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A glossary of technical terms compiled from all tutorials in the IEEE eLearning Library


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Low frequency noise (i.e., below 100 kHz) which has a 1/f frequency dependence. This noise source is important in communication systems since it is up-converted to "phase noise" about the carrier frequency, limiting spectral purity of the system.
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MP3 audio(MP3 audio) The traditional calibration model used since the 1960s to model the error terms of a network analyzer. The model contains 6 terms in the forward direction and 6 in the reverse direction. The forward errors are the port-1 match, port-2 match, directivity, reflection tracking, transmission tracking, and the leakage from port-1 to port-2 through the network analyzer converter.
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MP3 audio(MP3 audio) This method models all the stationary and linear error terms of the two-port network analyzer. When making ratio measurements this model can be reduced to 15 error terms. There are 7 error terms that model the directivity (2 terms), match (2 terms), reflection tracking (2 terms) and transmission tracking (1 term). And 8 terms that model all possible leakage paths. The two largest leakage paths are through the LO of the network analyzer converter. The other leakage paths are very small for most coax and waveguide systems. For on wafer measurements the other leakage paths can cause problems in certain measurement situation.
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2

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MP3 audio(MP3 audio) Two dimensional
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MP3 audio(MP3 audio) Spurious products resulting from the 2nd order non-linearity of a mixer or amplifier in a receiver.
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MP3 audio(MP3 audio) Three dimensional
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MP3 audio(MP3 audio) 3G is third-generation technology in the context of mobile phone standards. The services associated with 3G include wide-area wireless voice telephony and broadband wireless data, all in a mobile environment. In marketing 3G services, video telephone has often been suggested as the killer application for 3G.
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MP3 audio(MP3 audio) 3rd Generation Partnership Project (3GPP), a GSM-based consortium advocating standardization for mobile communications, who published Release Five of the Universal Mobile Telecommunications System (UMTS) standard mandating the use of IPv6 by wireless vendors.
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MP3 audio(MP3 audio) In many network analyzers the leakage terms are very small and can be set to zero or the two primary terms can be measured using loads on each port. The model can then be reduced from 16 terms to 8 terms. When making ratio measurements in a network analyzer the errors reduce to 7 terms.
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*between two vectors x and y in Rp, where A is the norm-inducing weight matrix. [Cf. "inner product"]. When A is the pxp identity matrix, this becomes the Euclidean distance.
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MP3 audio(MP3 audio) The measurement of absorption of certain material in a range of wavelength.
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MP3 audio(MP3 audio) Unlike dc motors, ac motors require alternating (ac) voltages and currents
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MP3 audio(MP3 audio) The access network is that portion of a public switched network that connects access nodes to individual subscribers. More simply, it is the last link in a network between the customer premises and the first point of connection to the network infrastructure -- a point of presence or central office.
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MP3 audio(MP3 audio) An unplanned event, or series of events, that results in death, injury, illness, environmental damage, or damage to or loss of equipment or property.
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MP3 audio(MP3 audio) An obligation or willingness to accept responsibility or to account for one's actions.
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MP3 audio(MP3 audio) Means how much does the measured value -- the output from the sensor -- deviates from the true (or NIST-traceable) value of the measurand. (Please note, accuracy is not the same as resolution! They may be related values but not synonymous terms.)
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MP3 audio(MP3 audio) adjacent channel interference
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MP3 audio(MP3 audio) A solid-state electronically tunable spectral bandpass filter which operates on the principle of acousto-optic interaction in an anisotropic medium.
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MP3 audio(MP3 audio) A word (as NATO, radar, or laser) formed from the initial letter or letters of each of the successive parts or major parts of a compound term.
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MP3 audio(MP3 audio) Specific things done or performed to achieve a goal or manage a project.
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MP3 audio(MP3 audio) An algorithm for routing data across Wireless Mesh Networks
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MP3 audio(MP3 audio) analog digital converter
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MP3 audio(MP3 audio) The ratio between the power of that part of the amplified signal falling into an adjacent channel (a specified adjacent channel or part of the channel) to that in the expected channel. There are variations in the actual definitions for different air-interface standards.
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MP3 audio(MP3 audio) An emotion related to the knowledge instinct and not related to 'bodily' instincts (like eating, avoiding danger). Aesthetic emotion is involved in any act of perception and cognition (it is not exclusive to artists or art). Mathematically, aesthetic emotions are described by changes in similarity between the models and the world.
