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    • 25. 发明申请
    • METHOD AND APPARATUS FOR COMPRESSING CHANNEL STATE INFORMATION BASED ON PATH LOCATION INFORMATION
    • 基于路径位置信息压缩信道状态信息的方法和装置
    • US20130201912A1
    • 2013-08-08
    • US13698927
    • 2011-05-18
    • Hongsan ShengYingxue K. LiPhilip J. PietraskiCarl WangRon Porat
    • Hongsan ShengYingxue K. LiPhilip J. PietraskiCarl WangRon Porat
    • H04W28/20
    • H04W28/20H04B7/0413H04B7/0626H04B7/0634H04B7/065H04B7/0663
    • Methods and apparatus are described for compressing channel state information (CSI) in time-domain based on path location information for CSI feedback. Downlink (DL) CSI is compressed in the time domain and fed back by not sending the multipath location information, or sending at a very low rate. In one method, a wireless transmit/receive unit (WTRU) selects the strongest multipath components based on channel characteristics. The multipath components are quantized in the time domain via direct or vector based quantization. The base station reconstructs a channel impulse response from the fed back quantized multipath components and applies same to precoding processing. In another method, the WTRU feeds back information associated with a narrowband portion(s) of a system spectrum. The selected narrowband portion(s) have sufficient density over time to allow good precoding per subband or across the system spectrum. Short term feedback may be augmented with long term channel information.
    • 描述了用于基于CSI反馈的路径位置信息在时域中压缩信道状态信息(CSI)的方法和装置。 下行链路(DL)CSI在时域中被压缩,并且通过不发送多路径位置信息或以非常低的速率发送来反馈。 在一种方法中,无线发射/接收单元(WTRU)基于信道特性选择最强的多径分量。 多径分量通过直接或矢量量化在时域中量化。 基站从反馈量化多路径分量重构信道脉冲响应,并将其应用于预编码处理。 在另一种方法中,WTRU反馈与系统频谱的窄带部分相关联的信息。 所选择的窄带部分随着时间具有足够的密度,以允许每个子带或跨系统频谱的良好预编码。 短期反馈可能会增加长期渠道信息。