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    • 9. 发明授权
    • Transmission diversity for a CDMA/TDD mobile telecommunication system
    • CDMA / TDD移动电信系统的传输分集
    • US5598404A
    • 1997-01-28
    • US388416
    • 1995-02-14
    • Masaki HayashiKazuyuki MiyaOsamu Kato
    • Masaki HayashiKazuyuki MiyaOsamu Kato
    • H04W16/28H04B1/707H04B1/7115H04B7/04H04B7/06H04B7/08H04B7/26H04J13/00H04J13/04H04L5/14
    • H04B7/04H04B7/0608H04B7/2618
    • In a base station which has a plurality of antennas, each of a plurality of comparison circuits operates to compare correlation levels, which are obtained by despreading received signals for a plurality of channels, with each other with respect to the antennas. Each of a plurality of transmission antenna selecting circuits operates to determine from which antenna a transmission signal is to be transmitted for every channel. Each of a plurality of multiplexing circuits operates to multiplex the transmission signals of the individual channels, which are spread, for every antenna. As a result, on the basis of the result of the comparison of the correlation levels with respect to the antennas, a transmission antenna is selected for every channel, and the signals of the channels that are to be transmitted by a given antenna are multiplexed, whereby the base station achieves transmission diversity.
    • 在具有多个天线的基站中,多个比较电路中的每一个用于比较通过解扩多个信道的接收信号而获得的相关电平相对于天线的相互关系。 多个发送天线选择电路中的每一个操作以确定每个信道将从哪个天线发送一个发送信号。 多个复用电路中的每一个都对每个天线进行多路复用各个信道的传播信号,这些信道是扩展的。 结果,基于相对于天线的相关电平的比较的结果,为每个信道选择发送天线,并且由给定天线发送的信道的信号被多路复用, 从而基站实现了传输分集。