Ternary Turbo Coded Modulation Using Embedded Known Digits Technique

• Main Author: 周毓堂
• Other Authors: Hsie-Chia Chang
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/dm89ra

碩士 === 國立交通大學 === 電子工程系所 === 94 === Recently, (binary) turbo code is one of most important coding techniques for wireless communication due to its excellent error correction ability. The main problem of turbo code is that using a long interleaver is able to support its remarkable performance, but a long decoding latency and huge memory size are introduced. Moreover, at high SNR, the error floor phenomenon causes that turbo code unable to achieve very low bit error rates. In this thesis the ternary turbo coded modulation using embedded prior information, in short, called EPI TTC is presented. Comparison with binary turbo code with interleaver size of 20730, the proposed system with interleaver size of 800 can save not only memory size about 86% but also decoding latency about 94%. In addition, it has 0.2 dB and 0.6 dB performance gains than binary turbo code at BER of 10-5 and 10-6, separately.