High Efficiency LDPC Coded Modulation - 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 High Efficiency LDPC Coded Modulation write by Stefan Neuhaus. This book was released on 2014-02-11. High Efficiency LDPC Coded Modulation available in PDF, EPUB and Kindle.
LDPC Coded Modulations
LDPC Coded Modulations - 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 LDPC Coded Modulations write by Michele Franceschini. This book was released on 2009-04-09. LDPC Coded Modulations available in PDF, EPUB and Kindle. This book focuses on the analysis and design of low-density parity-check (LDPC) coded modulations, which are becoming part of several current and future communication systems, such as high-throughput terrestrial and satellite wireless networks. In this book, a two-sided perspective on the design of LDPC coded systems is proposed, encompassing both code/modulation optimization (transmitter side) and detection algorithm design (receiver side). After introducing key concepts on error control coding, in particular LDPC coding, and detection techniques, the book presents several relevant applications. More precisely, by using advanced performance evaluation techniques, such as extrinsic information transfer charts, the optimization of coded modulation schemes are considered for (i) memoryless channels, (ii) dispersive and partial response channels, and (iii) concatenated systems including differential encoding. This book is designed to be used by graduate students working in the field of communication theory, with particular emphasis on LDPC coded communication schemes, and industry experts working on related fields.
Multi-Edge Low-Density Parity-Check Coded Modulation
Multi-Edge Low-Density Parity-Check Coded Modulation - 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 Multi-Edge Low-Density Parity-Check Coded Modulation write by Lei Zhang. This book was released on 2011. Multi-Edge Low-Density Parity-Check Coded Modulation available in PDF, EPUB and Kindle. A method for designing low-density parity-check (LDPC) codes for bandwidth-efficient high-order coded modulation is proposed. Code structure utilizes the multi-edge-type LDPC code ensemble to achieve an improved match between codeword bit protection capabilities and modulation bit-channel capacities over existing LDPC coded modulation techniques. The multi-dimensional EXIT vector field for the specific multi-edge parameterization is developed for the analysis and design of code ensembles. A multi-dimensional EXIT decoding convergence condition is derived to enable efficient optimization. Code design results in terms of ensemble thresholds and finite-length Monte-Carlo simulations indicate that the new technique improves on the state-of-the-art performance, with sig- nificantly lower design and implementation complexity.
Bandwidth-efficient Communication Systems Based on Finite-length Low Density Parity Check Codes
Bandwidth-efficient Communication Systems Based on Finite-length Low Density Parity Check 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 Bandwidth-efficient Communication Systems Based on Finite-length Low Density Parity Check Codes write by . This book was released on 2006. Bandwidth-efficient Communication Systems Based on Finite-length Low Density Parity Check Codes available in PDF, EPUB and Kindle. Low density parity check (LDPC) codes are linear block codes constructed by pseudo-random parity check matrices. These codes are powerful in terms of error performance and, especially, have low decoding complexity. While infinite-length LDPC codes approach the capacity of communication channels, finite-length LDPC codes also perform well, and simultaneously meet the delay requirement of many communication applications such as voice and backbone transmissions. Therefore, finite-length LDPC codes are attractive to employ in low-latency communication systems. This thesis mainly focuses on the bandwidth-efficient communication systems using finite-length LDPC codes. Such bandwidth-efficient systems are realized by mapping a group of LDPC coded bits to a symbol of a high-order signal constellation. Depending on the systems' infrastructure and knowledge of the channel state information (CSI), the signal constellations in different coded modulation systems can be two-dimensional multilevel/multiphase constellations or multi-dimensional space-time constellations. In the first part of the thesis, two basic bandwidth-efficient coded modulation systems, namely LDPC coded modulation and multilevel LDPC coded modulation, are investigated for both additive white Gaussian noise (AWGN) and frequency-flat Rayleigh fading channels. The bounds on the bit error rate (BER) performance are derived for these systems based on the maximum likelihood (ML) criterion. The derivation of these bounds relies on the union bounding and combinatoric techniques. In particular, for the LDPC coded modulation, the ML bound is computed from the Hamming distance spectrum of the LDPC code and the Euclidian distance profile of the two-dimensional constellation. For the multilevel LDPC coded modulation, the bound of each decoding stage is obtained for a generalized multilevel coded modulation, where more than one coded bit is considered for level. For both systems, the bounds are confirmed by the simulation.
Bit-Interleaved Coded Modulation
Bit-Interleaved Coded Modulation - 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 Bit-Interleaved Coded Modulation write by Albert Guillén i Fàbregas. This book was released on 2008. Bit-Interleaved Coded Modulation available in PDF, EPUB and Kindle. Bit-Interleaved Coded Modulation is a comprehensive study of the subject, providing a comprehensive review of one of the most important coding schemes in modern communication systems.
