Showing papers on "Multidimensional signal processing published in 1971"
TL;DR: An arbitrary-radix fast Fourier transform algorithm and the design of its implementing signal processing machine are introduced, which yields an implementation with a level of parallelism proportional to the radix r of factorization of the discrete Fouriertransform.
Abstract: An arbitrary-radix fast Fourier transform algorithm and a design of its implementing signal processing machine are introduced. The algorithm yields an implementation with a level of parallelism proportional to the radix r of factorization of the discrete Fourier transform, allows 100 percent utilization of the arithmetic unit, and yields properly ordered Fourier coefficients without the need for pre- or postordering of data.
44 citations
TL;DR: The main purpose of the FDP is to enhance the capability of the UNIVAC facility for performance of digital signal processing operations such as digital filtering and discrete Fourier transforms.
Abstract: This paper contains a description of the architecture of the fast digital processor (FDP), a general purpose digital attachment to a UNIVAC 1219 computer facility. The main purpose of the FDP is to enhance the capability of the UNIVAC facility for performance of digital signal processing operations such as digital filtering and discrete Fourier transforms. The structural design evolved during a series of discussions among the four authors. The FDP is presently being constructed under the supervision of one of the authors, P. McHugh, and should be completed in late 1970.
35 citations
18 citations
Patent•
29 Mar 1971
TL;DR: In this article, a special purpose computing equipment is utilized to perform the Fast Fourier Transform (FFT) algorithm on special purpose computers. And the computing equipment utilizes serial access memory for storing coefficients during interim periods between calculations and by properly alternating between two clock rates for the serial memory, the computer allows the processing of two FFT algorithms simultaneously.
Abstract: Special purpose computing equipment is utilized to perform the Fast Fourier Transform algorithm. The computing equipment utilizes serial access memory for storing coefficients during interim periods between calculations and by properly alternating between two clock rates for the serial memory, the computer allows the processing of two Fast Fourier Transform algorithms simultaneously when the input data for the two algorithms is in different binary order.
14 citations
01 Jan 1971
TL;DR: The field of digital signal processing can encompass the analysis or synthesis of time or spatial signals for a wide variety of applications that include measuring the response of servo systems, spectral analysis of such things as mechanical vibrations in structures, noise in electronic equipment, and speech waveforms.
Abstract: Digital Signal Processing involves the manipulation of linear time invariant waveforms utilizing digital techniques. The field of digital signal processing can encompass the analysis or synthesis of time or spatial signals for a wide variety of applications. These include measuring the response of servo systems, spectral analysis of such things as mechanical vibrations in structures, noise in electronic equipment, and speech waveforms. Other applications include analyzing seismic returns, simulating coherent optical systems, and the processing of radar signal returns. Certain aspects of pattern recognition and picture processing are also amenable to the application of digital signal processing techniques.
5 citations
TL;DR: Segment companding laws are being used in PCM channel banks to permit more efficient signal processing on a digital basis and Signal-to-noise ratio, idle-circuit noise, and attenuation actually achieved are calculated.
Abstract: Segment companding laws are being used in PCM channel banks to permit more efficient signal processing on a digital basis. A unified formulation of these companding laws is used as a basis for the systematic synthesis of digital attenuators operating directly on the compressed code. Simple sequential circuits for digital attenuation are derived from expansion and compression algorithms. Signal-to-noise ratio, idle-circuit noise, and attenuation actually achieved are calculated.
4 citations
01 Jul 1971
TL;DR: The sampled complex envelope of a waveform may be approximated by using linear combinations of two or more successive real samples as complex samples as simple algorithms.
Abstract: The sampled complex envelope of a waveform may be approximated by using linear combinations of two or more successive real samples as complex samples. Simple algorithms are adequate in the case of bandwidths up to about 50 percent. In certain signal processing applications the use of such algorithms permits a reduction in costs by eliminating demodulators.
2 citations
01 Jan 1971
1 citations
TL;DR: Complex BIFORE transform is extended to multiple dimensions and basic properties of multidimensional CBT are developed and a fast algorithm is applied.
Abstract: Complex BIFORE transform (CBT) is extended to multiple dimensions. Basic properties of multidimensional CBT are developed and a fast algorithm for its computation is applied.
1 citations