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    • 1. 发明授权
    • Apparatus and method for determining coefficient of an equalizer
    • 用于确定均衡器系数的装置和方法
    • US07792184B2
    • 2010-09-07
    • US10423234
    • 2003-04-24
    • John E. SmeeHaitao Zhang
    • John E. SmeeHaitao Zhang
    • H04B13/02
    • H04L25/0314H04L25/03159
    • The linear equalizer (LE) coefficients for code-division-multiplexed (CDM) pilot systems can be determined based upon frequency-domain calculations involving channel impulse responses. A channel impulse response can be formed at the mobile terminal by suitably filtering and despreading the received baseband signal with respect to the pilot Walsh channel. The channel frequency response is then determined based on the fast Fourier transform (FFT) of the channel impulse response. Frequency-domain equalizer coefficients can be determined from the channel frequency response. The frequency-domain equalizer coefficient can be utilized to determine time-domain equalizer coefficients to implement the equalizer in time domain, or be utilized to implement the equalizer in frequency domain.
    • 用于码分复用(CDM)导频系统的线性均衡器(LE)系数可以基于涉及信道脉冲响应的频域计算来确定。 通过适当地对接收的基带信号相对于导频沃尔什信道进行滤波和解扩,可以在移动终端形成信道脉冲响应。 然后,基于信道脉冲响应的快速傅里叶变换(FFT)来确定信道频率响应。 可以从信道频率响应确定频域均衡器系数。 可以利用频域均衡器系数来确定时域均衡器系数以在时域中实现均衡器,或者用于在频域中实现均衡器。
    • 2. 发明授权
    • Slicer input and feedback filter contents for block coded digital communications
    • 切片器输入和反馈滤波器内容用于块编码数字通信
    • US07342952B2
    • 2008-03-11
    • US10602508
    • 2003-06-24
    • John E. SmeeHaitao Zhang
    • John E. SmeeHaitao Zhang
    • H04B1/00
    • H04L25/03063H04L25/03171
    • Improved decision directed adaptation and decision feedback equalizers are provided in a block coded digital communication system. The performance of a receiver is significantly improved by allowing the decision feedback equalizer to perform time-tracking and residual frequency offset compensation during the data portion of a frame. This is accomplished by capitalizing on the inherent correlation among the chips of a code word in a block coded digital communication system to identify certain instances where more reliable symbol estimates can be derived from a sliced chip without introduction the delay inherent in decoding. As the more reliable symbol estimates are fed back into the chip slicer, the total efficiency of the decision feedback equalizer is improved and the more reliable symbol estimates can be used to replace older content in the feedback filter to further improve the accuracy of the modified slicer input and further decrease the effects of error propagation by the decision feedback equalizer.
    • 在块编码的数字通信系统中提供了改进的决策定向适配和判决反馈均衡器。 通过允许判决反馈均衡器在帧的数据部分期间执行时间跟踪和残余频率偏移补偿,显着地改善了接收机的性能。 这通过利用块编码的数字通信系统中的码字的码片之间的固有相关性来实现,以识别某些情况,其中可以从切片的码片导出更可靠的符号估计,而不引入解码中固有的延迟。 随着更可靠的符号估计被反馈到芯片分片器中,改进了决策反馈均衡器的总效率,并且可以使用更可靠的符号估计来代替反馈滤波器中的较旧内容,以进一步提高修改的分片器的精度 输入并进一步降低判决反馈均衡器误差传播的影响。
    • 3. 发明授权
    • Slicer input and feedback filter contents for block coded digital communications
    • 切片器输入和反馈滤波器内容用于块编码数字通信
    • US08290025B2
    • 2012-10-16
    • US12032544
    • 2008-02-15
    • John E. SmeeHaitao Zhang
    • John E. SmeeHaitao Zhang
    • H04B1/00
    • H04L25/03063H04L25/03171
    • Improved decision directed adaptation and decision feedback equalizers are provided in a block coded digital communication system. The performance of a receiver is significantly improved by allowing the decision feedback equalizer to perform time-tracking and residual frequency offset compensation during the data portion of a frame. This is accomplished by capitalizing on the inherent correlation among the chips of a code word in a block coded digital communication system to identify certain instances where more reliable symbol estimates can be derived from a sliced chip without introduction the delay inherent in decoding. As the more reliable symbol estimates are fed back into the chip slicer, the total efficiency of the decision feedback equalizer is improved and the more reliable symbol estimates can be used to replace older content in the feedback filter to further improve the accuracy of the modified slicer input and further decrease the effects of error propagation by the decision feedback equalizer.
    • 在块编码的数字通信系统中提供了改进的决策定向适配和判决反馈均衡器。 通过允许判决反馈均衡器在帧的数据部分期间执行时间跟踪和残余频率偏移补偿,显着地改善了接收机的性能。 这通过利用块编码的数字通信系统中的码字的码片之间的固有相关性来实现,以识别某些情况,其中可以从切片的码片导出更可靠的符号估计,而不引入解码中固有的延迟。 随着更可靠的符号估计被反馈到芯片分片器中,改进了决策反馈均衡器的总效率,并且可以使用更可靠的符号估计来代替反馈滤波器中的较旧内容,以进一步提高修改的分片器的精度 输入并进一步降低判决反馈均衡器误差传播的影响。
    • 4. 发明申请
    • SLICER INPUT AND FEEDBACK FILTER CONTENTS FOR BLOCK CODED DIGITAL COMMUNICATIONS
    • 块编码数字通信的SLICER输入和反馈滤波器
    • US20080285641A1
    • 2008-11-20
    • US12032544
    • 2008-02-15
    • John E. SmeeHaitao Zhang
    • John E. SmeeHaitao Zhang
    • H04L27/01H04B1/10
    • H04L25/03063H04L25/03171
    • Improved decision directed adaptation and decision feedback equalizers are provided in a block coded digital communication system. The performance of a receiver is significantly improved by allowing the decision feedback equalizer to perform time-tracking and residual frequency offset compensation during the data portion of a frame. This is accomplished by capitalizing on the inherent correlation among the chips of a code word in a block coded digital communication system to identify certain instances where more reliable symbol estimates can be derived from a sliced chip without introduction the delay inherent in decoding. As the more reliable symbol estimates are fed back into the chip slicer, the total efficiency of the decision feedback equalizer is improved and the more reliable symbol estimates can be used to replace older content in the feedback filter to further improve the accuracy of the modified slicer input and further decrease the effects of error propagation by the decision feedback equalizer.
    • 在块编码的数字通信系统中提供了改进的决策定向适配和判决反馈均衡器。 通过允许判决反馈均衡器在帧的数据部分期间执行时间跟踪和残余频率偏移补偿,显着地改善了接收机的性能。 这通过利用块编码的数字通信系统中的码字的码片之间的固有相关性来实现,以识别某些情况,其中可以从切片的码片导出更可靠的符号估计,而不引入解码中固有的延迟。 随着更可靠的符号估计被反馈到芯片分片器中,改进了决策反馈均衡器的总效率,并且可以使用更可靠的符号估计来代替反馈滤波器中的较旧内容,以进一步提高修改的分片器的精度 输入并进一步降低判决反馈均衡器误差传播的影响。