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1. 发明授权

US07558338B2 Method and apparatus for I/Q imbalance estimation 有权
标题翻译：用于I / Q不平衡估计的方法和装置
公开(公告)号：US07558338B2
公开(公告)日：2009-07-07
申请号：US10649862
申请日：2003-08-28
申请人： Der-Zheng Liu , Song-Nien Tung , Kuang-Yu Yen , Tai-Cheng Liu
发明人： Der-Zheng Liu , Song-Nien Tung , Kuang-Yu Yen , Tai-Cheng Liu
IPC分类号： H04L27/00
CPC分类号： H03D3/009 , H04B1/40 , H04L27/2627 , H04L27/2649 , H04L2027/0016 , H04L2027/0022
摘要： An apparatus and method for estimating an I/Q imbalance parameter of a receiver and a transmitter. An apparatus for estimating an I/Q imbalance parameter of a receiver, the apparatus comprising: a signal generator; a transmitter; a receiver; and an estimator. An apparatus for estimating an I/Q imbalance parameter of a transmitter, the apparatus comprising: a signal generator; a transmitter; and an estimator.
摘要翻译：一种用于估计接收机和发射机的I / Q不平衡参数的装置和方法。一种用于估计接收机的I / Q不平衡参数的装置，所述装置包括：信号发生器; 发射机接收器和一个估计。一种用于估计发射机的I / Q不平衡参数的装置，所述装置包括：信号发生器; 发射机和一个估计。

2. 发明授权

US07680197B2 Apparatus and method for sampling timing compensation in multi-carrier system 有权
标题翻译：多载波系统采样定时补偿的装置和方法
公开(公告)号：US07680197B2
公开(公告)日：2010-03-16
申请号：US10803047
申请日：2004-03-18
申请人： Der-Zheng Liu , Tai-Cheng Liu , Song-Nien Tung , Kuang-Yu Yen
发明人： Der-Zheng Liu , Tai-Cheng Liu , Song-Nien Tung , Kuang-Yu Yen
IPC分类号： H04K1/10 , H04L7/00
CPC分类号： H04L27/2662 , H04L27/2657 , H04L27/2675
摘要： The present invention provides an apparatus and an associated method for sampling timing compensation, which can estimate sampling frequency offset between the receiver and transmitter of a multi-carrier system according to estimated frequency responses of two consecutive received symbols within each pilot subchannel, and compensate an accumulated sampling timing offset resulted from the sampling frequency offset. When the accumulated timing offset is not large, the apparatus uses a phase rotator to compensate with a corresponding accumulated phase rotation in frequency domain. When the accumulated timing offset is large, the apparatus first compensates with a specific timing offset in time domain, and then uses the phase rotator to compensate with a phase rotation corresponding to the remaining timing offset in frequency domain. A timing controller is used to compensate with the specific timing offset by adjusting a clock generator or a cyclic prefix remover of the receiver.
摘要翻译：本发明提供了一种用于采样定时补偿的装置和相关方法，其可以根据每个导频子信道内的两个连续接收符号的估计频率响应来估计多载波系统的接收机和发射机之间的采样频率偏移，并且对采样频率偏移产生的累积采样定时偏移。当累积的定时偏差不大时，该装置使用相位旋转器来对频域中相应的累积相位旋转进行补偿。当累积的定时偏移量大时，装置首先用时域中的特定定时偏移补偿，然后使用相位旋转器对与频域中的剩余定时偏移相对应的相位旋转进行补偿。定时控制器用于通过调整接收机的时钟发生器或循环前缀去除器来补偿特定的定时偏移。

