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    • 51. 发明申请
    • Radio communication system
    • 无线通信系统
    • US20070254693A1
    • 2007-11-01
    • US11819410
    • 2007-06-27
    • Hideto Furukawa
    • Hideto Furukawa
    • H04B1/02H04B7/08H04M1/00
    • H04B1/005H04B7/2621H04L27/2602
    • In a radio communication system in which multiple bands or a plurality of different radio frequencies are used, a different radio transmission method is used in each band or at each radio frequency. For example, by transmitting data using radio formats which are different in each band or at each radio frequency, the radio transmission method is made different in each band or at each radio frequency. In order to vary the radio format, (1) the pilot length is varied at each radio frequency; or (2) the pilot interval is varied at each radio frequency; or (3) the guard interval length is varied in each band or at each radio frequency; or (4) when multicarrier modulation is used for radio communication in each band, the subcarrier interval for multicarrier transmission is varied in each band.
    • 在使用多个频带或多个不同射频的无线电通信系统中,在每个频带或每个射频使用不同的无线电传输方法。 例如,通过使用在每个频带或每个射频不同的无线电格式发送数据,使得无线电传输方法在每个频带或每个射频处不同。 为了改变无线电格式,(1)导频长度在每个射频频率下变化; 或(2)导频间隔在每个射频处变化; 或(3)每个频带或每个射频改变保护间隔长度; 或(4)当多载波调制用于每个频带中的无线电通信时,多载波传输的子载波间隔在每个频带中变化。
    • 56. 发明申请
    • Wireless transmitting station and wireless receiving station
    • 无线发射台和无线接收台
    • US20080037409A1
    • 2008-02-14
    • US11783017
    • 2007-04-05
    • Daisuke OgawaTakashi DatekiHideto Furukawa
    • Daisuke OgawaTakashi DatekiHideto Furukawa
    • H04J3/10
    • H04B7/022H04B7/0413H04B7/0691
    • A wireless terminal receives a signal from a first BTS as a communication party and a signal from a second BTS when receiving the signal from the first BTS by using a communication slot that is assigned to the terminal, the terminal comprises receiving antennas; a demodulator unit that estimates channels of received signals, and demodulates the received signals by using the estimation result; and a discriminating unit discriminating the number of transmitting antennas to be used in the first BTS in the communication slot which is assigned to the terminal, in which in the case where the number of channels that are produced between the first BTS and the terminal, which is determined according to the number of transmitting antennas, is smaller than the number of channels that can be estimated by the demodulator unit, the demodulator unit estimates the channel between the terminal and the first BTS by using a signal from the first BTS, and estimates the channel between the terminal and the second BTS by using a signal from the second BTS.
    • 无线终端通过使用分配给终端的通信时隙从第一BTS接收来自第一BTS的信号和来自第二BTS的信号,该终端包括接收天线; 解调器单元,其估计接收信号的信道,并通过使用估计结果解调接收的信号; 以及鉴别单元,鉴别在分配给终端的通信时隙中在第一BTS中要使用的发送天线的数量,其中在第一BTS和终端之间产生的信道的数量, 根据发送天线的数量确定,小于可由解调器单元估计的信道的数量,解调器单元通过使用来自第一BTS的信号估计终端与第一BTS之间的信道,并且估计 通过使用来自第二BTS的信号在终端和第二BTS之间的信道。