{"title":"Non-uniform signal constellation for iteratively decoded bit interleaved coded modulation (BICM-ID) with convolution and LDPC codes","authors":"Tarek Arafa, W. Sauer-Greff, R. Urbansky","doi":"10.1109/INNOVATIONS.2011.5893825","DOIUrl":null,"url":null,"abstract":"Bit interleaved coded modulation with iterative demapping and decoding (BICM-ID) is an effective technique to achieve high spectral efficiency with performance close to capacity limits. However, the use of non-uniform signal constellation following a Gaussian distribution instead of conventional equiprobable signaling provides a further improvement, i.e. shaping gain. In this paper, we investigate the effect of nonuniform constellation on the performance of BICM-ID systems with different forward error correction (FEC) coding schemes such as convolution code and low-density parity-check (LDPC) code as outer code. Simulation results show that the non-uniform constellations can offer a shaping gain up to 0.21 dB.","PeriodicalId":173102,"journal":{"name":"2011 International Conference on Innovations in Information Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2011-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 International Conference on Innovations in Information Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/INNOVATIONS.2011.5893825","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Bit interleaved coded modulation with iterative demapping and decoding (BICM-ID) is an effective technique to achieve high spectral efficiency with performance close to capacity limits. However, the use of non-uniform signal constellation following a Gaussian distribution instead of conventional equiprobable signaling provides a further improvement, i.e. shaping gain. In this paper, we investigate the effect of nonuniform constellation on the performance of BICM-ID systems with different forward error correction (FEC) coding schemes such as convolution code and low-density parity-check (LDPC) code as outer code. Simulation results show that the non-uniform constellations can offer a shaping gain up to 0.21 dB.