New decoding methods for ldpc codes on error and error-erasure channels master of science thesis by i̇lke altin august 19, 2010 committee members supervisor : dr ir jh weber readers : prof dr ir i niemegeers dr ir h wang wireless and mobile communications group faculty of. Novel ldpc coding and decoding strategies: design, analysis, and algorithms this thesis is submitted in partial fulfilment of the requirements for doctor of philosophy (phd) jingjing liu communications research group department of electronics university of york december 2012. Decoding algorithm the work reported here is an expanded and revised version of my doctoral dissertation, completed in 1960 in the department of electrical engineering mit i am grateful to my thesis supervisor, professor peter elias, and to my thesis readers, professors robert m fano and john m wozencraft, for. Dissertation efficient decoding techniques for ldpc codes ausgeführt zum zwecke der erlangung des akademischen grades eines doktors der technischen wissenschaften eingereicht an der technischen universität wien fakultät für elektrotechnik und informationstechnik von dipl-ing gottfried lechner. In this thesis, a restructured parity-check matrices which can be divided into sub- matrices for ldpc code in dvb-s2 is provided corresponded to this re- structured parity-check matrix, a reconstructed decoding table is invented the encoding table of dvb-s2 standard only could obtain the unknown check.
A hardware decoder architecture is presented in this thesis for quasi-cyclic (qc) low-density parity check (ldpc) codes the decoder is real-time configurable and supports 15 codes which are combination of 3 rates and 5 lengths the partly parallel architecture implements layered decoding a check. University of tartu faculty of mathematics and computer science institute of computer science cyber security yauhen yakimenka optimization of parity -check matrices of ldpc codes master's thesis (30 ects) supervised by dr vitaly skachek tartu, estonia 2014. Encoding and decoding need to be of low complexity to achieve high throughput and low power consumption this thesis provides a literature review of the current state-of-the-art in encoding and decoding of ldpc codes message- passing decoders are still capable of achieving the best error-correcting performance, while. Capable of decoding multiple quasi-cyclic ldpc codes is therefore desirable this thesis investigates binary quasi-cyclic ldpc codes and designs a generic, flexible vhdl decoder the decoder is further enhanced to automatically select the most likely decoder based on the initial a posterior probability of the parity- check.
This dissertation presents new methods for the analysis, design and decoding of low- density parity-check (ldpc) codes we start by studying the simplest class of decoders: the binary message-passing (bmp) decoders we show that the optimum bmp decoder must satisfy certain symmetry and isotropy conditions, and. Addressed in one thesis the main contribution of this thesis is the development of ldpc code construction methods for some classes of structured ldpc codes and techniques for reducing decoding time we introduce two main methods for constructing structured codes in the first method, column-weight two ldpc codes. Abstract low-density parity-check (ldpc) codes have become quite popular these days they have good performance which is close to shannon limits and can be used in satellite communication with excellent results this thesis presents elemen- tary tools for work with them mainly we show how to generate pseudo-.
Tanner code with single parity-check local codes (eg, ldpc and high-density parity- check codes) we prove that if a locally-optimal codeword for depth h exists, then the nwms algorithm finds it in h iterations hence, if successful, the nwms algorithm has an ml-certificate for any bounded number of iterations furthermore. Low-complexity decoding algorithms and architectures for non-binary ldpc codes by fang cai submitted in partial fulfillment of the requirements for the degree of doctor of philosophy thesis adviser: dr xinmiao zhang department of electrical engineering and computer science. The error floor performance of an ldpc code is closely related to the graphical structures of the tanner graph of the code two important classes of such structures are short cycles and trapping sets, which have been the main focus of many studies as well as that of this thesis in this thesis, we analyze the graphical.
Ldpc codes – structural analysis and decoding techniques a dissertation submitted in partial satisfaction of the requirements for the degree doctor of philosophy in electrical engineering (communication theory and systems) by xiaojie zhang committee in charge: professor paul h siegel, chair. In this thesis, ldpc codes of shorter length are considered as they offer advantages in terms of latency and complexity, at the cost of performance degradation from the increased number of short cycles in the graph for these shorter ldpc codes, the problems considered are: first, improved construction of structured and.
Ldpc coding systems by thuy van nguyen, bs, ms dissertation presented to the faculty of the university of texas at dallas in partial fulfillment of the requirements for the degree of doctor of philosophy in electrical engineering the university of texas at dallas december. Acceptance of the thesis new iterative decoding algorithms for low-density parity-check (ldpc) codes submitted by nastaran mobini, bsc in partial fulfillment of the requirements for the degree of master of applied science in electrical engineering professor claude d'amours, examiner professor ian marsland.