constant envelope

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• Constant false alarm rate — (CFAR) detection refers to a common form of adaptive algorithm used in radar systems to detect target returns against a background of noise, clutter and interference. Other detection algorithms are not adaptive. Non adaptive detectors are… …   Wikipedia

• Envelope (mathematics) — In mathematics, an envelope of a family of manifolds (especially a family of curves) is a manifold that is tangent to each member of the family at some point.Envelope of a family of curvesThe simplest formal expression for an envelope of curves… …   Wikipedia

• Envelope detector — An envelope detector is an electronic circuit that takes a high frequency signal as input, and provides an output which is the envelope of the original signal. The capacitor in the circuit stores up charge on the rising edge, and releases it… …   Wikipedia

• ADSR envelope — mdash; over time. The envelope may be a discrete circuit or module (in the case of analog devices), or implemented as part of the unit s software (in the case of digital devices).When a mechanical musical instrument produces sound, the Loudness… …   Wikipedia

• Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …   Wikipedia

• Ambiguity function — In pulsed radar and sonar signal processing, an ambiguity function isa two dimensional function of time delay and Doppler frequencychi( au,f) showing the distortion of an uncompensated matched filter (sometimes called pulse compression) due to… …   Wikipedia

• Continuous phase modulation — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

• FM-UWB — is a modulation scheme using double FM: a low modulation index digital FSK followed by a high modulation index analog FM to create a constant envelope UWB signal. FDMA techniques at the sub carrier level may be exploited to accommodate multiple… …   Wikipedia

• Space–time block code — This article deals with coherent space–time block codes (STBCs). For differential space–time block codes, see differential space–time codes.Space–time block coding is a technique used in wireless communications to transmit multiple copies of a… …   Wikipedia

• Satmode — SATMODE: ALWAYS ON SATELLITE RETURN PATH TECHNOLOGY FOR DIGITAL INTERACTIVE TV PLATFORMS.The lack of an efficient and scalable return path has always limited true interactivity over satellite TV. Remote interactivity is the key element needed for …   Wikipedia

• Polar modulation — is analogous to quadrature modulation in the same way that polar coordinates are analogous to Cartesian coordinates. Quadrature modulation makes use of Cartesian coordinates, x and y . When considering quadrature modulation, the x axis is called… …   Wikipedia