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    • 3. 发明申请
    • PROCESSING A CONSTANT AMPLITUDE SEQUENCE FOR TRANSMISSION
    • 处理传输的恒定振幅序列
    • WO2017078607A1
    • 2017-05-11
    • PCT/SE2016/051090
    • 2016-11-04
    • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    • LIN, XingqinSUI, YutaoGRÖVLEN, AsbjörnADHIKARY, AnsumanWANG, Yi-Pin EricJOHANSSON, Niklas
    • H04L25/03H04J13/00H04L27/26
    • H04L25/03834H04J13/0062H04J13/105H04L27/2613H04L27/2614H04L27/2692
    • An apparatus (10) and method (100) for processing a constant amplitude sequence (12) yields a transmission signal (32) exhibiting a low peak to average power ratio, PAPR. The signal (32) may be suitable for transmission (140) in the uplink as a random access preamble or uplink measurement signal for handover assessment. The signal (32) may be suitable for transmission (140) in the downlink as a synchronization signal. The method (100) comprises extending (110) a constant amplitude sequence (12), such as a Zadoff-Chu sequence, by adding to the sequence one or more complex-valued elements that have the same amplitude as other complex-valued elements in the sequence (12). The method (100) also includes upsampling (120) the extended sequence (16) by linearly interpolating a difference in phase between adjacent complex-valued elements in the extended sequence (16). The method (100) further entails limiting (130) a bandwidth of the upsampled sequence (20) by low pass filtering the upsampled sequence (20). The method (100) may also include transmitting (140) the band limited sequence (28). Due to the low PAPR of the transmitted signal (32), a power amplifier, which may be integrated with other circuits in a System-on-Chip, may have a low backoff. This yields high efficiency for the amplifier, hence low power consumption, and hence extended battery life in radio network devices.
    • 用于处理恒定幅度序列(12)的设备(10)和方法(100)产生表现出低峰均功率比PAPR的传输信号(32)。 信号(32)可以适​​合于在上行链路中作为用于切换评估的随机接入前导码或上行链路测量信号的传输(140)。 信号(32)可以适​​合于在下行链路中作为同步信号进行传输(140)。 方法(100)包括通过向序列添加一个或多个复数值元素来扩展(110)诸如Zadoff-Chu序列的恒定幅度序列(12),该复数值元素具有与其他复数值元素 序列(12)。 方法(100)还包括通过对扩展序列(16)中的相邻复数值元素之间的相位差进行线性内插来对扩展序列(16)进行上采样(120)。 方法(100)还需要通过低通滤波上采样序列(20)来限制(130)上采样序列(20)的带宽。 方法(100)还可以包括发送(140)带限制序列(28)。 由于发射信号(32)的低PAPR,可能与片上系统中的其他电路集成的功率放大器可能具有低退避。 这为放大器提供了高效率,因此功耗低,因此延长了无线电网络设备的电池寿命。