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MP3 audio(MP3 audio) Analog front end
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MP3 audio(MP3 audio) automated gain controller
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MP3 audio(MP3 audio) A list or outline of things to be considered or done, say at meetings.
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MP3 audio(MP3 audio) The sometimes negative quality of making an all-out effort to win or succeed, being overly competitive, vigorously energetic, esp. in the use of initiative and forcefulness; boldly assertive and forward; pushy.
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MP3 audio(MP3 audio) Ambient Intelligent Environments
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MP3 audio(MP3 audio) This method of optimizing a function of many variables has many synonyms: e.g., grouped coordin descent, block optimization, etc. It is basically Picard iteration that "rocks back and forth" in an iterative loop, attempting to improve the value of the objective function at each sub-step.
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MP3 audio(MP3 audio) The choices that one has, limited to several possibilities. In the context of decision-making, the reasonable array of strategies or actions one can take, including "do nothing" or "continue the current strategy."
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MP3 audio(MP3 audio) Amplitude Modulation
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MP3 audio(MP3 audio) Ordinarily, the common reference temperature for a thermal system (i.e. thermal "ground"). For thermal runaway, however, it is more useful to compute an "effective" ambient as the device temperature when dissipating no power. In multiple heat source systems, this combines the true ambient with the influence of all the other heat sources besides the device of immediate interest.
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MP3 audio(MP3 audio) An analog architecture is an information processing system in which the information is represented by physical quantities, truly defined as real numbers (according to the mathematical definition). Computation operates and preserves the analog representation of the information. Typically these systems are implemented by means of analog electrical circuits.
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MP3 audio(MP3 audio) Explicit requirements to assure that different analysts determine failure effects in consistent ways.
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MP3 audio(MP3 audio) The negative electrode of a direct conversion device. At this electrode the fuel is oxidized by ions flowing through the electrolyte from the cathode, and electrons are released to flow through the circuit to the cathode.
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MP3 audio(MP3 audio) Autonomic Nervous System
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MP3 audio(MP3 audio) A type of optical coating applied to the surface of lenses and other optical devices to reduce reflection. This improves the efficiency of the system since less light is lost
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MP3 audio(MP3 audio) Access Point; 802.11 terminology
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MP3 audio(MP3 audio) Avalanche photodiode. A photodetector that achieved internal gain by impact ionization. Compared to PIN photodiode, the APD can provide higher sensitivity in an optical receiver.
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MP3 audio(MP3 audio) The product of the RMS voltage and the RMS current. It is the power that appears to be present based on separate measurement of voltage and current.
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MP3 audio(MP3 audio) A general name for VLSI chips such as Processors, Controllers, etc., containing circuit blocks of Logic, RAM, and I/O.
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MP3 audio(MP3 audio) MFT and dynamic logic are general methods applicable in various fields. The lecture briefly described: clustering, tracking, sensor fusion, non-linear regression, image recognition, text understanding and search engines, financial prediction.
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MP3 audio(MP3 audio) An artificial neuron, also called node, Nv neuron, binary neuron or McCulloch-Pitts neuron, is an abstraction of biological neurons and the basic unit in an artificial neural network. The Artificial Neuron receives one or more inputs (representing the one or more dendrites) and sum them to produce an output (synapse). Usually the sums of each node are weighted, and the sum is passed through a non-linear function known as an activation or transfer function. The canonical form of transfer functions is the sigmoid, but they may also take the form of other non-linear functions, piecewise linear functions, or step functions. Generally, transfer functions are monotonically increasing.
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MP3 audio(MP3 audio) Application specific integrated circuit.
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MP3 audio(MP3 audio) Analog signal processing
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MP3 audio(MP3 audio) The positive quality of being confident or self-assured; stating your feelings or opinions in a positive manner.
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An event that is not synchronous
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MP3 audio(MP3 audio) The reduction in amplitude and intensity of a signal. Signal powers may be attenuated exponentially by transmission through a medium, in which case attenuation is usually reported in dB with respect to distance traveled through the medium.
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MP3 audio(MP3 audio) Designed to aid in learning or teaching by making use of both hearing and sight, e.g., handouts, PowerPoint presentations, boards.
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