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    • 2. 发明授权
    • Time division duplex orthogonal frequency division multiplexing distributed antenna system, base station and remote access unit
    • 时分双工正交频分复用分布式天线系统,基站和远程接入单元
    • US08942143B2
    • 2015-01-27
    • US13295266
    • 2011-11-14
    • Chingwo MaI-Chou ChungShih-i ChenChi-Hsien Kao
    • Chingwo MaI-Chou ChungShih-i ChenChi-Hsien Kao
    • H04J3/00H04B7/02H04L5/14H04L27/26
    • H04B7/024H04L5/14H04L27/2601
    • A time division duplex orthogonal frequency division multiplexing (TDD-OFDM) distributed antenna system (DAS), a base station and a remote access unit for the same are provided. The base station performs an inverse fast Fourier transform on a user downlink signal, a transmitting/receiving enable signal and an input control signal to generate a first OFDM signal. The user downlink signal is carried on a used subcarrier set of the first OFDM signal, while the transmitting/receiving enable signal and the input control signal are carried on a guard band subcarrier set of the first OFDM signal. The remote access unit receives the first OFDM signal via a fiber transmission line, switches between a transmitting mode and a receiving mode periodically, performs a clock synchronization with the base station according to the transmitting/receiving enable signal, and performs a system configuration according to the input control signal.
    • 提供了时分双工正交频分复用(TDD-OFDM)分布式天线系统(DAS),基站和用于其的远程接入单元。 基站对用户下行链路信号,发送/接收使能信号和输入控制信号执行快速傅立叶逆变换,以产生第一OFDM信号。 用户下行链路信号在第一OFDM信号的使用子载波集合上承载,而发送/接收使能信号和输入控制信号被携带在第一OFDM信号的保护带子载波集合上。 远程接入单元通过光纤传输线接收第一OFDM信号,周期性地在发送模式和接收模式之间切换,根据发送/接收使能信号与基站进行时钟同步,根据发送/接收使能信号执行系统配置 输入控制信号。
    • 3. 发明申请
    • TIME DIVISION DUPLEX ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING DISTRIBUTED ANTENNA SYSTEM, BASE STATION AND REMOTE ACCESS UNIT
    • 时分双工正交频分多路复用分布式天线系统,基站和远程接入单元
    • US20130083705A1
    • 2013-04-04
    • US13295266
    • 2011-11-14
    • Chingwo MaI-Chou ChungShih-i ChenChi-Hsien Kao
    • Chingwo MaI-Chou ChungShih-i ChenChi-Hsien Kao
    • H04J3/00H04W72/04
    • H04B7/024H04L5/14H04L27/2601
    • A time division duplex orthogonal frequency division multiplexing (TDD-OFDM) distributed antenna system (DAS), a base station and a remote access unit for the same are provided. The base station performs an inverse fast Fourier transform on a user downlink signal, a transmitting/receiving enable signal and an input control signal to generate a first OFDM signal. The user downlink signal is carried on a used subcarrier set of the first OFDM signal, while the transmitting/receiving enable signal and the input control signal are carried on a guard band subcarrier set of the first OFDM signal. The remote access unit receives the first OFDM signal via a fiber transmission line, switches between a transmitting mode and a receiving mode periodically, performs a clock synchronization with the base station according to the transmitting/receiving enable signal, and performs a system configuration according to the input control signal.
    • 提供了时分双工正交频分复用(TDD-OFDM)分布式天线系统(DAS),基站和用于其的远程接入单元。 基站对用户下行链路信号,发送/接收使能信号和输入控制信号执行快速傅立叶逆变换,以产生第一OFDM信号。 用户下行链路信号在第一OFDM信号的使用子载波集合上承载,而发送/接收使能信号和输入控制信号被携带在第一OFDM信号的保护带子载波集合上。 远程接入单元通过光纤传输线接收第一OFDM信号,周期性地在发送模式和接收模式之间切换,根据发送/接收使能信号与基站进行时钟同步,根据发送/接收使能信号执行系统配置 输入控制信号。