared error (MSE) criterion is derived. A subclass of the above filters, called FFT-ordered L-filters (FFT-LF), is studied in detail. In this case the bank of filters is formed according to a generalized structure of the FFT flowchart. It is shown that FFT-LFs effectively remove mixed Gaussian and impulsive noise. While possessing good characteristics of performance, FFT-LFs are simple in implementation. In the sense of implementation the most complicated FFT-LFs are the well-known L-filters. We suggest an efficient parallel architecture implementing FFT- LFs as well as a family of discrete orthogonal transforms including discrete Fourier and Walsh transforms. Both linear and nonlinear L-filter-type filters are implemented effectively on the architecture. Comparison with known architectures implementing both linear and nonlinear filter reveals advantages of the proposed architecture. An efficient implementation of L-stack-filters is also proposed.Journal of Electronic Imaging 01/1996; 5:323-334. · 0.85 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**In this paper we present an approach to simplify the design of IFFT/FFT cores for OFDM applications, A novel software tool is proposed, called AFORE. It is able to generate efficient single and multiple mode IFFT/FFT processors. AFORE employs a parallel architecture, where the degree of parallelism can be varied. This way, the tool can find a trade off between area and processing time to meet the system specification. In order to assess the quality of the proposed approach, results are provided for some of the most widely used OFDM standards, such as, WLAN 802.11a/g, WMAN 802.16a, DVB-T.IEEE Transactions on Consumer Electronics 03/2006; · 1.16 Impact Factor

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