A robust and fabrication tolerant (de)multiplexer on the SOI platform
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We recently demonstrated the angled multimode interferometer (AMMI) as a wavelength (de)multiplexer for 4 channels. We have now extended the device application to eight channels via interleaving, and we propose denser integration via ring resonator enhancement.Keywords:
Interleaving
In this paper, we propose a new interleaving method for solving burst errors that occur in page oriented data storage channels. We compare the performance with other interleaving techniques. Burst errors frequently occur in holographic data storage channels. Many interleaving schemes have been proposed to solve these burst error problems. At 1024 × 1024 pixels, the proposed interleaving scheme provides 1.5–2.0 dB signal-to-noise ratio (SNR) gain compared to other interleaving schemes. Also, at 256 × 256 pixels, the proposed interleaving scheme provides 4.5–5.0 dB more SNR gain compared to other interleavers.
Interleaving
Burst error
Holographic Data Storage
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Following the fast development of space science technology, the data transfer system of spacecraft becomes more and more complex. Traditional multiplexer only supports one or two types of services, and its multiplexing method and scheduling strategy can not be changed during the space mission. Using the advance orbit system suggested by CCSDS, this paper introduces a method to design a reconfigurable multiplexer which supports four types of services and is compatible for three multiplexing methods. The multiplexer’s multiplexing method and scheduling strategy can be reconfigured by the registers which makes the multiplexer high flexible.
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We present experimentally the possibility of mode multiplexing using two launch positions and successful demultiplexing using two detection areas in order to double the data rate from 10 Gb/s to 20 Gb/s over multimode fibre.
Mode (computer interface)
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In this paper we give an overview on the status of devices for analog multiplexing and demultiplexing and experimental results in general and on the results achieved within the ECSEL Taranto project.
Time-division multiplexing
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A system is described for providing adaptive control of equipment for analog television signal multiplexing by frame interleaving. The control system measures the image activity of input video signals and allocates frames on a multiplexed video transmission channel to each input as required. A demonstration two-input system was constructed and extensively tested. Demultiplexed image quality was found to be improved over that provided by a fixed rate frame multiplexing system.
Interleaving
Frame rate
Time-division multiplexing
SIGNAL (programming language)
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This paper considers the problem of performance analysis for the multiplexer, when homogeneous periodic on-off sources are statistically multiplexed. Periodic on-off source model is defined that on-period and off-period are repeated by once in a deterministic periodic time and in on-period, cell arrives with deterministic time interval. In order to reflect periodicity of source model, we consider two multiplexing situation, such as random multiplexing and synchronized multiplexing. In both case, we obtain the overload-period distribution in the multiplexer, and an approximate method using the overload period distribution is suggested for obtaining the CLP(Cell Loss Probability) in the buffer of the multiplexer. A numerical example using MPEG-I real traffic samples and the results are also presented.Keywords: multiplexer, traffic shaper, periodic on-off sources, video traffic sources
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In a multichannel picture transmission system data rate reduction can be achieved by multiplexing. The multiplexer essentially consists of a switch which interconnects a particular scanner to the transmission channel. The position of the switch is controlled by features such as significant changes derived from the pictures to be transmitted. Economy seems favorable due to the sharing of most of the equipment.
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A five-mode densely packed waveguide array and (de)multiplexer on Si are demonstrated for mode division multiplexing. Insertion losses of −0.8dB and cross-talks of −22dB have been obtained experimentally for a device with multiplexing and de-multiplexing structures.
Waveguide
Optical add-drop multiplexer
Time-division multiplexing
Mode (computer interface)
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The mapping and multiplexing unit is a very important part of SDH Add_Drop Multiplexer and Terminal Multiplexer. This paper introduced how to realize SDH mapping and multiplexing in SDH Add_Drop Multiplexer with a new SDH mapping device which supports 21 E1 ports.
Time-division multiplexing
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The possibility of creating a fibre multiplexer/demultiplexer with large-scale multiplexing without any basic restrictions on the number of channels and the spectral spacing between them is shown. The operating capacity of a fibre multiplexer based on a four-fibre array ensuring a spectral spacing of 0.7 pm (~ 10 GHz) between channels is demonstrated.
Demultiplexer
Optical add-drop multiplexer
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