Reduced Complexity Decoding Algorithms for Low-density Parity Check Codes and Turbo Codes - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Reduced Complexity Decoding Algorithms for Low-density Parity Check Codes and Turbo Codes write by Chen Jinghu. This book was released on 2003. Reduced Complexity Decoding Algorithms for Low-density Parity Check Codes and Turbo Codes available in PDF, EPUB and Kindle.
Low-density Parity-check Codes with Reduced Decoding Complexity
Low-density Parity-check Codes with Reduced Decoding Complexity - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Low-density Parity-check Codes with Reduced Decoding Complexity write by Benjamin Smith. This book was released on 2007. Low-density Parity-check Codes with Reduced Decoding Complexity available in PDF, EPUB and Kindle. This thesis presents new methods to design low-density parity-check (LDPC) codes with reduced decoding complexity. An accurate measure of iterative decoding complexity is introduced. In conjunction with extrinsic information transfer (EXIT) chart analysis, an efficient optimization program is developed, for which the complexity measure is the objective function, and its utility is demonstrated by designing LDPC codes with reduced decoding complexity. For long block lengths, codes designed by these methods match the performance of threshold-optimized codes, but reduce the decoding complexity by approximately one-third. The performance of LDPC codes is investigated when the decoder is constrained to perform a sub-optimal decoding algorithm. Due to their practical relevance, the focus is on the design of LDPC codes for quantized min-sum decoders. For such a decoder, codes designed for the sum-product algorithm are sub-optimal, and an alternative design strategy is proposed, resulting in gains of more than 0.5 dB.
Turbo-like Codes
Turbo-like Codes - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Turbo-like Codes write by Aliazam Abbasfar. This book was released on 2007-09-09. Turbo-like Codes available in PDF, EPUB and Kindle. This book introduces turbo error correcting concept in a simple language, including a general theory and the algorithms for decoding turbo-like code. It presents a unified framework for the design and analysis of turbo codes and LDPC codes and their decoding algorithms. A major focus is on high speed turbo decoding, which targets applications with data rates of several hundred million bits per second (Mbps).
Performance Analysis and Optimization of Reduced Complexity Low Density Parity Check Decoding Algorithms
Performance Analysis and Optimization of Reduced Complexity Low Density Parity Check Decoding Algorithms - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Performance Analysis and Optimization of Reduced Complexity Low Density Parity Check Decoding Algorithms write by Jeff Castura. This book was released on 2000. Performance Analysis and Optimization of Reduced Complexity Low Density Parity Check Decoding Algorithms available in PDF, EPUB and Kindle. Reduced complexity decoding algorithms for Low Density Parity Check codes are presented. The performance of these algorithms is optimized using the concept of density evolution and they are shown to perform well in practical decoding situations. The codes are examined from a performance vs. complexity point of view. It is shown that there is an optimal complexity for practical decoders beyond which performance will suffer. The idea of practical decoding is used to develop the sum-transform-sum algorithm, which is very well suited for a fixed-point hardware implementation. The performance of this algorithm approaches that of the sum-product algorithm, but is much less complex.
Low Density Parity Check Code for Next Generation Communication System
Low Density Parity Check Code for Next Generation Communication System - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Low Density Parity Check Code for Next Generation Communication System write by Mayank Ardeshana. This book was released on 2011-12. Low Density Parity Check Code for Next Generation Communication System available in PDF, EPUB and Kindle. Channel coding provides the means of patterning signals so as to reduce their energy or bandwidth consumption for a given error performance. LDPC codes have been shown to have good error correcting performance which enables efficient and reliable communication. LDPC codes have linear decoding complexity but performance approaching close to shannon capacity with iterative probabilistic decoding algorithm. In this dissertation, the performance of different error correcting code such as convolution, Reed Solomon(RS), hamming, block code are evaluated based on different parameters like code rate, bit error rate (BER), Eb/No, complexity, coding gain and compare with LDPC code. In general, message passing algorithm and the sum-product algorithm are used to decode the message. We showed that logarithmic sum-product algorithm with long block length code reduces multiplication to addition by introducing logarithmic likelihood ratio so that it achieves the highest BER performance among all the decoding algorithms. The astonishing performance combined with proposed modified MS decoding algorithm make these codes very attractive for the next generations digital broadcasting system (ABS - S).
