发明授权
- 专利标题: Radio communication system and transmitting apparatus used for the same
- 专利标题(中): 无线电通信系统和用于其的发射装置
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申请号: US12988985申请日: 2009-04-22
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公开(公告)号: US08995540B2公开(公告)日: 2015-03-31
- 发明人: Shimpei To , Minoru Kubota , Yasuhiro Hamaguchi , Osamu Nakamura , Kazunari Yokomakura , Seiichi Sampei , Shinichi Miyamoto , Shinsuke Ibi
- 申请人: Shimpei To , Minoru Kubota , Yasuhiro Hamaguchi , Osamu Nakamura , Kazunari Yokomakura , Seiichi Sampei , Shinichi Miyamoto , Shinsuke Ibi
- 申请人地址: JP Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JP Osaka
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2008-111497 20080422
- 国际申请: PCT/JP2009/058009 WO 20090422
- 国际公布: WO2009/131155 WO 20091029
- 主分类号: H04L27/28
- IPC分类号: H04L27/28 ; H04W72/06 ; H04J11/00 ; H04L5/00 ; H04L25/03
摘要:
To provide a system that can accommodate a greater number of terminals within a limited band and can obtain a higher transmission rate. While the number of frequency signals (spectrums) output in parallel by performing a spread spectrum from the DFT unit of each terminal is 12, the number of sub-carriers constituting one sub-channel is set at 10 or 11. In this case, the users (users A and G) allocated to the sub-channels at both ends of the band will not perform transmission of one frequency signal at the end (one sub-carrier) of all the frequency signals output from the DFT unit, whereas the users (users B to F) allocated to the other sub-channels will not perform transmission of the frequency signals at the ends (two sub-carriers). This transmission can be realized by deleting (clipping) the associated number of signals from both ends or from one end of the frequency signals output from the DFT unit of each terminal and allocating the frequency signals after clipping, to individual sub-channels.