:'' AFSR also stands for the Argonne Fast Source Reacto
-- see
list of nuclear reactors
A ''list'' is any set of items in a row. List or lists may also refer to:
People
* List (surname)
Organizations
* List College, an undergraduate division of the Jewish Theological Seminary of America
* SC Germania List, German rugby union ...
.''
:'' AFSR was also the abbreviation of the
Armed Forces of South Russia
The Armed Forces of South Russia (AFSR or SRAF) () were the unified military forces of the White movement in southern Russia between 1919 and 1920.
On 8 January 1919, the Armed Forces of South Russia were formed, incorporating the Volunteer Army ...
.''
An analog feedback shift register (AFSR) is a generalization of the (binary, digital)
linear-feedback shift register
In computing, a linear-feedback shift register (LFSR) is a shift register whose input bit is a linear function of its previous state.
The most commonly used linear function of single bits is exclusive-or (XOR). Thus, an LFSR is most often a sh ...
(LFSR).
While binary LFSRs require less power to generate
spread spectrum
In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency dom ...
signals than AFSRs, AFSR receivers require less power (in theory) to synchronize to those signals than binary LFSR receivers.
As of 2005, AFSRs are still in research.
AFSR techniques could make spread-spectrum receivers (such as
GPS
The Global Positioning System (GPS), originally Navstar GPS, is a Radionavigation-satellite service, satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of t ...
receivers and
cell phone
A mobile phone, cellular phone, cell phone, cellphone, handphone, hand phone or pocket phone, sometimes shortened to simply mobile, cell, or just phone, is a portable telephone that can make and receive calls over a radio frequency link whil ...
s and
Wi-Fi
Wi-Fi () is a family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio wave ...
receivers and
RFID
Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists of a tiny radio transponder, a radio receiver and transmitter. When triggered by an electromag ...
s) cost less and have longer battery lifetimes.
External links
A Nonlinear Dynamic System for Spread Spectrum Code Acquisitionby Benjamin Vigoda 1999
C/A-code Synchronization Using Analog Feedback Shift Registers (AFSR)by Daniel Megnet-Kägi, et al. 2004
Pseudo-noise Sequences based on Algebraic Feedback Shift Registersby Mark Goresky and Andrew Klapper (2005??)
Fast Acquisition GPS Receiversby H. Mathis, HSR Rapperswil 2004
Pseudorandom number generators
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