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 . 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.
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 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.
Algorithms and Architectures for Efficient Low Density Parity Check (LDPC) Decoder Hardware
Algorithms and Architectures for Efficient Low Density Parity Check (LDPC) Decoder Hardware - 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 Algorithms and Architectures for Efficient Low Density Parity Check (LDPC) Decoder Hardware write by Tinoosh Mohsenin. This book was released on 2010. Algorithms and Architectures for Efficient Low Density Parity Check (LDPC) Decoder Hardware available in PDF, EPUB and Kindle. Many emerging and future communication applications require a significant amount of high throughput data processing and operate with decreasing power budgets. This need for greater energy efficiency and improved performance of electronic devices demands a joint optimization of algorithms, architectures, and implementations. Low Density Parity Check (LDPC) decoding has received significant attention due to its superior error correction performance, and has been adopted by recent communication standards such as 10GBASE-T 10 Gigabit Ethernet. Currently high performance LDPC decoders are designed to be dedicated blocks within a System-on-Chip (SoC) and require many processing nodes. These nodes require a large set of interconnect circuitry whose delay and power are wire-dominated circuits. Therefore, low clock rates and increased area are a common result of the codes' inherent irregular and global communication patterns. As the delay and energy costs caused by wires are likely to increase in future fabrication technologies new solutions dealing with future VLSI challenges must be considered. Three novel message-passing decoding algorithms, Split-Row, Multi-Splitand Split-Row Threshold are introduced, which significantly reduce processor logical complexity and local and global interconnections. One conventional and four Split-Row Threshold LDPC decoders compatible with the 10GBASE-T standard are implemented in 65 nm CMOS and presented along with their trade-offs in error correction performance, wire interconnect complexity, decoder area, power dissipation, and speed. For additional power saving, an adaptive wordwidth decoding algorithm is proposed which switches between a 6-bit Normal Mode and a reduced 3-bit Low Power Mode depending on the SNR and decoding iteration. A 16-way Split-Row Threshold with adaptive wordwidth implementation achieves improvements in area, throughput and energy efficiency of 3.9x, 2.6x, and 3.6x respectively, compared to a MinSum Normalized implementation, with an SNR loss of 0.25 dB at BER = 10−7. The decoder occupies a die area of 5.10 mm2, operates up to 185 MHz at 1.3 V, and attains an average throughput of 85.7 Gbps with early-termination. Low power operation at 0.6 V gives a worst case throughput of 9.3 Gbps--above the 6.4 Gbps 10GBASE-T requirement, and an average power of 31 mW.
Resource Efficient LDPC Decoders
Resource Efficient LDPC Decoders - 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 Resource Efficient LDPC Decoders write by Vikram Arkalgud Chandrasetty. This book was released on 2017-12-05. Resource Efficient LDPC Decoders available in PDF, EPUB and Kindle. This book takes a practical hands-on approach to developing low complexity algorithms and transforming them into working hardware. It follows a complete design approach – from algorithms to hardware architectures - and addresses some of the challenges associated with their design, providing insight into implementing innovative architectures based on low complexity algorithms.The reader will learn: Modern techniques to design, model and analyze low complexity LDPC algorithms as well as their hardware implementation How to reduce computational complexity and power consumption using computer aided design techniques All aspects of the design spectrum from algorithms to hardware implementation and performance trade-offs Provides extensive treatment of LDPC decoding algorithms and hardware implementations Gives a systematic guidance, giving a basic understanding of LDPC codes and decoding algorithms and providing practical skills in implementing efficient LDPC decoders in hardware Companion website containing C-Programs and MATLAB models for simulating the algorithms, and Verilog HDL codes for hardware modeling and synthesis