3. 发明授权

US07684501B2 Apparatus and method for carrier frequency offset and phase compensation in communication system 有权
标题翻译：通信系统中载波频偏和相位补偿的装置和方法
公开(公告)号：US07684501B2
公开(公告)日：2010-03-23
申请号：US10779648
申请日：2004-02-18
申请人： Der-Zheng Liu , Song-Nien Tung , Tai-Cheng Liu , Kuang-Yu Yen
发明人： Der-Zheng Liu , Song-Nien Tung , Tai-Cheng Liu , Kuang-Yu Yen
IPC分类号： H04K1/10
CPC分类号： H04L27/2657 , H04L27/266 , H04L27/2675 , H04L27/2695
摘要： The present invention provides apparatus and methods for carrier frequency offset and phase compensation, which can compensate the phase rotation of an OFDM symbol resulted from carrier frequency offset between the receiver and transmitter of an OFDM System. The apparatus and method for carrier frequency offset compensation generates an estimated carrier frequency offset according to a phase error between estimated frequency responses of two consecutive received OFDM symbols within the pilot subchannel, and calculates an accumulated phase rotation, according to the estimated carrier frequency offset, for compensating the received OFDM symbol. On the other hand, the apparatus and method for phase compensation generates an estimated residual phase error according to the pilot signal of a frequency offset-compensated OFDM symbol and the original pilot signal transmitted by the transmitter, and compensates the frequency offset-compensated OFDM symbol or a following one according to the estimated residual phase error.
摘要翻译：本发明提供了用于载波频率偏移和相位补偿的装置和方法，其可以补偿由OFDM系统的接收机和发射机之间的载波频率偏移导致的OFDM符号的相位旋转。用于载波频率补偿的装置和方法根据导频子信道内的两个连续接收的OFDM符号的估计频率响应之间的相位误差产生估计的载波频率偏移，并且根据所估计的载波频率偏移来计算累积的相位旋转，用于补偿接收到的OFDM符号。另一方面，用于相位补偿的装置和方法根据频偏补偿OFDM符号的导频信号和由发射机发送的原始导频信号产生估计的残余相位误差，并且补偿频偏补偿的OFDM符号或根据估计的残余相位误差的后一个。

4. 发明授权

US07391828B2 Symbol boundary detection device and method for use in OFDM system 有权
标题翻译：符号边界检测装置及其在OFDM系统中的应用
公开(公告)号：US07391828B2
公开(公告)日：2008-06-24
申请号：US10885186
申请日：2004-07-06
申请人： Der-Zheng Liu , Song-Nien Tang , Tai-Cheng Liu , Kuang-Yu Yen
发明人： Der-Zheng Liu , Song-Nien Tang , Tai-Cheng Liu , Kuang-Yu Yen
IPC分类号： H04L27/06
CPC分类号： H04L27/2662 , H04L27/2605 , H04L27/2675 , H04L27/2678
摘要： A symbol boundary detection device and a method thereof for use in a receiver of a multi-channel communication system. The device utilizes a threshold to make an auxiliary judgement so as to select a proper symbol boundary reference point within an early range. The threshold may be flexibly set in response to different characteristics of the systems. In addition, a pilot symbol guard interval matched filter is further utilized to determine whether a pilot symbol guard interval is received.
摘要翻译：一种在多声道通信系统的接收机中使用的符号边界检测装置及其方法。设备利用阈值进行辅助判断，以便在早期范围内选择适当的符号边界参考点。可以响应于系统的不同特性灵活地设置阈值。此外，进一步利用导频符号保护间隔匹配滤波器来确定是否接收到导频符号保护间隔。

5. 发明授权

US07212795B2 Automatic gain control and antenna selection method for a radio communication system 有权
标题翻译：无线电通信系统的自动增益控制和天线选择方法
公开(公告)号：US07212795B2
公开(公告)日：2007-05-01
申请号：US10864193
申请日：2004-06-09
申请人： Der-Zheng Liu , Song-Nien Tang , Tai-Cheng Liu , Kuang-Yu Yen
发明人： Der-Zheng Liu , Song-Nien Tang , Tai-Cheng Liu , Kuang-Yu Yen
IPC分类号： H04B1/06
CPC分类号： H03G3/3052 , H03G2201/206 , H03G2201/302 , H03G2201/305 , H03G2201/307 , H03G2201/502 , H03G2201/508 , H03M1/185 , H04B7/0814
摘要： The invention provides an automatic gain control and antenna selection method used in a receiver of a radio communication system. The received signal power is estimated by digital signal processing after analog-to-digital conversion in the system, in order to adjust the gain of the front end analog signal until the magnitude of the analog signal is adjusted to an optimum range of the digital signal processing. In addition, the ADC is utilized to estimate the signal power as the basis of the antenna selection.
摘要翻译：本发明提供一种在无线电通信系统的接收机中使用的自动增益控制和天线选择方法。接收到的信号功率通过系统中模数转换后的数字信号处理来估计，以便调整前端模拟信号的增益，直到模拟信号的幅度被调整到数字信号的最佳范围处理。此外，ADC用于估计信号功率作为天线选择的基础。

