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    • 1. 发明申请
    • CHANNEL ESTIMATION IN A MULTI-USER MIMO-OFDM SYSTEM IN THE PRESENCE OF USER TERMINAL SYMBOL-SPECIFIC PHASE OFFSETS
    • 在用户终端符号特定相位偏移的情况下,多用户MIMO-OFDM系统中的信道估计
    • WO2012027793A1
    • 2012-03-08
    • PCT/AU2011/001131
    • 2011-09-01
    • COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATIONSUZUKI, HajimePATHIKULANGARA, Joseph AbrahamHUMPHREY, David
    • SUZUKI, HajimePATHIKULANGARA, Joseph AbrahamHUMPHREY, David
    • H04L27/26H04J11/00
    • H04L25/022H04L5/005H04L25/0204H04L25/0228
    • Disclosed is an OFDM wireless communication system comprising an access point, and a plurality of remote user terminals. The access point receives one or more training symbols transmitted by the user terminals, each training symbol comprising pilot symbols associated with phase offset estimation OFDM sub-carriers of said training symbol, the phase offset estimation sub-carriers comprising subsets of sub-carriers associated with respective user terminals, wherein each subset is used exclusively by the associated user terminal during channel estimation, and further symbols associated with channel estimation OFDM sub-carriers of said training symbol, wherein the channel estimation sub-carriers are used by all user terminals. The access point estimates, for each user terminal, symbol-specific phase offsets specific to the user terminal using the received pilot symbols associated with the user specific subset of the phase offset estimation sub-carriers; and estimates the uplink channel using the user-terminal-symbol-specific phase offset estimates and the received further symbols.
    • 公开了一种包括接入点和多个远程用户终端的OFDM无线通信系统。 所述接入点接收用户终端发送的一个或多个训练符号,每个训练符号包括与所述训练符号的相位偏移估计OFDM子载波相关联的导频符号,所述相位偏移估计子载波包括与子载波关联的子载波子集 相应的用户终端,其中每个子集在信道估计期间由相关联的用户终端专门使用,以及与所述训练符号的信道估计OFDM子载波相关联的其他符号,其中,所有用户终端使用信道估计子载波。 接入点针对每个用户终端,使用与相位偏移估计子载波的用户特定子集相关联的接收到的导频符号来估计特定于用户终端的符号特定相位偏移; 并且使用用户终端符号特定的相位偏移估计和所接收的另外的符号来估计上行链路信道。