Results 31 to 40 of about 1,791,426 (298)

Performance Improvement of Space Missions Using Convolutional Codes by CRC-Aided List Viterbi Algorithms

open access: yesIEEE Access, 2023
Recently, CRC-aided list decoding of convolutional codes has gained attention thanks to its remarkable performance in the short blocklength regime. This paper studies the convolutional and CRC codes of the Consultative Committee for Space Data System ...
Riccardo Schiavone   +2 more
doaj   +1 more source

Design of high-speed and low-latency Viterbi decoder

open access: yesDianzi Jishu Yingyong, 2018
In a Viterbi decoder, there are two known memory organization techniques for the storage of survivor sequences, namely register exchange method and traceback method.
Yang Min
doaj   +1 more source

Turbo Detection of Space-time Trellis-Coded Constant Bit Rate Vector-Quantised Videophone System using Reversible Variable-Length Codes, Convolutional Codes and Turbo Codes

open access: yes, 2004
In this treatise we characterise the achievable performance of a proprietary video transmission system, which employs a Constant Bit Rate (CBR) video codec that is concatenated with one of three error correction codecs, namely a Reversible Variable ...
Yeap, B. L.   +3 more
core   +1 more source

Convolutional coded dual header pulse interval modulation for line of sight photonic wireless links. [PDF]

open access: yes, 2009
The analysis and simulation for convolutional coded dual header pulse interval modulation (CC-DH-PIM) scheme using a rate ½ convolutional code with the constraint length of 3 is presented.
Ghassemlooy, Zabih, Rajbhandari, Sujan
core   +1 more source

A Robust Watermarking Scheme in YCbCr Color Space Based on Channel Coding

open access: yesIEEE Access, 2019
The rapid development of big data and cloud computing technologies greatly accelerate the spreading and utilization of images and videos. The copyright protection for images and videos is becoming increasingly serious.
Yun Tan   +5 more
doaj   +1 more source

Space-Time Convolutional Codes over Finite Fields and Rings for Systems with Large Diversity Order

open access: yesEURASIP Journal on Wireless Communications and Networking, 2008
We propose a convolutional encoder over the finite ring of integers modulo pk,ℤpk, where p is a prime number and k is any positive integer, to generate a space-time convolutional code (STCC).
B. F. Uchôa-Filho   +1 more
doaj   +2 more sources

A Standard-Compatible Forward Error Correction Extension for the Automatic Identification System

open access: yesJournal of Marine Science and Engineering
The Automatic Identification System (AIS) is a maritime radio system that regularly broadcasts vessel data, such as the vessel’s identification, position, course and speed.
Armin Dammann   +3 more
doaj   +1 more source

On isometries for convolutional codes

open access: yesAdvances in Mathematics of Communications, 2009
In this paper we will discuss isometries and strong isometries for convolutional codes. Isometries are weight-preserving module isomorphisms whereas strong isometries are, in addition, degree-preserving. Special cases of these maps are certain types of monomial transformations.
openaire   +3 more sources

A Fast Method for Blind Identification of Punctured Convolutional Codes [PDF]

open access: yesRadioengineering, 2018
The existing method for blind identification of a punctured convolutional code involves searching for dual words and the puncturing pattern exhaustively.
S. N. Han, M. Zhang, X. H. Li
doaj  

Group convolutional codes

open access: yesAdvances in Mathematics of Communications, 2008
In this note we introduce the concept of group convolutional code. We make a complete classification of the minimal $S_3$-convolutional codes over the field of five elements by means of Jategaonkar's theorems.
Sergio Estrada   +3 more
openaire   +2 more sources

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