White Papers

An Ultra-Low Power Multi-Mode LDPC Decoder Chip for Mobile WiMAX System

Overview This paper presents an ultra-low power multi-mode decoder design for Quasi-Cyclic LDPC codes for Mobile WiMAX system. Based on proposed overlapped decoding mechanism, the decoding latency can be reduced to 68.75% of non-overlapped method, and the hardware utilization ratio can be enhanced from 50% to 75%. The new early termination strategy can dynamically adjust iteration number when dealing with communication channels of different SNR values. In addition, the paper proposes an Efficient Checkerboard Layout Scheme (ECLS) to reduce routing complexity in chip implementation. The multi-mode LDPC decoder design is implemented and fabricated in TSMC 0.13um CMOS technology.

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Publisher: National Taiwan University
File Format: PDF
Date Published: Apr 23, 2009
Format: White Papers
Topics: WiMAX (802.16), Mobile - Wireless Communications

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