{"title":"数字在线LDPC解码器中信息精度变化的影响","authors":"P. Marshall, V. Gaudet, D. Elliott","doi":"10.1109/SiPS.2012.32","DOIUrl":null,"url":null,"abstract":"Increasing the pipeline depth of bit-parallel message-passing low-density parity-check (LDPC) decoders can be done by increasing the number of simultaneously decoded frames, or by decreasing the amount of parallelism in the decoder. In digit-serial decoders, the pipeline depth can also be increased by increasing message precision. Digit-online decoders are a class of digit-serial decoders that use redundant notation to allow for most-significant-digit-first processing of LLR messages. This paper examines the effect of changing the precision of LLRs on the throughput, area and energy efficiency of digit-online decoders for the irregular WiMAX rate 3/4A length 1056 block code. Both single-frame and frame-interlaced decoding are considered. Digit-online decoders have a throughput that is largely independent of message precision. Frame-interlaced decoding has a higher throughput than single-frame, but has an increased energy/bit cost.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Effects of Varying Message Precision in Digit-Online LDPC Decoders\",\"authors\":\"P. Marshall, V. Gaudet, D. Elliott\",\"doi\":\"10.1109/SiPS.2012.32\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Increasing the pipeline depth of bit-parallel message-passing low-density parity-check (LDPC) decoders can be done by increasing the number of simultaneously decoded frames, or by decreasing the amount of parallelism in the decoder. In digit-serial decoders, the pipeline depth can also be increased by increasing message precision. Digit-online decoders are a class of digit-serial decoders that use redundant notation to allow for most-significant-digit-first processing of LLR messages. This paper examines the effect of changing the precision of LLRs on the throughput, area and energy efficiency of digit-online decoders for the irregular WiMAX rate 3/4A length 1056 block code. Both single-frame and frame-interlaced decoding are considered. Digit-online decoders have a throughput that is largely independent of message precision. Frame-interlaced decoding has a higher throughput than single-frame, but has an increased energy/bit cost.\",\"PeriodicalId\":286060,\"journal\":{\"name\":\"2012 IEEE Workshop on Signal Processing Systems\",\"volume\":\"12 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2012-10-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2012 IEEE Workshop on Signal Processing Systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/SiPS.2012.32\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2012 IEEE Workshop on Signal Processing Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SiPS.2012.32","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effects of Varying Message Precision in Digit-Online LDPC Decoders
Increasing the pipeline depth of bit-parallel message-passing low-density parity-check (LDPC) decoders can be done by increasing the number of simultaneously decoded frames, or by decreasing the amount of parallelism in the decoder. In digit-serial decoders, the pipeline depth can also be increased by increasing message precision. Digit-online decoders are a class of digit-serial decoders that use redundant notation to allow for most-significant-digit-first processing of LLR messages. This paper examines the effect of changing the precision of LLRs on the throughput, area and energy efficiency of digit-online decoders for the irregular WiMAX rate 3/4A length 1056 block code. Both single-frame and frame-interlaced decoding are considered. Digit-online decoders have a throughput that is largely independent of message precision. Frame-interlaced decoding has a higher throughput than single-frame, but has an increased energy/bit cost.
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