Pseudorandom noise (PRN) is a signal similar to noise which satisfies one or more of the standard tests for statistical randomness. Signaling, or a signal, may mean: Scientific concepts In information theory, a signal is a flow of information that can be represented as a mathematical function. ... In science, and especially in physics and telecommunication, noise is fluctuations in and the addition of external factors to the stream of target information (signal) being received at a detector. ... In statistics, a random number is a single observation (outcome) of a specified random variable. ...

Although it seems to lack any definite pattern, pseudorandom noise consists of a deterministic sequence of pulses that will repeat itself after its period. A pattern is a form, template, or model (or, more abstractly, a set of rules) which can be used to make or to generate things or parts of a thing, especially if the things that are generated have enough in common for the underlying pattern to be inferred or discerned... This is a page about mathematics. ... In signal processing, the term pulse has the following meanings: A rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value, followed by a rapid return to the baseline value. ...

This sequence is known as a chip and the inverse of its period as chip rate.

In cryptographic devices, pseudo-random noise is mixed with entropy to increase randomness. Entropy of a Bernoulli trial as a function of success probability. ...

Pseudorandom noise is used in some electronic musical instruments, either by itself or as an input to subtractive synthesis. A classic FM synthesizer, the Yamaha DX7. ... Subtractive synthesis is a method of sound synthesis characterised by the application of an audio filter to a source signal. ...

In spread-spectrum systems, modulated carrier transmissions appear as noise to any receiver that is: Spread-spectrum telecommunications is a technique in which a signal is transmitted in a bandwidth considerably greater than the frequency content of the original information. ... For the musical use of modulation, see modulation (music). ... A carrier wave is a waveform (usually sinusoidal) that is modulated (modified) to represent the information to be transmitted. ...

1. not locked on the transmitter frequencies; or
2. incapable of correlating a locally generated pseudorandom sequence with the received signal.

A pseudonoise code is one that has a spectrum similar to a random sequence of bits but is deterministically generated. Sine waves of various frequencies; the lower waves have higher frequencies than those above. ... In probability theory and statistics, correlation, also called correlation coefficient, is a numeric measure of the strength of linear relationship between two random variables. ... A signal is an abstract element of information, or (more commonly) a flow of information (in one or more dimensions). ... In statistics, a random number is a single observation (outcome) of a specified random variable. ... Determinism is the philosophical conception which claims that every physical event, including human cognition and action, is causally determined by an unbroken chain of prior occurrences. ...

See also: Pseudorandom number sequence, Pseudorandom number generator, n-sequence, Federal Standard 1037C, MIL-STD-188 A Pseudorandom number sequence is a sequence of numbers that has been computed by some defined arithmetic process but is effectively a random number sequence for the purpose for which it is required. ... A pseudorandom number generator (PRNG) is an algorithm that generates a sequence of numbers, the elements of which are approximately independent of each other. ... In telecommunication, an n-sequence is a pseudorandom binary sequence of n bits that is the output of a linear shift register, such that, if the shift register is set to any nonzero state and then cycled, a pseudorandom binary sequence of a maximum of n = 2m -1 bits will... Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U.S. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. ... MIL-STD-188 is a series of U.S. military standards relating to telecommunications. ...