{"title":"无线的挑战","authors":"F. Adachi","doi":"10.1109/iwsda.2009.5346429","DOIUrl":null,"url":null,"abstract":"Broadband wireless technology which allows higher-than-1Gbps data transmission with extremely low transmit power may be necessary in future wireless communication systems. The wireless channel for such broadband transmissions is severely frequency-selective. Frequency-domain wireless signal processing may play an important role in achieving a good signal transmission performance. The multi-carrier (MC) multi-access technique, including OFDMA and MC-CDMA, has been gaining popularity. Meanwhile, it has been shown that the use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion improves the transmission performance of single-carrier (SC) multi-access, including DS-CDMA. This suggests that either SC- or MC-based multi-access technique with FDE can be used. Unfortunately, the available wireless bandwidth is limited while a higher-than-1Gbps transmission is demanded. Particular attention has been paid to multi-input/multi-output (MIMO) multiplexing (SDM) to significantly increase the throughput without expanding the signal bandwidth. Besides the broadband wireless signal processing, another practically important issue exists, which is a significant reduction of transmit power. Applying wireless multi-hop technique or distributed antenna technique is a possible solution to this issue. In this talk, we will overview the state-of-the-art broadband wireless technology.","PeriodicalId":120760,"journal":{"name":"2009 Fourth International Workshop on Signal Design and its Applications in Communications","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Wireless challenge\",\"authors\":\"F. Adachi\",\"doi\":\"10.1109/iwsda.2009.5346429\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Broadband wireless technology which allows higher-than-1Gbps data transmission with extremely low transmit power may be necessary in future wireless communication systems. The wireless channel for such broadband transmissions is severely frequency-selective. Frequency-domain wireless signal processing may play an important role in achieving a good signal transmission performance. The multi-carrier (MC) multi-access technique, including OFDMA and MC-CDMA, has been gaining popularity. Meanwhile, it has been shown that the use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion improves the transmission performance of single-carrier (SC) multi-access, including DS-CDMA. This suggests that either SC- or MC-based multi-access technique with FDE can be used. Unfortunately, the available wireless bandwidth is limited while a higher-than-1Gbps transmission is demanded. Particular attention has been paid to multi-input/multi-output (MIMO) multiplexing (SDM) to significantly increase the throughput without expanding the signal bandwidth. Besides the broadband wireless signal processing, another practically important issue exists, which is a significant reduction of transmit power. Applying wireless multi-hop technique or distributed antenna technique is a possible solution to this issue. In this talk, we will overview the state-of-the-art broadband wireless technology.\",\"PeriodicalId\":120760,\"journal\":{\"name\":\"2009 Fourth International Workshop on Signal Design and its Applications in Communications\",\"volume\":\"2016 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2009 Fourth International Workshop on Signal Design and its Applications in Communications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/iwsda.2009.5346429\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 Fourth International Workshop on Signal Design and its Applications in Communications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/iwsda.2009.5346429","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Broadband wireless technology which allows higher-than-1Gbps data transmission with extremely low transmit power may be necessary in future wireless communication systems. The wireless channel for such broadband transmissions is severely frequency-selective. Frequency-domain wireless signal processing may play an important role in achieving a good signal transmission performance. The multi-carrier (MC) multi-access technique, including OFDMA and MC-CDMA, has been gaining popularity. Meanwhile, it has been shown that the use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion improves the transmission performance of single-carrier (SC) multi-access, including DS-CDMA. This suggests that either SC- or MC-based multi-access technique with FDE can be used. Unfortunately, the available wireless bandwidth is limited while a higher-than-1Gbps transmission is demanded. Particular attention has been paid to multi-input/multi-output (MIMO) multiplexing (SDM) to significantly increase the throughput without expanding the signal bandwidth. Besides the broadband wireless signal processing, another practically important issue exists, which is a significant reduction of transmit power. Applying wireless multi-hop technique or distributed antenna technique is a possible solution to this issue. In this talk, we will overview the state-of-the-art broadband wireless technology.