C. Withers, S. Nadarajah
{"title":"MIMO系统的互易性","authors":"C. Withers, S. Nadarajah","doi":"10.1002/ett.1476","DOIUrl":null,"url":null,"abstract":"We give reciprocity results for the channel capacity efficiency (i.e. the capacity/bandwidth – abbreviated here to capacity) of an N-transmit M-receive antenna wireless system, when the gain matrix is known to the receiver but not the transmitter. The channel may be non-Gaussian. Transmitter power or receiver noise may be variable. We consider the case when N or M is large but not both. \n \n \n \nFormulas are also given for the mean capacity when there is correlation at both ends. Capacity is approximately Gaussian. For a non-Gaussian channel the approximate mean capacity is not changed but the variance is increased by a certain factor. It is noted that reciprocity fails. The key to making it work is to introduce a ‘power factor’ that allows for the case when the power of each transmitter does not depend on N as well as for the usual case when the total power is fixed. Copyright © 2011 John Wiley & Sons, Ltd.","PeriodicalId":50473,"journal":{"name":"European Transactions on Telecommunications","volume":"2 1","pages":"276-281"},"PeriodicalIF":0.0000,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"Reciprocity for MIMO systems\",\"authors\":\"C. Withers, S. Nadarajah\",\"doi\":\"10.1002/ett.1476\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We give reciprocity results for the channel capacity efficiency (i.e. the capacity/bandwidth – abbreviated here to capacity) of an N-transmit M-receive antenna wireless system, when the gain matrix is known to the receiver but not the transmitter. The channel may be non-Gaussian. Transmitter power or receiver noise may be variable. We consider the case when N or M is large but not both. \\n \\n \\n \\nFormulas are also given for the mean capacity when there is correlation at both ends. Capacity is approximately Gaussian. For a non-Gaussian channel the approximate mean capacity is not changed but the variance is increased by a certain factor. It is noted that reciprocity fails. The key to making it work is to introduce a ‘power factor’ that allows for the case when the power of each transmitter does not depend on N as well as for the usual case when the total power is fixed. Copyright © 2011 John Wiley & Sons, Ltd.\",\"PeriodicalId\":50473,\"journal\":{\"name\":\"European Transactions on Telecommunications\",\"volume\":\"2 1\",\"pages\":\"276-281\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2011-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"European Transactions on Telecommunications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/ett.1476\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Transactions on Telecommunications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/ett.1476","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6