In digital signal processing applications, we usually use DFT (discrete Fourier transform) to transfer signal from time-domain to frequency-domain. In past decades, there were many papers discussing and exploiting FFT (fast Fourier transform) architectures for hardware implementation. In this paper, we proposed a novel VLSI FFT processor based on parallel-pipelined constant geometry algorithm (...

ion and Overhead A major goal of PVL is that a reasonably mapped application should be able to achieve performance close to that which can be achieved by native mathematical and message-passing libraries on a given platform. To examine our success in this goal, we measured the amount of overhead PVL adds to an optimized FFT operation. This section describes these performance results in more det...

A parallel and pipelined Fast Fourier Transform (FFT) processor for use in the Orthogonal Frequency division Multiplexer (OFDM) and WLAN, unlike being stored in the traditional ROM. The twiddle factors in our pipelined FFT processor can be accessed directly. A novel simple address mapping scheme and the modified radix 4 FFT also proposed. FPGA was majorly used to develop the ASIC IC’s to which ...

This paper describes in detail the design of a CMOS custom fast Fourier transform (FFT) processor for computing a 256-point complex FFT. The FFT is well-suited for realtime spectrum analysis in instrumentation and measurement applications. The FFT butterfly processor reported here consists of one parallel–parallel multiplier and two adders. It is capable of computing one butterfly computation e...

We have developed a high-performance FFT on SGI Altix 3700, improving the efficiency of the floating-point operations required to compute FFT by using a kind of loop fusion technique. As a result, we achieved a performance of 4.94 Gflops at 1-D FFT of length 4096 with an Itanium 2 1.3 GHz (95% of peak), and a performance of 28 Gflops at 2-D FFT of 4096 with 32 processors. Our FFT kernel outperf...

هدف: پژوهش حاضر با هدف بررسی مقایسه اثربخشی گروه درمانی شناختی – رفتاری و ذهن ­آگاهی مبتنی بر شناخت کاهش رفتارهای پرخطر در معتادان ترک افیونی صورت گرفت. روش: روش این شبه آزمایشی طرح پیش آزمون پس همراه کنترل است. جامعه­ی آماری شامل کلیه افراد وابسته به مواد مراجعه کننده مرکز اعتیاد شبکه بهداشت درمان شهرستان سرپل ذهاب نیمه اول سال 1396 بود، نمونه­ گیری دسترس تعداد 36 نفر تشخیص وابستگی اساس معیاره...

The FFT(Fast Fourier Transform) processing is one of the key procedure in the popular orthogonal frequency division multiplexing(OFDM) based communication system such as Digital Audio Broadcasting(DAB),Digital Video Broadcasting Terrestrial(DVB-T),Asymmetric Digital Subscriber Loop(ADSL) etc.These application domain require performing FFT in various size from 64 to 8192 point. Implementing each...