東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Design and analysis of low-density p...

Li, Yan.

Linked to FindBook

Google Book

Amazon

博客來

Design and analysis of low-density parity-check codes for disk drives, wireless modems and the Internet.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Design and analysis of low-density parity-check codes for disk drives, wireless modems and the Internet./
Author:	Li, Yan.
Description:	221 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6558.
Contained By:	Dissertation Abstracts International65-12B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3158215
ISBN:	0496907972

Design and analysis of low-density parity-check codes for disk drives, wireless modems and the Internet.
Li, Yan.

Design and analysis of low-density parity-check codes for disk drives, wireless modems and the Internet. - 221 p.

Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6558.

Thesis (Ph.D.)--The University of Arizona, 2005.

We design and analyze LDPC codes for magnetic disk drives, wireless modems, and packet transmission on the internet in this dissertation. A new method of constructing rate-compatible LDPC codes is proposed for large file broadcast on the Internet and a family of variable-length rate-compatible LDPC codes is designed with very low error-rate floors.

ISBN: 0496907972Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Design and analysis of low-density parity-check codes for disk drives, wireless modems and the Internet.
LDR:03301nmm 2200313 4500 001 1815375
005 20060710075936.5
008 130610s2005 eng d
020 $a 0496907972
035 $a (UnM)AAI3158215
035 $a AAI3158215
040 $a UnM $c UnM
100 1 $a Li, Yan. $3 1028952
245 1 0 $a Design and analysis of low-density parity-check codes for disk drives, wireless modems and the Internet.
300 $a 221 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6558.
500 $a Director: William E. Ryan.
502 $a Thesis (Ph.D.)--The University of Arizona, 2005.
520 $a We design and analyze LDPC codes for magnetic disk drives, wireless modems, and packet transmission on the internet in this dissertation. A new method of constructing rate-compatible LDPC codes is proposed for large file broadcast on the Internet and a family of variable-length rate-compatible LDPC codes is designed with very low error-rate floors.
520 $a We study the concatenated zigzag (CZ) code and the turbo product-code with single parity-check component code (TPC/SPC) for EPR4 channel. Simulations show a coding gain of about 4 dB over uncoded EPR4 by the two codes. Collaborating with Seagate Technologies, we made greater than 100Gb/in2 recordings using a TPC/SPC code. A coding gain comparable to the simulations was observed.
520 $a We examine the TPC/SPC-coded EPR4 channel with soft-output Viterbi Algorithm (SOVA) and show that it is SOVA's optimistic reliability outputs that result in SOVA detector's performance degradation relative to the BCJR detector. We propose a simple remedy and demonstrate that the modified SOVA-TPC/SPC system gives about the same performance as the BCJR-TPC/SPC system. Using a similar methodology, we demonstrate the min-sum algorithm for LDPC code also provides optimistic reliability values.
520 $a Based on the Gaussian approximation and EXIT chart, we develop a design technique for LDPC-coded higher-order modulation systems on an AWGN channel and present an example of a 2 bits/symbol LDPC-coded 8PSK scheme operating about 0.6 dB from the capacity at a BER of 10-6. We also propose a reliability-based mapping strategy. Compared to conventional strategies, this strategy gives a 0.15 dB--0.2 dB performance improvement without added complexity.
520 $a The LDPC-coded OFDM system is analyzed based on a mutual information metric. We demonstrate that the mutual information between the transmitted binary sequence and the soft input to LDPC decoder is a precise and robust measure for characterizing the performance of the LDPC-coded system. Given this, we formulate an adaptive bit-loading and power-allocation problem, and design adaptive mutual information-based algorithms. Simulations show that those algorithms ensure the system robust performance against channel fluctuations. It is also shown that, with those algorithms, the system only suffers little performance loss if coding rate adaptation is not used.
590 $a School code: 0009.
650 4 $a Engineering, Electronics and Electrical. $3 626636
690 $a 0544
710 2 0 $a The University of Arizona. $3 1017508
773 0 $t Dissertation Abstracts International $g 65-12B.
790 1 0 $a Ryan, William E., $e advisor
790 $a 0009
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3158215