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Digital signal

About: Digital signal is a research topic. Over the lifetime, 44213 publications have been published within this topic receiving 345279 citations.


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Patent
11 Jun 1998
TL;DR: In this article, an information processing system has signal processors that are interconnected by processing junctions that simulate and extend biological neural networks. And the response of each processing junction is determined by internal junction processes and is continuously changed with temporal variation in the received signal.
Abstract: An information processing system having signal processors that are interconnected by processing junctions that simulate and extend biological neural networks. As shown in the figure, each processing junction receives signals from one signal processor and generates a new signal to another signal processor. The response of each processing junction is determined by internal junction processes and is continuously changed with temporal variation in the received signal. Different processing junctions connected to receive a common signal from a signal processor respond differently to produce different signals to downstream signal processors. This transforms a temporal pattern of a signal train of spikes into a spatio-temporal pattern of junction events and provides an exponential computational power to signal processors. Each signal processing junction can receive a feedback signal from a downstream signal processor so that an internal junction process can be adjusted to learn certain characteristics embedded in received signals.

153 citations

Patent
28 Mar 1997
TL;DR: In this article, the authors proposed a method for the joint detection of multiple coded digital signals that share the same transmission medium in a manner that causes mutual interference, consisting of two steps that are applied to preliminary estimates of each digital signal, one or more times.
Abstract: A method for the joint detection of multiple coded digital signals that share the same transmission medium in a manner that causes mutual interference. The method is comprised of two steps that are applied to preliminary estimates of each digital signal, one or more times. The first step is to obtain reliability estimates for each data element of each digital signal by combining the preliminary estimates, a statistical model for the interference, and any a priori information regarding the data elements. The second step is to revise these reliability estimates for each digital signal based on the forward error correction code used for that digital signal. When the steps are repeated, the revised reliability estimates from the second step are used as a priori information for the first step.

153 citations

Patent
28 Oct 1996
TL;DR: In this paper, a system for remotely monitoring and transmitting data and other information received from utility and other devices is disclosed, which includes a device for sensing and collecting data at a first location.
Abstract: A system for remotely monitoring and transmitting data and other information received from utility and other devices is disclosed. The universal meter reader of the present invention includes a device for sensing and collecting data at a first location. The sensed data that is in analog form is converted to a digital signal and a processing unit processes the data. The data is subsequently stored in a memory device for subsequent transmission to an interested party. In one embodiment, the data can be digitally transmitted over a GSM or TDMA technology digital network via a control channel. In addition, the universal meter reader includes a connective interface for connecting to a telecommunications system at a first location to establish a wireless telecommunications connection. An improved infrared reader of the present invention includes an infrared transmitter and receiver. A reflective member is displaced between the transmitter and the receiver and creates an optical communication with the rotatable disk, dial or mechanical indicator located within a conventional utility meter. The improved meter is capable of measuring the number of disk, dial or mechanical indicator rotations and is also capable of calculating and storing utility usage from the number of disk rotations. The data is then capable of being transmitted via a wired or wireless connection to the universal meter reader or a display unit.

153 citations

Patent
06 Jun 1995
TL;DR: In this paper, the number of information packets in a frame is determined by the ratio of the product of the transmission bit-rate and the number represented in the frame, to the product between the bits in a packet and the sampling frequency.
Abstract: Reproduction accuracy of a digital signal, representing for example stereo audio signals, is improved by transmitting sample data which have been encoded to form transmission signals. The transmission signals are arranged in consecutive frames, each frame including a plurality of information packets, and each information packet including N bits. The number of information packets in a frame is determined by the ratio of the product of the transmission bit-rate and the number of samples represented in the frame, to the product of the number of bits in a packet and the sampling frequency. The transmission signals are recorded in a record carrier, or are transmitted in real time. In a digital stereo audio signal embodiment, the samples may be sub-band encoded or transform encoded. The transmission signal may include an indicator signal indicating a combination of certain samples, or scale factor signals for specific components of the sampled signal.

152 citations

Patent
27 Oct 2004
TL;DR: In this paper, a transmission system for transmitting digital information via a power supply network is described, which consists of a generator for generating a simulated digital wave-form carrying the digital information to be transmitted, and a high-voltage injector to inject the generated simulated digital signal into the power supply.
Abstract: Disclosed is a transmission system for transmitting digital information via a power supply network. In one embodiment, there is a transmission device which comprises a generator for generating a simulated digital wave-form carrying the digital information to be transmitted, and a high-voltage injector to inject the generated simulated digital wave-form carrying the digital information into the power supply network. A receiving device is also disclosed, which comprises an analog detector for detecting predetermined harmonic frequencies of a signal frequency, and a logic device to output a logic signal corresponding to the output of the analog detector as said digital information.

151 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20239
202225
2021190
2020755
2019942
2018915