6. 发明申请

US20050008088A1 Symbol boundary detection device and method for use in OFDM system 有权
标题翻译：符号边界检测装置及其在OFDM系统中的应用
公开(公告)号：US20050008088A1
公开(公告)日：2005-01-13
申请号：US10885186
申请日：2004-07-06
申请人： Der-Zheng Liu , Song-Nien Tang , Tai-Cheng Liu , Kuang-Yu Yen
发明人： Der-Zheng Liu , Song-Nien Tang , Tai-Cheng Liu , Kuang-Yu Yen
IPC分类号： H04L27/26 , H04K1/10
CPC分类号： H04L27/2662 , H04L27/2605 , H04L27/2675 , H04L27/2678
摘要： A symbol boundary detection device and a method thereof for use in a receiver of a multi-channel communication system. The device utilizes a threshold to make an auxiliary judgement so as to select a proper symbol boundary reference point within an early range. The threshold may be flexibly set in response to different characteristics of the systems. In addition, a pilot symbol guard interval matched filter is further utilized to determine whether a pilot symbol guard interval is received.
摘要翻译：一种在多声道通信系统的接收机中使用的符号边界检测装置及其方法。设备利用阈值进行辅助判断，以便在早期范围内选择适当的符号边界参考点。可以响应于系统的不同特性灵活地设置阈值。此外，进一步利用导频符号保护间隔匹配滤波器来确定是否接收到导频符号保护间隔。

7. 发明授权

US08284736B2 Apparatus and method for power-saving in multiple antenna communication system 有权
标题翻译：多天线通信系统中省电的装置和方法
公开(公告)号：US08284736B2
公开(公告)日：2012-10-09
申请号：US13346821
申请日：2012-01-10
申请人： Der-Zheng Liu , Chung-Yao Chang , Kuang-Yu Yen
发明人： Der-Zheng Liu , Chung-Yao Chang , Kuang-Yu Yen
IPC分类号： H04W4/00
CPC分类号： H04W52/287 , H04B7/0413
摘要： A multiple-antenna transceiver in the present invention includes a frame controller and circuitry for transmitting and receiving. The transmitting component includes a sequence selection circuit, a MIMO modulation and coding circuit, and numerous TX RFE and AFE circuits. The receiving component includes a MIMO demodulation and decoding circuit, a sequence separation circuit, and numerous RX RFE and AFE circuits. The frame controller can enable and disable the TX and RX RFE and AFE circuits individually so as to reduce power consumption of the whole system.
摘要翻译：本发明的多天线收发器包括帧控制器和用于发送和接收的电路。发送组件包括序列选择电路，MIMO调制和编码电路以及许多TX RFE和AFE电路。接收组件包括MIMO解调和解码电路，序列分离电路和许多RX RFE和AFE电路。帧控制器可以单独启用和禁用TX和RX RFE和AFE电路，以降低整个系统的功耗。

