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公开(公告)号：US20140177758A1
公开(公告)日：2014-06-26
申请号：US14132372
申请日：2013-12-18
申请人： Ko-Yin Lai , Chun-Chi Su , Chih-Cheng Kuo , Chia-Sheng Peng
发明人： Ko-Yin Lai , Chun-Chi Su , Chih-Cheng Kuo , Chia-Sheng Peng
CPC分类号： H04L7/0016 , H04L1/0036 , H04L7/0278
摘要： A timing recovery apparatus for compensating a sampling frequency offset of an input signal is provided. The timing recovery apparatus includes a timing error corrector configured to generate an output signal according to the input signal and a calibration signal, a gain controller configured to adjust at least one of a signal edge low-frequency error component and a signal edge high-frequency error component of the output signal and accordingly generate an adjusted signal, a timing error detector configured to generate an error signal according to the adjusted signal, and a calibration signal generator coupled to the timing error detector and the timing error corrector, for generating the calibration signal according to the error signal and outputting the calibration signal to the timing error corrector to compensate the sampling frequency offset of the input signal.
摘要翻译： 提供了用于补偿输入信号的采样频率偏移的定时恢复装置。 定时恢复装置包括定时误差校正器，其被配置为根据输入信号和校准信号生成输出信号;增益控制器，被配置为调整信号边缘低频误差分量和信号边缘高频中的至少一个 输出信号的误差分量，并因此产生经调整的信号;定时误差检测器，被配置为根据调整后的信号产生误差信号;以及校准信号发生器，耦合到定时误差检测器和定时误差校正器，用于产生校准 信号，并将校准信号输出到定时误差校正器，以补偿输入信号的采样频率偏移。
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公开(公告)号：US20110311000A1
公开(公告)日：2011-12-22
申请号：US12885120
申请日：2010-09-17
申请人： Yu Tai Chang , Chia Sheng Peng , Shao Ping Hung , Chih Yu Chen
发明人： Yu Tai Chang , Chia Sheng Peng , Shao Ping Hung , Chih Yu Chen
IPC分类号： H04L27/06
CPC分类号： H04L27/22 , H04L25/0224 , H04L2025/03407 , H04W52/0225 , Y02D70/00
摘要： A communication device including a receiving unit and a signal processing module having a simulation unit and a decision unit is provided. The receiving unit receives a first burst of a paging message provided from a base station. Base on a reference burst code and an estimated channel impulse response of the communication channel, the simulation unit generates a simulation burst. The decision unit then determines if the paging message is a dummy message in accordance with the first burst and the simulation burst. The decision unit requests the receiving unit to stop receiving the paging message once the paging message is determined to be a dummy message.
摘要翻译： 提供一种包括接收单元和具有模拟单元和判定单元的信号处理模块的通信设备。 接收单元接收从基站提供的寻呼消息的第一突发。 基于参考突发代码和通信信道的估计信道脉冲响应，模拟单元产生模拟突发。 判定单元然后根据第一个突发和模拟突发确定寻呼消息是否是伪消息。 一旦确定了寻呼消息为虚拟消息，则决定单元请求接收单元停止接收寻呼消息。
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公开(公告)号：US20050216540A1
公开(公告)日：2005-09-29
申请号：US10811450
申请日：2004-03-25
申请人： Kuei-Ann Wen , Chia-Sheng Peng , Yuan-Shin Chuang
发明人： Kuei-Ann Wen , Chia-Sheng Peng , Yuan-Shin Chuang
CPC分类号： G06F7/5446 , G06T3/60
摘要： The CORDIC circuit of this invention comprises a buffer memory to record a plurality or a plurality of group of coordinate values; a phase selector to determine a rotation direction according to values recorded in said buffer memory; a rotation calculator to rotate an input coordinate for a predetermined angle and to calculate resulting coordinate value after such rotation; a rotation counter to count number of rotation being made to said input coordinate; and an angle accumulator to accumulate total rotation angle being made to said input coordinate according to value recorded by said rotation counter. The CORDIC circuit of this invention may further comprise a bit selector to shift bits of said input coordinate.
