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41. 发明申请

US20080002645A1 Radio transmission apparatus and method of inserting guard interval 有权
标题翻译：无线传输装置和插入保护间隔的方法
公开(公告)号：US20080002645A1
公开(公告)日：2008-01-03
申请号：US11600824
申请日：2006-11-17
申请人： Hiroyuki Seki , Daisuke Jitsukawa
发明人： Hiroyuki Seki , Daisuke Jitsukawa
IPC分类号： H04Q7/24
CPC分类号： H04L27/2607 , H04L25/03834 , H04L27/2626
摘要： A radio transmission apparatus includes: a guard interval insertion unit that inserts a guard interval in every data block of a transmission data signal; a waveform shaping unit that performs a signal attenuation processing in a time period that includes a boundary of a signal block in which the guard interval has been inserted; and a controller that controls an insertion period of the guard interval by the guard interval insertion unit such that the data block is located in a time period exclusive of the time period which is a signal attenuation period by the waveform shaping unit. By this, in an environment where a signal to which a window function (band limitation) is applied may be received, while the guard intervals are effectively utilized, degradation of reception characteristics due to influence of the band limitation is prevented.
摘要翻译：无线发送装置包括：保护间隔插入单元，其在发送数据信号的每个数据块中插入保护间隔; 波形整形单元，其在包括保护间隔被插入的信号块的边界的时间段内执行信号衰减处理; 以及控制器，其通过所述保护间隔插入单元控制所述保护间隔的插入期间，使得所述数据块位于与所述波形整形单元的作为信号衰减期间的时间段不同的时间段内。由此，在可以接收施加了窗口功能（频带限制）的信号的环境中，在有效地利用了保护间隔的同时，防止了由频带限制引起的接收特性的劣化。

42. 发明申请

US20050014474A1 Transmission diversity communication system 审中-公开
标题翻译：传输分集通信系统
公开(公告)号：US20050014474A1
公开(公告)日：2005-01-20
申请号：US10859743
申请日：2004-05-28
申请人： Daisuke Jitsukawa , Hiroyuki Seki
发明人： Daisuke Jitsukawa , Hiroyuki Seki
IPC分类号： H04B7/00 , H04B7/06 , H03C7/02
CPC分类号： H04B7/0634 , H04B7/00 , Y02D70/21 , Y02D70/44 , Y02D70/444
摘要： Provided is a mobile cellular communication system or, more particularly, a transmission diversity communication system in which when the number of transmitting antennas is increased, antennas can be calibrated readily and efficiently with power saved without degradation of the characteristic concerning fading. The transmission diversity communication system is a closed-loop transmission diversity communication system. In the transmission diversity communication system, a base station transmits common pilot signals via a plurality of antennas, and a mobile station receives the common pilot signals. The mobile station transmits feedback signals, which are produced through analysis of the common pilot signals, to the base station. The base station controls a downward transmission signal on the basis of the pieces of feedback information. Herein, the plurality of antennas is divided into a plurality of groups. The common pilot signal is transmitted via a reference antenna included in each of the groups. The common pilot signal is alternately transmitted at a low frequency via the other antennas.
摘要翻译：更具体地说，提供了一种移动蜂窝通信系统，更具体地说，在发送天线数量增加的情况下，能够在功率节省的情况下容易且有效地校准天线，而不降低与衰落相关的特性的发送分集通信系统。传输分集通信系统是闭环传输分集通信系统。在发送分集通信系统中，基站经由多个天线发送公共导频信号，移动站接收公共导频信号。移动台通过公共导频信号的分析产生反馈信号到基站。基站根据这些反馈信息控制向下的发送信号。这里，多个天线被分成多个组。公共导频信号经由包括在每个组中的参考天线发送。公共导频信号经由其它天线以低频交替发送。

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