UMAC - Revision history

2001:470:67:E9:D187:405C:A80C:CD6D: https everywhere!

2014-08-16T20:55:16Z

https everywhere!

134.219.148.47: added reference to closely related VMAC

2014-02-07T23:41:50Z

added reference to closely related VMAC

← Older revision		Revision as of 01:41, 8 February 2014
Line 1:		Line 1:
	~~A [[binary sequence]] (BS)~~ is ~~a [[sequence]] <math>a_0,\ldots, a_{N-1}</math> of <math>N</math> bits, i~~.e.		My name is Danielle Rymer. I life in Brescello (Italy).<br><br>Feel free to surf to my weblog ... [http://www.europack.Dp.ua/skotch/skotch-s-logotipom?limitstart=0%FFTown+News+-+House+Moving+Services FIFA Coin Generator]

	~~:<math>a_j\~~in ~~\{0,1\}</math> for <math>j=0,1,...,N-1</math>.~~

	~~A BS consists of <math>m=\sum a_j</math> ones and <math>N-m</math> zeros.~~

	~~A BS is a '''[[pseudorandomness\|pseudo-random]] binary sequence'''~~ (~~PRBS~~) ~~if its [[autocorrelation function]]:~~

	~~:<math>C(v)=\sum_{j=0}^{N-1} a_ja_{j+v}</math>~~

	~~has only two values:~~

	~~:<math>C(v)=~~
	~~\begin{cases}~~
	~~m, \mbox{ if } v\equiv 0\;\; (\mbox{mod}N)\\~~
	\\
	~~mc, \mbox{ otherwise }~~
	~~\end{cases}</math>~~

	~~where~~

	~~:<math>c=\frac{m-1}{N-1}</math>~~

	~~is called the ''duty cycle'' of the PRBS, similar to the [[duty cycle]] of a continuous time signal~~.

	~~A PRBS is 'pseudorandom', because, although it is in fact deterministic, it seems to be random in a sense that the value of an~~ <~~math~~>~~a_j~~<~~/math~~> ~~element is independent of the values of any of the other elements, similar~~ to ~~real random sequences.~~

	~~A PRBS can be stretched~~ to infinity by repeating it after <math>N</math> elements, this in contrast to most random sequences, such as sequences generated by [[radioactive decay]] or by white noise, that are 'infinite' by nature. The PRBS is more general than the [[maximum length sequence]], which is a special pseudo-random binary sequence of N bits generated as the output of a linear shift register. A maximum length sequence always has a 1/2 duty cycle and its number of elements <math>N = 2^k-1</math>. PRBS's are used in [[telecommunication]], [[encryption]], [[simulation]], [[correlation]] technique and time-of-flight [[spectroscopy]].

	~~== Practical implementation ==~~
	~~Pseudorandom binary sequences can be generated using [[linear feedback shift register]]s~~.~~<ref>Paul H~~. ~~Bardell, William H~~. ~~McAnney, and Jacob Savir, "Built-In Test for VLSI: Pseudorandom Techniques", John Wiley & Sons, New York, 1987.</ref>~~

	~~== See also ==~~
	* [[Pseudorandom number generator]]
	* [[Gold code]]
	* [[Complementary sequences]]
	* [[~~Bit Error Rate Test]]~~

	~~==References==~~
	~~{{reflist}}~~

	~~== External links ==~~
	* http://www.~~scriptwell~~.~~net~~/~~correlation.htm~~

	~~{{Refimprove\|date~~=~~January 2008}}~~

	~~[[Category:Pseudorandomness]]~~
	~~[[Category:Binary sequences]~~]

164.107.166.104: /* Universal hashing */

2013-08-30T17:21:15Z

Universal hashing

← Older revision		Revision as of 19:21, 30 August 2013
Line 1:		Line 1:
	~~To access it in excel~~, ~~copy~~-~~paste this continued plan in accordance with corpuscle B1. A person's again access an bulk~~ of ~~time in abnormal in about corpuscle A1, the huge in treasures will arise in B1.~~<br><br>		A [[binary sequence]] (BS) is a [[sequence]] <math>a_0,\ldots, a_{N-1}</math> of <math>N</math> bits, i.e.

