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    • 47. 发明授权
    • Methods for cell search in synchronous interference limited channels
    • 同步干扰限制信道中小区搜索的方法
    • US08767708B2
    • 2014-07-01
    • US12981724
    • 2010-12-30
    • Sandeep H. KrishnamurthyColin D. Frank
    • Sandeep H. KrishnamurthyColin D. Frank
    • H04B1/7156H04W56/00
    • H04W56/00H04J11/005H04J11/0093H04W36/0083
    • The cell searcher module (CSM) of a wireless communication device detects that the device is in coverage region of an eNB by processing received signal associated with the primary synchronization (PSCH) and secondary synchronization (SSCH) sequences transmitted by the eNB. The wireless device determines whether candidate SCH signals from candidate neighbor cells are synchronous with SCH sequences from the serving cell by implementing one of three methods. In a first method, the CSM generates a joint estimate of the received power of SSCH sequences corresponding to already detected/identified serving cell and a hypothetical neighbor cell. In a second method, the CSM re-constructs SCH sequences corresponding to already detected cells and subtracts the re-constructed SCH sequences from the received signal to obtain a residual signal with reduced serving cell interference. In a third embodiment, the CSM performs a correlation of estimated channel responses to determine whether the neighbor cell is present.
    • 无线通信设备的小区搜索器模块(CSM)通过处理由eNB发送的主同步(PSCH)和二次同步(SSCH)序列相关联的接收信号来检测设备在eNB的覆盖区域。 无线设备通过实施三种方法之一来确定来自候选相邻小区的候选SCH信号是否与来自服务小区的SCH序列同步。 在第一种方法中,CSM产生与已经检测/识别的服务小区和假想的相邻小区相对应的SSCH序列的接收功率的联合估计。 在第二种方法中,CSM重新构建对应于已经检测到的小区的SCH序列,并从接收信号中减去重构的SCH序列,以获得具有减少的服务小区干扰的残留信号。 在第三实施例中,CSM执行估计的信道响应的相关性,以确定相邻小区是否存在。