摘要翻译： 本发明的CORDIC电路包括用于记录多个或多组坐标值的缓冲存储器; 相位选择器，用于根据记录在所述缓冲存储器中的值来确定旋转方向; 旋转计算器，用于将输入坐标旋转预定角度，并且在所述旋转之后计算所得到的坐标值; 旋转计数器，对所述输入坐标进行计数旋转数; 以及角度累加器，根据由所述旋转计数器记录的值累积对所述输入坐标的总旋转角度。 本发明的CORDIC电路还可以包括用于移位所述输入坐标的位的位选择器。
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公开(公告)号：US20050157636A1
公开(公告)日：2005-07-21
申请号：US10745754
申请日：2003-12-27
申请人： Kuei-Ann Wen , Chia-Sheng Peng , Yuan-Shin Chuang
发明人： Kuei-Ann Wen , Chia-Sheng Peng , Yuan-Shin Chuang
CPC分类号： H04L27/2657 , H04L27/261 , H04L27/2675 , H04L27/2695
摘要： A novel and simplified orthogonal frequency division multiplexing (OFDM) equalizer uses a coordinate rotation digital computer (CORDIC) to convert the estimated channel effects from rectangular coordinate to polar coordinate and to compensate the phase error with the same CORDIC circuit of synchronization. The OFDM equalizer comprises: a fast Fourier transformer (FFT), to conduct Fourier transformation to received signals to obtain samples of the received signals; a channel estimation circuit to estimate channel effects of a received signal as transformed by the FFT to generate a channel effect estimation value; a coordinate translator, comprising a CORDIC circuit, to translate the channel estimation value into a polar coordinate value; a pilot extractor, provided downstream to the FFT, to extract pilot signals and to track minor phase offsets of the received signal to synchronize phase of said received signal; a phase rotator to compensate phase of the received signal according to the channel estimation value and the phase tracking estimation value, to generate the real value and imaginary value of the phase compensated signal; and an amplitude adjustment circuit to adjust amplitude of the compensated signal according to the amplitude adjustment value of the channel effect estimation value of the channel estimation circuit. In the present invention, the coordinate translator and the phase rotator use the same CORDIC circuit.
摘要翻译： 一种新颖简化的正交频分复用（OFDM）均衡器使用坐标旋转数字计算机（CORDIC）将估计的信道效应从直角坐标转换为极坐标，并且通过同步的CORDIC电路来补偿相位误差。 OFDM均衡器包括：快速傅立叶变换器（FFT），对接收到的信号进行傅立叶变换以获得接收信号的采样; 用于估计由FFT变换的接收信号的信道效应以产生信道效应估计值的信道估计电路; 包括CORDIC电路的坐标转换器，用于将信道估计值转换为极坐标值; 提供在FFT的下游的导频提取器，以提取导频信号并跟踪接收信号的次相位偏移，以使所述接收信号的相位同步; 相位旋转器，用于根据信道估计值和相位跟踪估计值补偿接收信号的相位，以产生相位补偿信号的实数值和虚数值; 以及幅度调整电路，用于根据信道估计电路的信道效应估计值的幅度调整值来调整补偿信号的幅度。 在本发明中，坐标转换器和相位旋转器使用相同的CORDIC电路。
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公开(公告)号：US08531270B2
公开(公告)日：2013-09-10
申请号：US12885120
申请日：2010-09-17
申请人： Yu Tai Chang , Chia Sheng Peng , Shao Ping Hung , Chih Yu Chen
发明人： Yu Tai Chang , Chia Sheng Peng , Shao Ping Hung , Chih Yu Chen
IPC分类号： G08B5/22
CPC分类号： H04L27/22 , H04L25/0224 , H04L2025/03407 , H04W52/0225 , Y02D70/00
摘要： A communication device including a receiving unit and a signal processing module having a simulation unit and a decision unit is provided. The receiving unit receives a first burst of a paging message provided from a base station. Base on a reference burst code and an estimated channel impulse response of the communication channel, the simulation unit generates a simulation burst. The decision unit then determines if the paging message is a dummy message in accordance with the first burst and the simulation burst. The decision unit requests the receiving unit to stop receiving the paging message once the paging message is determined to be a dummy message.
