{"title":"松弛线程空时码","authors":"M. Janani, Aria Nosratinia","doi":"10.1109/GLOCOM.2005.1578315","DOIUrl":null,"url":null,"abstract":"It is well-known that diversity, despite being widely used as a design criterion, may not be enough to ensure good performance of a wireless system, because the diversity factor may \"kick in\" at unrealistically high values of SNR. This paper proposes a new class of layered space-time codes with a new design criterion that works well in moderate SNR's. Specifically, we propose to relax some of the constraints of threaded algebraic space-time (TAST) codes, leading to a class of codes with better error performance, which we call relaxed threaded space time (RTST) codes. We also propose a modified design criterion, the average union bound (AUB), which ensures good performance at medium SNR. For a 2 times 2 system operating at 6 b/s/Hz, improvements of more than 1.5 dB have been observed","PeriodicalId":319736,"journal":{"name":"GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.","volume":"56 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Relaxed threaded space-time codes\",\"authors\":\"M. Janani, Aria Nosratinia\",\"doi\":\"10.1109/GLOCOM.2005.1578315\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"It is well-known that diversity, despite being widely used as a design criterion, may not be enough to ensure good performance of a wireless system, because the diversity factor may \\\"kick in\\\" at unrealistically high values of SNR. This paper proposes a new class of layered space-time codes with a new design criterion that works well in moderate SNR's. Specifically, we propose to relax some of the constraints of threaded algebraic space-time (TAST) codes, leading to a class of codes with better error performance, which we call relaxed threaded space time (RTST) codes. We also propose a modified design criterion, the average union bound (AUB), which ensures good performance at medium SNR. For a 2 times 2 system operating at 6 b/s/Hz, improvements of more than 1.5 dB have been observed\",\"PeriodicalId\":319736,\"journal\":{\"name\":\"GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.\",\"volume\":\"56 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2005-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/GLOCOM.2005.1578315\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/GLOCOM.2005.1578315","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
It is well-known that diversity, despite being widely used as a design criterion, may not be enough to ensure good performance of a wireless system, because the diversity factor may "kick in" at unrealistically high values of SNR. This paper proposes a new class of layered space-time codes with a new design criterion that works well in moderate SNR's. Specifically, we propose to relax some of the constraints of threaded algebraic space-time (TAST) codes, leading to a class of codes with better error performance, which we call relaxed threaded space time (RTST) codes. We also propose a modified design criterion, the average union bound (AUB), which ensures good performance at medium SNR. For a 2 times 2 system operating at 6 b/s/Hz, improvements of more than 1.5 dB have been observed