论文信息 - A Heterogeneous Hypercube Based On Strengthened Nodes For A Fast Processing Of SAR Raw-data

A Heterogeneous Hypercube Based On Strengthened Nodes For A Fast Processing Of SAR Raw-data

A family of high performance processing elements has been conceived to implement flexible multiprocessor structures for real-time applications. The floating-point capabilities of the INMOS transputer components (T222-T805) have been improved, by using the AT&T floating-point Digital Signal Processors (DSP32-DSP32C), allowing to achieve up to 25 MFLOPS, 30 MIPS. In the paper, the design of a single board T800/DSP-32C based is presented and the simulation results of its specialization in signal processing applications are also reported. A comparative test between the traditional Cooley-Tukey FFT Algorithm (aA) and the Prime Factor Algorithm (PFA) shows that a 4096 complex points radix 4-CTA takes 16.6 ms. while for a 5040 complex points PFA about 32.3 ms are needed. A flexible development system has been also realized to allow a careful design of various "Strengthened Nodes", since it can be used as test-bed to compare the performance of different DSPs available on the market, when they are connected to components of the transputer family. "Strengthened Nodes" will be used in heterogeneous multiprocessor structures specialized for Synthetic Aperture Radar (SAR) data processing.

C. Marzocca | G. Aloisio | M. Bochicchio

[1] Geoffrey Fox,et al. Two approaches to the concurrent implementation of the prime factor algorithm on a hypercube , 1991, Concurr. Pract. Exp..

[2] G. C. Fox,et al. The prime factor non-binary discrete Fourier transform and use of Crystal_Router as a general purpose communication routine , 1989, C3P.

[3] H. Nussbaumer. Fast Fourier transform and convolution algorithms , 1981 .

[4] T. Parks,et al. A prime factor FFT algorithm using high-speed convolution , 1977 .

[5] C. Elachi,et al. Spaceborne synthetic-aperture imaging radars: Applications, techniques, and technology , 1982, Proceedings of the IEEE.

[6] S. Winograd. A new method for computing DFT , 1977 .

[7] Charles M. Rader,et al. Number theory in digital signal processing , 1979 .

[8] H. K. Ramapriyan,et al. Synthetic aperture radar signal processing on the MPP , 1987 .

[9] N. Veneziani,et al. Fmt Digital Signal Processing Techniques For Spaceborne Synthetic Aperture Radars , 1989, 12th Canadian Symposium on Remote Sensing Geoscience and Remote Sensing Symposium,.