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2. 发明申请

US20110158358A1 System for selecting a sample phase based on channel capacity 审中-公开
标题翻译：基于通道容量选择采样相位的系统
公开(公告)号：US20110158358A1
公开(公告)日：2011-06-30
申请号：US12926016
申请日：2010-10-21
申请人： Chun-Chieh TSENG , Guo-Li LAI , Liang-Ying CHEN
发明人： Chun-Chieh TSENG , Guo-Li LAI , Liang-Ying CHEN
IPC分类号： H04L27/06
CPC分类号： H04L27/2655 , H04L25/0212 , H04L25/0232 , H04L25/03292 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L2025/03414 , H04L2027/0067
摘要： The present invention provides a system for selecting a sample phase based on channel capacity. A synchronizer calculates a carrier frequency offset, a sample timing offset, a sampling conversion rate and a frame timing, and counts the candidate sample phases. A digital mixer conducts frequency offset compensation to produce a frequency compensated baseband signal. An interpolator conducts interpolation to compensate and produce an interpolated baseband signal. A digital matched filter performs filtering to produce an over-sampled and filtered baseband signal. A buffer stores the over-sampled and filtered baseband signal. A channel estimator estimates and produces channel frequency responses. A sample phase selector calculates channel capacity corresponding to each candidate sample phase, and selects the one with maximum channel capacity. A down-sampler conducts down-sampling operation to produce the final symbol rate based baseband signal. As such, symbol synchronization can be achieved with enhanced performance.
摘要翻译：本发明提供一种基于信道容量来选择采样相位的系统。同步器计算载波频率偏移，采样定时偏移，采样转换速率和帧定时，并对候选采样相位进行计数。数字混频器进行频偏补偿以产生频率补偿基带信号。内插器进行插值以补偿并产生内插的基带信号。数字匹配滤波器执行滤波以产生过采样和滤波的基带信号。缓冲器存储过采样和滤波的基带信号。信道估计器估计并产生信道频率响应。采样相位选择器计算对应于每个候选采样相位的信道容量，并选择具有最大信道容量的信道容量。下采样器进行下采样操作以产生基于符号速率的最终基带信号。因此，可以通过增强的性能来实现符号同步。

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