# Correlators

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### Conferences related to Correlators

2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting

The joint meeting is intended to provide an international forum for the exchange of information on state of the art research in the area of antennas and propagation, electromagnetic engineering and radio science

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.

2020 IEEE International Solid- State Circuits Conference - (ISSCC)

ISSCC is the foremost global forum for solid-state circuits and systems-on-a-chip. The Conference offers 5 days of technical papers and educational events related to integrated circuits, including analog, digital, data converters, memory, RF, communications, imagers, medical and MEMS ICs.

2020 IEEE/MTT-S International Microwave Symposium (IMS)

The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

### Periodicals related to Correlators

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission

The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.

Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.

### Xplore Articles related to Correlators

UK IT 1990 Conference, 1990

A description is given of the theory of operation of acousto-optic (AO) devices and correlators in general. Two different applications of twin Bragg cell space-integrating correlator/convolvers are then discussed. In the first a heterodyning technique is employed in which light at different optical frequencies is mixed to give the convolution of the signals applied to the two AO cells. The ...

Improvements in sampling and recording technology have made it possible to acquire data at rates of higher than 1 Gbit/s. In very long baseline interferometry, the use of wide-bandwidth data produces a high SNR, which is proportional to <tex>$\sqrt{2BT}$</tex> (B is bandwidth and T is integration time). In astronomical applications, wide-bandwidth data acquisition can be used to detect very small ...

1994 Proceedings of IEEE Ultrasonics Symposium, 1994

This paper presents a SAW based correlator receiver for a Differential Phase Shift Keying Direct Sequence Spread Spectrum (DPSK/DSSS) receiver. The DPSK modulation format allows the noncoherent data demodulation while the SAW device correlator acts as the despreading operator. In a conventional DPSK receiver, the received signal is normally split into a lower and upper path. One of the paths ...

1960 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1960

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IEE Proceedings F - Radar and Signal Processing, 1989

A novel form of twin Bragg cell, nonheterodyning, space-integrating optical correlator convolver has been built and tested using digitally generated signals. The system is fundamentally a convolver but may be made to act as a correlator by time-reversing the signal to one of the Bragg cells. It is found that the nature of the correlation/convolution function obtained depends upon the ...

### Educational Resources on Correlators

#### IEEE.tv Videos

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#### IEEE-USA E-Books

• A description is given of the theory of operation of acousto-optic (AO) devices and correlators in general. Two different applications of twin Bragg cell space-integrating correlator/convolvers are then discussed. In the first a heterodyning technique is employed in which light at different optical frequencies is mixed to give the convolution of the signals applied to the two AO cells. The system is configured to implement the first two stages of the multiply-convolve-multiply algorithm so that the power spectrum of the input- signal is obtained. The second system is a novel nonheterodyning correlator/convolver. It is shown that by amplitude modulating the signals on to the Bragg cell carrier frequency using double sideband large carrier modulation, the full correlation function including amplitude and phase information, may be extracted by measuring only the intensity of light at the output of the system.<<ETX>>

• Improvements in sampling and recording technology have made it possible to acquire data at rates of higher than 1 Gbit/s. In very long baseline interferometry, the use of wide-bandwidth data produces a high SNR, which is proportional to <tex>$\sqrt{2BT}$</tex> (B is bandwidth and T is integration time). In astronomical applications, wide-bandwidth data acquisition can be used to detect very small flux densities of cosmic radio sources. It is also useful in geodetic applications. The signal processing of the current correlation processing algorithm is bit serial. The data-processing speed, however, is restricted by the correlation device clock in serial data processing, and as a result, the device speed prevents the whole (channel) bandwidth from being used for observations. To overcome this problem, a new correlation processing algorithm for parallel bit stream set processing has been developed. This article focuses on how to derive serial data processing algorithms for parallel bit stream.

• This paper presents a SAW based correlator receiver for a Differential Phase Shift Keying Direct Sequence Spread Spectrum (DPSK/DSSS) receiver. The DPSK modulation format allows the noncoherent data demodulation while the SAW device correlator acts as the despreading operator. In a conventional DPSK receiver, the received signal is normally split into a lower and upper path. One of the paths contains a correlator, while the other path contains a one data bit delay element and another correlator. The outputs of both paths are then fed to a noncoherent data demodulator. This paper combines both the delay element and the two correlators in a single SAW device, and therefore a better temperature tracking mechanism, simplicity, as well as the elimination of the broadband SAW delay line are achieved. The SAW structure contains a broadband SAW transducer, and two serially coded Pseudo Noise (PN) DPSK filters. The SAW based correlator was built on lithium tantalate. The center frequency was set to 150 MHz, with a 63 chip PN spreading code and a data rate of 300 kbps. Experimental measurements in both the time and frequency domains were performed and were compared to computer simulation predictions

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• A novel form of twin Bragg cell, nonheterodyning, space-integrating optical correlator convolver has been built and tested using digitally generated signals. The system is fundamentally a convolver but may be made to act as a correlator by time-reversing the signal to one of the Bragg cells. It is found that the nature of the correlation/convolution function obtained depends upon the way in which the signals are amplitude modulated onto the Bragg cell carrier frequency. If a suppressed carrier form of modulation is used the correlation/convolution of the squares of the signals is obtained but when a large carrier modulation is used the true correlation/convolution of the signals may be extracted from the detector output by highpass filtering. The experimental results obtained from the system are shown to be in agreement with theory. A unique feature of the system is that it enables both the amplitude and phase of the correlation function to be obtained but requires only the intensity of the light at the output of the system to be measured. Previous systems to obtain the same result have involved heterodyning (interferometric) techniques which are significantly more complex and difficult to use than the system described.<<ETX>>

• This overview of 1987 developments focuses on missiles, which overshadowed other events. The discussion covers the performance of Cruise missiles; the development of radar-triggered missiles; and the accuracy of the US Trident II missile. Also considered are the B-1B bomber and antimissile plans for the US Strategic Defense Initiative. An expert opinion is offered by Thomas F. Curry, chief scientist at E-Systems' center for advanced planning and analysis, who discusses belt-tightening by the US Department of Defense.<<ETX>>

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• Measurements of the autocorrelation function of picosecond pulses at 1.5 /spl mu/m from an erbium-doped fibre laser and amplifier have been carried out, exploiting a nonlinear intensity-dependent response in a silicon photodiode. The same photodiode is used both for the generation and the detection of the autocorrelation signal, allowing the construction of a compact and inexpensive optical autocorrelator.

• This paper will describe circuit configuration and integrated circuit processes for two types of LSI parallel digital correlators which operate at 20-MHz data rate and produce an analog output. Test data for a monolithic 64-bit module will be offered.

• A novel mixed configuration for a very high bandwidth correlator, which can work either as an electronic clipped correlator or as a fibre-optic correlator, is presented. The mixed architecture achieves the speed characteristic of the fibre-optic correlator and can maintain the versatility of the clipped correlator.<<ETX>>

### Standards related to Correlators

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