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be challenged and removed. (March 2013) (Learn how and when to remove this template message) In digital transmission, the number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit bit error rate example synchronization errors. The bit error rate (BER) is the number of bit errors per unit time.
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The bit error ratio (also BER) is the number of bit errors divided by the total number of transferred bits during a studied time
Bit Error Rate Vs Snr
interval. BER is a unitless performance measure, often expressed as a percentage.[1] The bit error probability pe is the expectation value of the bit error ratio. The bit error ratio can be considered as an approximate estimate of the
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bit error probability. This estimate is accurate for a long time interval and a high number of bit errors. Contents 1 Example 2 Packet error ratio 3 Factors affecting the BER 4 Analysis of the BER 5 Mathematical draft 6 Bit error rate test 6.1 Common types of BERT stress patterns 7 Bit error rate tester 8 See also 9 References 10 External links Example[edit] As an example, assume this transmitted bit sequence: 0 1 1 0 0 0 1 acceptable bit error rate 0 1 1 and the following received bit sequence: 0 0 1 0 1 0 1 0 0 1, The number of bit errors (the underlined bits) is, in this case, 3. The BER is 3 incorrect bits divided by 10 transferred bits, resulting in a BER of 0.3 or 30%. Packet error ratio[edit] The packet error ratio (PER) is the number of incorrectly received data packets divided by the total number of received packets. A packet is declared incorrect if at least one bit is erroneous. The expectation value of the PER is denoted packet error probability pp, which for a data packet length of N bits can be expressed as p p = 1 − ( 1 − p e ) N {\displaystyle p_{p}=1-(1-p_{e})^{N}} , assuming that the bit errors are independent of each other. For small bit error probabilities, this is approximately p p ≈ p e N . {\displaystyle p_{p}\approx p_{e}N.} Similar measurements can be carried out for the transmission of frames, blocks, or symbols. Factors affecting the BER[edit] In a communication system, the receiver side BER may be affected by transmission channel noise, interference, distortion, bit synchronization problems, attenuation, wireless multipath fading, etc. The BER may be improved by choosing a strong signal strength (unless this causes cross-talk and more bit errors), by choosing a slow and robust modulation scheme or line coding scheme, and by applying channel coding schemes such as
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Sign Up Subjects TOD bit error rate (BER) Definition + Create New Flashcard Popular Terms Standard transmission-error rate of a media such as copper wire, coaxial cable, or fiber-optic cable. http://www.businessdictionary.com/definition/bit-error-rate-BER.html Used as a measure of transmission quality, it is the ratio of error-bits received to the total bits sent. BER is expressed usually as a negative power of ten: BER of fiber-optic cable, for example, is 10-10 or one wrong bit every ten billion (10,000,000,000) bits about one error in a week at normal transmission speeds. primary data information SAP error rate secondary data information sys... mainframe compu... computer manufacturing r... input device electronic medi... You Also Might Like... Jeffrey Glen LAN vs. WAN Computer networks fall into one of two very broad categories, a Local Area Network (LAN) and a Wide Area Network (WAN). LANs are something most of us interact with regularly and refer to networks like the one bit error rate you have at home or the one you have ... Read more Jeffrey Glen Incidence vs. Prevalence ADVERTISEMENT Jeffrey Glen Advise vs. Advice Ryan May How Your Small Business Can Take Advantage of ... Though consumer spending is expected to grow this year, the predictions for holiday sales are lower than last year's rate of growth, making it vital to seize upon every possible advantage during the crucial post-Thanksgiving shopping weekend. And for ... Read more Email Print Embed Copy & paste this HTML in your website to link to this page bit error rate (BER) Browse Dictionary by Letter: # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Never miss another term. Sign up for our FREE newsletter today! © 2016 WebFinance Inc. All Rights Reserved.Unauthorized duplication, in whole or in part, is strictly prohibited. Privacy, Disclaimers & Copyright COMPANY About Us Contact Us Advertise with Us Careers RESOURCES Articles Flashcards Citations All Topics FOLLOW US OUR APPS