Results 231 to 240 of about 13,774 (286)

Completeness of the COVID-19 vaccination schedule and associated factors among persons experiencing homelessness in Brazil: a national cross-sectional study. [PDF]

open access: yesBMJ Open
Soares Tenorio de Araújo J   +12 more
europepmc   +1 more source

Unequal error protection for convolutional codes

open access: yesIEEE Transactions on Information Theory, 2006
In this correspondence, unequal error-correcting capabilities of convolutional codes are studied. For errors in the information symbols and code symbols, the free input- and output-distances, respectively, serve as "unequal" counterparts to the free distance. When communication takes place close to or above the channel capacity the error bursts tend to
Victor A. Pavlushkov   +2 more
core   +3 more sources

Unequal error protection by modulation with unequal power allocation

IEEE Communications Letters, 2005
In digital communication systems for speech, audio or video signals the individual bits of the transmitted parameters u exhibit different bit error sensitivities. Usually channel coding with unequal error protection (UEP) is applied. However, some transmission systems do not include channel coding for several reasons.
P Vary
exaly   +2 more sources

Linear unequal error protection codes

IEEE Transactions on Information Theory, 1981
The properties of linear codes over GF (q) that provide unequal error protection (UEP) of information digits are discussed. A design is proposed for optimal binary systematic linear UEP codes. Broad classes of iterative and concatenated UEP codes are constructed. Majority decoding algorithms for linear iterative UEP codes are described.
I. M. Boyarinov, G. L. Katsman
exaly   +2 more sources

On-Line Fountain Codes With Unequal Error Protection

IEEE Communications Letters, 2017
A new encoding scheme for on-line fountain codes is proposed to provide unequal error protection (UEP) for source symbols. Both the weighted-selection strategy and the expanding-window strategy are used to achieve the UEP property. We analyze the bound of overhead to demonstrate the performance. We also make comparisons with on-line fountain codes that
Jingxuan Huang   +2 more
exaly   +2 more sources

Rateless Codes With Unequal Error Protection Property

IEEE Transactions on Information Theory, 2007
In this correspondence, a generalization of rateless codes is proposed. The proposed codes provide unequal error protection (UEP). The asymptotic properties of these codes under the iterative decoding are investigated. Moreover, upper and lower bounds on maximum-likelihood (ML) decoding error probabilities of finite-length LT and Raptor codes for both ...
Nazanin Rahnavard   +2 more
exaly   +2 more sources

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