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    • 92. 发明申请
    • Blind synchronization and demodulation
    • 盲同步和解调
    • US20060083319A1
    • 2006-04-20
    • US11243454
    • 2005-10-04
    • Georgios GiannakisXiliang Luo
    • Georgios GiannakisXiliang Luo
    • H04L27/00
    • H04L25/03834H04B1/7183H04L7/007H04L7/08H04L7/10
    • Techniques are described that provide inter-symbol interference—(ISI) and multi-user interference—(MUI) resilient blind timing synchronization and low complexity demodulation in wireless communication systems. A nonzero mean symbol is transmitted with a predetermined period in a stream of zero mean symbols during a synchronization phase. Only nonzero mean symbols are transmitted outside of the synchronization phase. Blind or non-data aided synchronization is performed at the receiver while bypassing channel estimation. The techniques enable timing synchronization via energy detection and low-complexity demodulation by matching the received waveform to a synchronized aggregate template (SAT). The SAT is recovered by averaging samples of the received waveform during the synchronization phase. In this manner, the described techniques may be applied to single or multi-user narrowband, wideband, or ultra-wideband (UWB) wireless communication systems with fixed or ad hoc access, but are particularly advantageous for wideband or UWB multi-user ad hoc access.
    • 描述了在无线通信系统中提供符号间干扰(ISI)和多用户干扰(MUI)弹性盲定时同步和低复杂度解调的技术。 在同步阶段期间以零个平均符号的流以预定周期发送非零均值符号。 只有非零平均符号在同步阶段之外传输。 在旁路信道估计的同时,在接收机执行盲目或非数据辅助同步。 这些技术通过将接收到的波形与同步的聚合模板(SAT)进行匹配,通过能量检测和低复杂度解调实现定时同步。 通过在同步阶段平均接收波形的采样来恢复SAT。 以这种方式,所描述的技术可以应用于具有固定或自组织接入的单用户或多用户窄带,宽带或超宽带(UWB)无线通信系统,但是对于宽带或UWB多用户特定 访问。
    • 95. 发明授权
    • Transmission of reference signal on non-contiguous clusters of resources
    • 在不连续的资源集群上传输参考信号
    • US09288026B2
    • 2016-03-15
    • US12816929
    • 2010-06-16
    • Xiaoxia ZhangWanshi ChenXiliang LuoJuan MontojoPeter Gaal
    • Xiaoxia ZhangWanshi ChenXiliang LuoJuan MontojoPeter Gaal
    • H04L5/00H04J13/00H04L27/26
    • H04L5/0051H04J13/0062H04L5/0016H04L5/0023H04L5/0041H04L27/2613
    • A reference signal is transmitted on multiple non-contiguous clusters of resources. A user equipment (UE) may be scheduled for data transmission on the multiple non-contiguous clusters, and each cluster may cover a set of contiguous subcarriers. The UE may generate the reference signal based on at least one reference signal (RS) sequence using code division multiplexing (CDM) or frequency division multiplexing (FDM). In a design, the UE generates the reference signal with CDM based on a single RS sequence having a length matching the total length of the multiple non-contiguous clusters. In another design, the UE generates the reference signal with CDM based on one RS sequence for each cluster. In yet another design, the UE generates the reference signal with FDM and transmits the reference signal on a subset of all subcarriers for the multiple non-contiguous clusters.
    • 参考信号在多个不连续的资源簇上传输。 可以调度用户设备(UE)以在多个不连续的群集上进行数据传输,并且每个群集可以覆盖一组连续的子载波。 UE可以使用码分复用(CDM)或频分复用(FDM),基于至少一个参考信号(RS)序列生成参考信号。 在设计中,UE基于具有与多个不连续簇的总长度匹配的长度的单个RS序列,用CDM生成参考信号。 在另一种设计中,UE根据每个簇的一个RS序列产生具有CDM的参考信号。 在又一设计中,UE使用FDM生成参考信号,并且在多个非连续簇的所有子载波的子集上发送参考信号。