R
Rolf Johannesson
Researcher at Lund University
Publications - 151
Citations - 2663
Rolf Johannesson is an academic researcher from Lund University. The author has contributed to research in topics: Convolutional code & Block code. The author has an hindex of 24, co-authored 151 publications receiving 2584 citations.
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Book ChapterDOI
Fundamentals of Convolutional Coding
TL;DR: This book can be used as a textbook for graduate-level electrical engineering students and will be of key interest to researchers and engineers of wireless and mobile communication, satellite communication, and data communication.
Proceedings Article
A fast algorithm for computing distance spectrum of convolutional codes
Mats Cedervall,Rolf Johannesson +1 more
TL;DR: In this paper, a fast algorithm for searching a tree (FAST) was presented for computing the distance spectrum of convolutional codes, which can be easily modified to determine the number of nonzero information bits of an incorrect path as well as the length of an error event.
Journal ArticleDOI
A fast algorithm for computing distance spectrum of convolutional codes
Mats Cedervall,Rolf Johannesson +1 more
TL;DR: A fast algorithm for searching a tree (FAST) is presented for computing the distance spectrum of convolutional codes and several of the listed encoders have distance spectra superior to those of any previously known codes of the same rate and memory.
Journal ArticleDOI
Searching for Voltage Graph-Based LDPC Tailbiting Codes With Large Girth
TL;DR: Using the principle of tailbiting, compact representations of bipartite graphs based on convolutional codes can be found and bounds on the girth and the minimum distance of LDPC block codes constructed in such a way are discussed.
A linear algebra approach to minimal convolutional encoders
Rolf Johannesson,Zhe-Xian Wan +1 more
TL;DR: The authors review the work of G.D. Forney, Jr., on the algebraic structure of convolutional encoders and proven that the constraint lengths of two equivalent minimal-basic encoding matrices are equal one by one up to a rearrangement.