A Fully Custom Survivor Memory Unit for Viterbi Decoder with Low Power Pulsed Edge-Triggered Latches

• Main Authors: Wei-Li Su, 蘇韋力
• Other Authors: Herming Chiueh
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/03099716141399870052

碩士 === 國立交通大學 === 電信工程系所 === 94 === Viterbi decoders are widely used in communication systems as decoding convolutional codes which provide a superior error correction capacity while maintaining a reasonable coding complexity and computing resource. However, power dissipation has become a critical issue in modern communication systems which have emphasized low power features due to shortage of battery life. In this thesis, a fully custom register-exchange based SMU hard macro which is composed of a lot number of low power registers is presented for Viterbi decoders. We first propose our low power low swing static edge-triggered latch (ETL) which is very suitable for the register-exchange SMU design due to its less clock loading and fewer transistors number at power and area domain. We not only simulate proposed low swing static ETL in 0.13 um CMOS process, but also in 90 nm CMOS process especially interesting in leakage power dissipation. Then we based on the proposed static ETL to construct our low power SMU hard macro by means of the fully custom design flow, and the power consumption under the specified test pattern is merely about 27.3% as compared with the synthesized SMU from EDA synthesizer. The Layout implementation environment of this work is in TSMC 0.13 um CMOS process.