摘要翻译： 提供一种包括接收单元和具有模拟单元和判定单元的信号处理模块的通信设备。 接收单元接收从基站提供的寻呼消息的第一突发。 基于参考突发代码和通信信道的估计信道脉冲响应，模拟单元产生模拟突发。 判定单元然后根据第一个突发和模拟突发确定寻呼消息是否是伪消息。 一旦确定了寻呼消息为虚拟消息，则决定单元请求接收单元停止接收寻呼消息。
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公开(公告)号：US07423960B2
公开(公告)日：2008-09-09
申请号：US10745754
申请日：2003-12-27
申请人： Kuei-Ann Wen , Chia-Sheng Peng , Yuan-Shin Chuang
发明人： Kuei-Ann Wen , Chia-Sheng Peng , Yuan-Shin Chuang
CPC分类号： H04L27/2657 , H04L27/261 , H04L27/2675 , H04L27/2695
摘要： A novel and simplified orthogonal frequency division multiplexing (OFDM) equalizer uses a coordinate rotation digital computer (CORDIC) to convert the estimated channel effects from rectangular coordinate to polar coordinate and to compensate the phase error with the same CORDIC circuit of synchronization. The OFDM equalizer comprises: a fast Fourier transformer (FFT); a channel estimation circuit; a coordinate translator, comprising a CORDIC circuit, to translate the channel estimation value into a polar coordinate value; a pilot extractor to extract pilot signals and to track minor phase offsets of the received signal to synchronize phase of said received signal; a phase rotator to compensate phase of the received signal according to the channel estimation value and the phase tracking estimation value, to generate the real value and imaginary value of the phase compensated signal; and an amplitude adjustment circuit. The coordinate translator and the phase rotator use the same CORDIC circuit.
摘要翻译： 一种新颖简化的正交频分复用（OFDM）均衡器使用坐标旋转数字计算机（CORDIC）将估计的信道效应从直角坐标转换为极坐标，并且通过同步的CORDIC电路来补偿相位误差。 OFDM均衡器包括：快速傅里叶变换器（FFT）; 信道估计电路; 包括CORDIC电路的坐标转换器，用于将信道估计值转换为极坐标值; 导频提取器，用于提取导频信号并跟踪接收信号的次相位偏移，以使所述接收信号的相位同步; 相位旋转器，用于根据信道估计值和相位跟踪估计值补偿接收信号的相位，以产生相位补偿信号的实数值和虚数值; 和振幅调整电路。 坐标转换器和相位旋转器使用相同的CORDIC电路。
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公开(公告)号：US20120021711A1
公开(公告)日：2012-01-26
申请号：US13096546
申请日：2011-04-28
申请人： Yu-Tai Chang , Chih Yu Chen , Chia Sheng Peng
发明人： Yu-Tai Chang , Chih Yu Chen , Chia Sheng Peng
IPC分类号： H04B17/00
CPC分类号： H04W68/00 , H04L1/0036
摘要： A communication device including a receiving unit and a decision-making unit is provided. The receiving unit receives a first burst in a paging message provided from a base station. After comparing a signal-to-noise ratio to a threshold, the decision-making unit decides, based on the comparison result, the judging mechanism for judging whether the paging message is a dummy paging message. The signal-to-noise ratio is associated with the channel via which the first burst passed.
摘要翻译： 提供了包括接收单元和决策单元的通信设备。 接收单元在从基站提供的寻呼消息中接收第一突发。 在将信噪比与阈值进行比较之后，决策单元基于比较结果来判定寻呼消息是否为虚拟寻呼消息的判断机制。 信噪比与第一个突发通过的信道相关联。
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公开(公告)号：US08750815B2
公开(公告)日：2014-06-10
申请号：US13096546
申请日：2011-04-28
申请人： Yu-Tai Chang , Chih Yu Chen , Chia Sheng Peng
发明人： Yu-Tai Chang , Chih Yu Chen , Chia Sheng Peng
IPC分类号： H04B17/00
CPC分类号： H04W68/00 , H04L1/0036
摘要： A communication device including a receiving unit and a decision-making unit is provided. The receiving unit receives a first burst in a paging message provided from a base station. After comparing a signal-to-noise ratio to a threshold, the decision-making unit decides, based on the comparison result, the judging mechanism for judging whether the paging message is a dummy paging message. The signal-to-noise ratio is associated with the channel via which the first burst passed.
摘要翻译： 提供了包括接收单元和决策单元的通信设备。 接收单元在从基站提供的寻呼消息中接收第一突发。 在将信噪比与阈值进行比较之后，决策单元基于比较结果来判定寻呼消息是否为虚拟寻呼消息的判断机制。 信噪比与第一个突发通过的信道相关联。
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