coherence bandwidth

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• Coherence bandwidth — is a statistical measurement of the range of frequencies over which the channel can be considered flat , or in other words the approximate maximum bandwidth or frequency interval over which two frequencies of a signal are likely to experience… …   Wikipedia

• Coherence (physics) — In physics, coherence is a property of waves that enables stationary (i.e. temporally and spatially constant) interference. More generally, coherence describes all properties of the correlation between physical quantities of a wave. When… …   Wikipedia

• Coherence length — In physics, coherence length is the propagation distance from a coherent source to a point where an electromagnetic wave (or wave packet, wave function, etc.) maintains a specified degree of coherence. The significance is that interference will… …   Wikipedia

• Coherence theory — In physics, coherence theory is the study of optical effects arising from partially coherent light and radio sources. Partially coherent sources are sources where the coherence time or coherence length are limited by bandwidth, by thermal noise,… …   Wikipedia

• Optical coherence tomography — Intervention Optical Coherence Tomography (OCT) image of a sarcoma MeSH …   Wikipedia

• Cache coherence — In computing, cache coherence (also cache coherency) refers to the consistency of data stored in local caches of a shared resource. Multiple Caches of Shared Resource When clients in a system maintain caches of a common memory resource, problems… …   Wikipedia

• Atomic coherence — In physics, atomic coherence is the induced coherence between levels of a multi level atomic system sometimes observed when it interacts with a coherent electromagnetic field.If a coherent, narrow bandwidth laser is applied to a two level system …   Wikipedia

• Fading — This article is about signal loss in telecommunications. For the poetry book, see Fading (book). For other uses, see Fade (disambiguation). Frequency selective time varying fading causes a cloudy pattern to appear on a spectrogram. Time is shown… …   Wikipedia

• Narrowband — In radio, narrowband describes a channel in which the bandwidth of the message does not significantly exceed the channel s coherence bandwidth. It is a common misconception that narrowband refers to a channel which occupies only a small amount of …   Wikipedia

• Multipath propagation — This article is about the electromagnetic propagation phenomenon. For the computing storage term, see Multipath I/O. For the routing term, see Multipath Routing. In wireless telecommunications, multipath is the propagation phenomenon that results …   Wikipedia

• Frequency — For other uses, see Frequency (disambiguation). Three cyclically flashing lights, from lowest frequency (top) to highest frequency (bottom). f is the frequency in hertz (Hz), meaning the number of cycles per second. T is the period in seconds (s) …   Wikipedia