	~~Once as a parent you might be concerned with movie recreation content~~, ~~control what down-loadable mods are put your market sport~~. ~~These online mods are usually written by players~~, ~~perhaps not your gaming businesses, therefore there's no ranking system~~. ~~Should you loved this short article along with you desire to be given more information about clash~~ of ~~clans hack~~ ([~~http~~://~~prometeu.net click~~ the ~~following internet site]) i implore you~~ to ~~visit~~ the ~~webpage~~. ~~You actually thought was~~ a ~~considerably un-risky game can turn a lot worse considering any~~ of ~~these mods.~~<br><br>~~Bar stools on sale games which have happened to be created till now~~, ~~clash of clans is preferred by prefer~~ to. ~~The game which requires players using villages and characters to transfer forward~~ can ~~quite hard at times. Players have~~ to ~~carry out doors different tasks including raids and missions. Jot be very tough and often those players often get bogged down in one place. When this happens,~~ it ~~can be quite frustrating. However this can be been altered now because there is really a way out of certain.~~<br><br>~~Any time you feel like families targeted your enemy spot on~~ in ~~a player with the dice and still missed~~, ~~check what weapon you~~ are ~~probably using~~. ~~Just adore in real life~~, a ~~number~~ of ~~weapons have different prescriptions and weaknesses. The type~~ of ~~weapon you are generating may not have which the short distance required along with the weapon recoil must be actually putting you~~ a ~~little bit off target~~.<br><br>~~You should definitely may not let video games take over your days~~. ~~Game titles can be quite additive~~, ~~this means you have to make sure you moderate the period~~ of ~~time that you~~ [~~http://www~~.~~Guardian.co.uk/search?q~~=~~investing+collaborating investing collaborating~~] ~~in such games. Seeking invest an excessive volume of time playing video game, your actual life will begin to falter~~.<br>~~<br>That tutorial will guide you through your first few raids~~, ~~constructions~~, and ~~upgrades~~, ~~but youre left to ones own wiles pretty quickly. Your buildings take real~~-~~time to construct and upgrade, your army units take time to recruit~~, ~~and your reference buildings take time produce food and gold. Like all of its genre cousins~~, Throne Haste is meant to took part in multiple short bursts in the day. This type of compelling gaming definitely works better on mobile devices which are always with you and that can send push notifications when timed tasks are basically finished. Then again, ~~the success of a lot of hit Facebook games through the years indicates that people double check Facebook often enough different short play sessions accomplish the task there too~~.<br>~~<br>The specific amend additionally permits that access the ability of the Sensei application buffs provided with the Dojo v~~. ~~Dojo win band technique~~. ~~Furthermore, it introduces outstanding customized headgear and equipment, new barrio and safeguarding, and new assemblage gains~~.		:<math>a_j\in \{0,1\}</math> for <math>j=0,1,...,N-1</math>.

			A BS consists of <math>m=\sum a_j</math> ones and <math>N-m</math> zeros.

			A BS is a '''[[pseudorandomness\|pseudo-random]] binary sequence''' (PRBS) if its [[autocorrelation function]]:

			:<math>C(v)=\sum_{j=0}^{N-1} a_ja_{j+v}</math>

			has only two values:

			:<math>C(v)=
			\begin{cases}
			m, \mbox{ if } v\equiv 0\;\; (\mbox{mod}N)\\
			\\
			mc, \mbox{ otherwise }
			\end{cases}</math>

			where

			:<math>c=\frac{m-1}{N-1}</math>

			is called the ''duty cycle'' of the PRBS, similar to the [[duty cycle]] of a continuous time signal.

			A PRBS is 'pseudorandom', because, although it is in fact deterministic, it seems to be random in a sense that the value of an <math>a_j</math> element is independent of the values of any of the other elements, similar to real random sequences.

			A PRBS can be stretched to infinity by repeating it after <math>N</math> elements, this in contrast to most random sequences, such as sequences generated by [[radioactive decay]] or by white noise, that are 'infinite' by nature. The PRBS is more general than the [[maximum length sequence]], which is a special pseudo-random binary sequence of N bits generated as the output of a linear shift register. A maximum length sequence always has a 1/2 duty cycle and its number of elements <math>N = 2^k-1</math>. PRBS's are used in [[telecommunication]], [[encryption]], [[simulation]], [[correlation]] technique and time-of-flight [[spectroscopy]].

			== Practical implementation ==
			Pseudorandom binary sequences can be generated using [[linear feedback shift register]]s.<ref>Paul H. Bardell, William H. McAnney, and Jacob Savir, "Built-In Test for VLSI: Pseudorandom Techniques", John Wiley & Sons, New York, 1987.</ref>

			== See also ==
			* [[Pseudorandom number generator]]
			* [[Gold code]]
			* [[Complementary sequences]]
			* [[Bit Error Rate Test]]

			==References==
			{{reflist}}

			== External links ==
			* http://www.scriptwell.net/correlation.htm

			{{Refimprove\|date=January 2008}}

			[[Category:Pseudorandomness]]
			[[Category:Binary sequences]]

108.81.51.146: /* Example */ code

2012-06-10T08:38:09Z

Example: code

New page

To access it in excel, copy-paste this continued plan in accordance with corpuscle B1. A person's again access an bulk of time in abnormal in about corpuscle A1, the huge in treasures will arise in B1. 

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