8. 发明申请

US20120076173A1 Method and Device for Implementation of Adaptive Frequency Hopping by Power Spectral Density 有权
标题翻译：通过功率谱密度实现自适应跳频的方法和装置
公开(公告)号：US20120076173A1
公开(公告)日：2012-03-29
申请号：US13095844
申请日：2011-04-27
申请人： Chung-Yao Chang , Der-Zheng Liu , Ming-Yuh Yeh , Kuang-Yu Yen
发明人： Chung-Yao Chang , Der-Zheng Liu , Ming-Yuh Yeh , Kuang-Yu Yen
IPC分类号： H04B1/713
CPC分类号： H04B1/7143 , H04B2201/71346
摘要： A wireless communication device is disclosed. The wireless communication device includes a frequency hopping communication circuit, a power spectral density circuit and a control circuit. The frequency hopping communication circuit includes a channel map. The frequency hopping communication circuit selects one of channel in a channel map to connect to another frequency hopping communication circuit according to the channel map. The power spectral density circuit for generating a power spectral density signal by measuring spectrums on all channels connected to the frequency hopping communication circuit. The control circuit receives the power spectral density and output statistical distribution data to the frequency hopping communication circuit. The frequency hopping communication circuit updates the channel map according to the statistical distribution data.
摘要翻译：公开了一种无线通信设备。无线通信装置包括跳频通信电路，功率谱密度电路和控制电路。跳频通信电路包括频道图。跳频通信电路根据频道图选择频道图中的频道之一连接到另一跳频通信电路。功率谱密度电路，用于通过连接到跳频通信电路的所有信道上的频谱测量来产生功率谱密度信号。控制电路接收功率谱密度并输出到跳频通信电路的统计分布数据。跳频通信电路根据统计分布数据更新频道图。

9. 发明申请

US20060203945A1 METHOD AND APPARATUS FOR ANTENNA DIVERSITY 有权
标题翻译：天线多样性的方法和装置
公开(公告)号：US20060203945A1
公开(公告)日：2006-09-14
申请号：US11164486
申请日：2005-11-24
申请人： Kuang-Yu Yen , Der-Zheng Liu , Shu-Hua Yang , Chih-Hung Tsai
发明人： Kuang-Yu Yen , Der-Zheng Liu , Shu-Hua Yang , Chih-Hung Tsai
IPC分类号： H04L1/02
CPC分类号： H04B7/0814 , H04L1/1607
摘要： A receiver includes a plurality of antennas; a switching device coupled to the antennas for selecting one of the antennas to receive transmitted signals; a demodulator coupled to the switching device for demodulating the transmitted signals to generate demodulated signals; and a control circuit coupled to the demodulator and the switching device, for counting a specific type of packets within the demodulated signals so as to accordingly control the switching device.
摘要翻译：接收机包括多个天线; 耦合到所述天线的开关装置，用于选择所述天线之一以接收发射信号; 耦合到所述开关装置的解调器，用于解调所发送的信号以产生解调信号; 以及耦合到解调器和开关装置的控制电路，用于对解调信号内的特定类型的分组进行计数，从而相应地控制开关装置。

10. 发明授权

US08463214B2 Antenna diversity system 有权
标题翻译：天线分集系统
公开(公告)号：US08463214B2
公开(公告)日：2013-06-11
申请号：US13275321
申请日：2011-10-18
申请人： Kuang-Yu Yen , Der-Zheng Liu
发明人： Kuang-Yu Yen , Der-Zheng Liu
IPC分类号： H04B7/08 , H04K3/00
CPC分类号： H04B7/0874
摘要： An antenna diversity system having a non-interrupt function is provided. The antenna diversity system includes: a plurality of antennas, a plurality of radio frequency (RF) circuits, and a signal processing unit. The RF circuits are respectively coupled to the antennas, wherein each RF circuit is utilized for operating in one of a plurality of channels. The signal processing unit is coupled to the RF circuits, and utilized for determining whether a signal quality value of at least one of the antennas lower than a threshold to generate a determining result, and determining whether to change the channel of at least one of the RF circuits according to the determining result, so as to make at least two of the RF circuits operating in a same channel of the channels.
摘要翻译：提供具有非中断功能的天线分集系统。天线分集系统包括：多个天线，多个射频（RF）电路和信号处理单元。 RF电路分别耦合到天线，其中每个RF电路用于在多个信道之一中操作。所述信号处理单元耦合到所述RF电路，并且用于确定所述天线中的至少一个的信号质量值是否低于阈值以产生确定结果，以及确定是否改变所述信号处理单元中的至少一个的信道 RF电路根据确定结果，以使至少两个RF电路在通道的相同通道中工作。

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