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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/25000
標題: | 多重編碼率低密度奇偶校正碼之解碼器
適用於IEEE 802.16e Multi-Rate LDPC Decoder for IEEE 802.16e |
作者: | Yu-Min Chang 張育民 |
指導教授: | 顧孟愷(Mong-kai ku) |
關鍵字: | 低密度奇偶校正碼, LDPC,IEEE 802.16e, |
出版年 : | 2007 |
學位: | 碩士 |
摘要: | Because of its excellent bit-error-rate performance, the Low-Density Parity-
Check (LDPC) Code was adopted in standards of IEEE 802.16e (Metropoli- tan Area Network). The IEEE 802.16e LDPC code currently consists of six di®erent code classes spanning four di®erent code rates (1/2, 2/3, 3/4 and 5/6) and support variable code length. In this thesis, we present a multi- rate LDPC decoder architecture for IEEE 802.16e. Our overlapping schedule can improve the latency of the block-serial layered decoder architecture by 1.7x-2.7x, with a small hardware requirements. The proposed architecture adopts layer decoding algorithm with scaling min-sum approximation and utilizes value-reuse property of min-sum approximation to save memory re- quirement of LDPC decoder. The decoding throughput of the decoder can achieve 500Mbps. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/25000 |
全文授權: | 未授權 |
顯示於系所單位: | 資訊工程學系 |
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ntu-96-1.pdf 目前未授權公開取用 | 2.71 MB | Adobe PDF |
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