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    • 1. 发明申请
    • PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, AND MIMO RECEPTION DEVICE
    • 导频传输方法,MIMO传输设备和MIMO接收设备
    • US20100260284A1
    • 2010-10-14
    • US12742894
    • 2008-12-09
    • Isamu YoshiiAtsushi SumasuTomohiro ImaiHidenori Kayama
    • Isamu YoshiiAtsushi SumasuTomohiro ImaiHidenori Kayama
    • H04L27/00
    • H04B7/0671H04L27/2601H04L27/2607
    • Provided is a MIMO transmission device which can effectively perform a pilot transmission by using a surplus sample generated in a pilot symbol while maintaining the pilot separation accuracy at a reception side. The MIMO transmission device (100) transmits a pilot symbol as follows. That is, in a first pilot transmission symbol section, a transmission section of a pilot signal transmitted from a first transmission antenna is partially overlapped by a pilot transmission section of a second transmission antenna. In a second pilot transmission symbol section, a pilot transmission section of the first transmission antenna is partially overlapped by a pilot transmission section of a third antenna. Among the pilot signals transmitted from the first antenna, the interference portions overlapped by transmission pilot signals from other antennas are different between the first pilot transmission symbol section and the second pilot transmission symbol section.
    • 提供一种MIMO传输装置,其可以通过在导频符号中生成的剩余采样同时在接收侧保持导频分离精度来有效地执行导频发送。 MIMO发送装置(100)如下发送导频符号。 也就是说,在第一导频发送符号部分中,从第一发送天线发送的导频信号的发送部分由第二发送天线的导频发送部分重叠。 在第二导频发送符号部分中,第一发送天线的导频发送部分由第三天线的导频发送部分重叠。 在从第一天线发送的导频信号中,与来自其他天线的发送导频信号重叠的干扰部分在第一导频传输符号部分和第二导频传输符号部分之间是不同的。
    • 5. 发明申请
    • RADIO COMMUNICATION SYSTEM, RADIO BASE STATION DEVICE, AND TRANSMISSION CONTROL METHOD
    • 无线电通信系统,无线基站设备和传输控制方法
    • US20100222003A1
    • 2010-09-02
    • US12678099
    • 2008-09-25
    • Isamu YoshiiAtsushi SumasuTomohiro ImaiNaoya YosokuHidenori Kayama
    • Isamu YoshiiAtsushi SumasuTomohiro ImaiNaoya YosokuHidenori Kayama
    • H04B15/00
    • H04W72/082H04L5/0032H04W52/243H04W72/0413
    • It is possible to provide a transmission control method, a radio communication system, and a radio base station device which can reduce the time required until an inter-cell interference is reduced so as to improve the system throughput. A base station (200) includes: an FFT unit (210) which receives an interference report transmitted by using a common radio resource common to adjacent cells from a plurality of radio terminals (100) existing in different adjacent cells; and an adaptive FFR processing unit (230) which controls adaptive FFR processing in a downstream line of the local cell according to the reception interference report. Thus, by receiving an interference report directly from the radio terminals (100) existing in adjacent cells, it is possible to modify the transmission mode by considering the interference state in the adjacent cells. This eliminates the need of sending a report on a transmission mode modification which has been conventionally sent between adjacent base stations (200). This reduces the signaling required in the system, which improves the system throughput.
    • 可以提供一种传输控制方法,无线电通信系统和无线电基站装置,其可以减少小区间干扰减少所需的时间,从而提高系统吞吐量。 基站(200)包括:FFT单元(210),其接收通过使用来自存在于不同相邻小区中的多个无线终端(100)的相邻小区共用的公共无线资源来发送的干扰报告; 以及根据接收干扰报告来控制本地小区的下游线路中的自适应FFR处理的自适应FFR处理单元(230)。 因此,通过直接从相邻小区中存在的无线终端(100)接收干扰报告,可以通过考虑相邻小区中的干扰状态来修改发送模式。 这消除了发送关于传统上在相邻基站(200)之间发送的传输模式修改的报告的需要。 这减少了系统中所需的信令,这提高了系统吞吐量。
    • 9. 发明申请
    • PILOT TRANSMISSION METHOD, MIMO TRANSMISSION DEVICE, MIMO RECEPTION DEVICE WHICH PERFORMS COMMUNICATION WITH MIMO TRANSMISSION DEVICE
    • 导频传输方法,MIMO传输设备,MIMO接收设备,其利用MIMO传输设备进行通信
    • US20100260235A1
    • 2010-10-14
    • US12746466
    • 2008-12-10
    • Isamu YoshiiAtsushi SumasuTomohiro ImaiHidenori Kayama
    • Isamu YoshiiAtsushi SumasuTomohiro ImaiHidenori Kayama
    • H04B1/707
    • H04L5/0048H04B7/0671H04L5/0023H04L23/02H04L25/0226
    • It is possible to provide a novel pilot transmission method which can calculate an accurate channel estimation value, a MIMO transmission device using the pilot transmission method, and a MIMO reception device which performs communication with the MIMO transmission device. The MIMO transmission device (100) includes a cyclic shift processing unit (150) which cyclically shifts a first pilot signal sequence spread by a spread code 1 and second pilot signal sequence spread by a spread code 2 with different shift amounts. The first pilot signal sequence and the second pilot signal sequence which have been cyclically shifted are transmitted from different transmitting antennas at the same pilot transmission symbol section. Thus, by changing the shift amount of the cyclic shift process executed on each pilot signal sequence spread by the respective spread codes, it is possible to improve the pilot separation accuracy at a reception side. This enables more accurate calculation of a channel estimation value.
    • 可以提供一种可以计算准确的信道估计值的新型导频传输方法,使用导频传输方法的MIMO传输装置,以及与MIMO传输装置进行通信的MIMO接收装置。 MIMO传输装置(100)包括循环移位处理单元(150),循环移位处理单元(150),循环移位由扩频码扩展的第一导频信号序列和以扩频码扩展的第二导频信号序列。 已经循环移位的第一导频信号序列和第二导频信号序列在相同的导频传输符号部分从不同的发射天线发射。 因此,通过改变对各扩频码扩频的每个导频信号序列执行的循环移位处理的移位量,可以提高接收端的导频分离精度。 这使得能够更准确地计算信道估计值。