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    • 1. 发明申请
    • ITERATIVE CHANNEL AND INTERFERENCE ESTIMATION AND DECODING
    • 迭代通道和干扰估计与解码
    • WO2005086440A1
    • 2005-09-15
    • PCT/US2005/005907
    • 2005-02-25
    • QUALCOMM IncorporatedKHANDEKAR, AamodAGRAWAL, AvneeshLING, Fuyun
    • KHANDEKAR, AamodAGRAWAL, AvneeshLING, Fuyun
    • H04L25/03
    • H04L1/005H04L1/0071H04L25/0238H04L25/03171
    • For an iterative channel and interference estimation and decoding scheme, prior information for channel gain and interference is initially obtained based on received pilot symbols. Forward information for code bits corresponding to received data symbols is derived based on the received data symbols and the prior information and then decoded to obtain feedback information for the code bits corresponding to the received data symbols. A posteriori information for channel gain and interference for each received data symbol is derived based on the feedback information for that received data symbol. The a posteriori information for the received data symbols and the prior information are combined to obtain updated information for channel gain and interference for each received data symbol. The process can be repeated for any number of iterations. The prior, a posteriori , and updated information may be represented by joint probability distributions on channel gain and interference. The forward and feedback information may be represented by log-likelihood ratios.
    • 对于迭代信道和干扰估计和解码方案,首先基于接收到的导频符号获得用于信道增益和干扰的先验信息。 基于接收到的数据符号和先验信息导出与接收到的数据符号相对应的码位的转发信息,然后解码,以获得与接收到的数据符号对应的码位的反馈信息。 基于该接收到的数据符号的反馈信息导出每个接收到的数据符号的信道增益和干扰的后验信息。 组合接收到的数据符号和先验信息的后验信息以获得每个接收到的数据符号的信道增益和干扰的更新信息。 该过程可以重复任意次数的迭代。 先前的,后验的和更新的信息可以由通道增益和干扰的联合概率分布来表示。 正向和反馈信息可以由对数似然比表示。