专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

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

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。

5. 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。

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

US07190929B2 Method and apparatus of RAKE finger management in RAKE receiver 失效
标题翻译： RAKE接收机中RAKE手指管理的方法和装置
公开(公告)号：US07190929B2
公开(公告)日：2007-03-13
申请号：US10388675
申请日：2003-03-13
申请人： Tai-Cheng Liu
发明人： Tai-Cheng Liu
IPC分类号： H04B1/00 , H04B15/00 , H04B1/10 , H04B1/18
CPC分类号： H04B1/7117
摘要： The present invention is an assigning system and method for assigning a plurality of rake finger tracking units of a rake receiver in a Code Division Multiple Access (CDMA) communication system. The plurality of rake finger tracking units is used for tracking a plurality of path signal of each multipath signal by a plurality of corresponding predetermined tracking time positions. The assigning system and method estimate a plurality of corresponding tracking ranges of the plurality of path signals and compare the plurality of predetermined tracking time positions with the plurality of tracking ranges. If there is more than one predetermined tracking time positions in one tracking range, the assigning system assigns a rake finger tracking unit corresponding to one of the tracking time positions to track the path signal corresponding to the tracking range. If there is no predetermined tracking time position in the tracking range, the assigning system assigns an idle rake finger tracking unit to track the path signal corresponding to the tracking range. By the way, the present invention uses the rake finger tracking units of the rake receiver with the best efficiency to avoid the idle resources of the communication system.
摘要翻译：本发明是一种用于在码分多址（CDMA）通信系统中分配耙式接收机的多个耙指跟踪单元的分配系统和方法。多个耙指跟踪单元用于通过多个对应的预定跟踪时间位置跟踪每个多径信号的多个路径信号。所述分配系统和方法估计所述多个路径信号的多个对应的跟踪范围，并将所述多个预定跟踪时间位置与所述多个跟踪范围进行比较。如果在一个跟踪范围内存在多于一个预定的跟踪时间位置，则分配系统分配与跟踪时间位置之一相对应的耙指跟踪单元，以跟踪对应于跟踪范围的路径信号。如果在跟踪范围内没有预定的跟踪时间位置，则分配系统分配空闲耙指跟踪单元来跟踪对应于跟踪范围的路径信号。顺便提及，本发明以最好的效率利用耙机接收机的耙指跟踪单元来避免通信系统的空闲资源。

8. 发明授权

US08630230B2 Method of reducing interference between two communication systems operating in adjacent frequency bands 有权
标题翻译：减少在相邻频带中工作的两个通信系统之间的干扰的方法
公开(公告)号：US08630230B2
公开(公告)日：2014-01-14
申请号：US12962623
申请日：2010-12-07
申请人： Tai-Cheng Liu , Chi-Chen Lee , Ming-Chun Cheng , Chun-Jen Tsai , Chia-Ming Chang , Ching-Hwa Yu
发明人： Tai-Cheng Liu , Chi-Chen Lee , Ming-Chun Cheng , Chun-Jen Tsai , Chia-Ming Chang , Ching-Hwa Yu
IPC分类号： H04W4/00
CPC分类号： H04L1/0001 , H04L1/1829
摘要： A method of reducing interference between two communication systems operating in adjacent frequency bands and coexisting in a communication device is provided, and the two communication systems are a first communication system and a second communication system. The method includes deciding whether to perform an arbitration procedure on a downlink subframe of the first communication system according to a CINR of the first communication system and a RSSI of the second communication system; deciding whether to perform the arbitration procedure on an uplink subframe of the first communication system according to a transmit power of the first communication system and a RSSI value of the second communication system; and when deciding to perform the arbitration procedure on the downlink or uplink subframe, further deciding whether to send a specific packet to request one or more stations not to send packets to the second communication system.
摘要翻译：提供了减少在相邻频带中工作并在通信设备中共存的两个通信系统之间的干扰的方法，并且两个通信系统是第一通信系统和第二通信系统。该方法包括根据第一通信系统的CINR和第二通信系统的RSSI来决定是否对第一通信系统的下行链路子帧执行仲裁过程; 根据所述第一通信系统的发送功率和所述第二通信系统的RSSI值来决定是否对所述第一通信系统的上行链路子帧执行所述仲裁过程; 并且当决定在下行链路或上行链路子帧上执行仲裁过程时，进一步决定是否发送特定分组以请求一个或多个站不向第二通信系统发送分组。

9. 发明申请

US20090060006A1 RECEIVER DETECTING SIGNALS BASED ON SPECTRUM CHARACTERISTIC AND DETECTING METHOD THEREOF 有权
标题翻译：基于光谱特征及其检测方法的接收机检测信号
公开(公告)号：US20090060006A1
公开(公告)日：2009-03-05
申请号：US11846521
申请日：2007-08-28
申请人： Tai-Cheng Liu , Hsuan-Yu Liu , Po-Yuen Cheng
发明人： Tai-Cheng Liu , Hsuan-Yu Liu , Po-Yuen Cheng
IPC分类号： H04B1/707
CPC分类号： H04L25/022 , H04L25/03828 , H04L27/2647
摘要： A receiver for receiving a target signal complying with a specific communication specification comprising a specific spectrum characteristic includes a detecting module for detecting a packet of an input signal, a transforming unit for transforming the packet from a time domain to a frequency domain to derive a spectrum characteristic of the input signal, and a determining unit for determining whether the input signal is the target signal according to the spectrum characteristic of the input signal. Therefore, the proposed receiver is able to reduce packet miss rate and false alarm rate while robust to a severe channel condition, and achieve fast and accurate signal quality detection.
摘要翻译：用于接收符合包括特定频谱特性的特定通信规范的目标信号的接收机包括用于检测输入信号分组的检测模块，用于将分组从时域变换到频域的变换单元，以导出频谱输入信号的特性;以及确定单元，用于根据输入信号的频谱特性确定输入信号是否为目标信号。因此，所提出的接收机能够在恶劣的信道条件下稳定地降低分组丢失率和误报率，并且实现快速准确的信号质量检测。

10. 发明授权

US07860177B2 Receiver detecting signals based on spectrum characteristic and detecting method thereof 有权
标题翻译：基于频谱特性的接收机检测信号及其检测方法
公开(公告)号：US07860177B2
公开(公告)日：2010-12-28
申请号：US11846521
申请日：2007-08-28
申请人： Tai-Cheng Liu , Hsuan-Yu Liu , Po-Yuen Cheng
发明人： Tai-Cheng Liu , Hsuan-Yu Liu , Po-Yuen Cheng
IPC分类号： H04K1/10 , H04J11/00
CPC分类号： H04L25/022 , H04L25/03828 , H04L27/2647
摘要： A receiver for receiving a target signal complying with a specific communication specification comprising a specific spectrum characteristic includes a detecting module for detecting a packet of an input signal, a transforming unit for transforming the packet from a time domain to a frequency domain to derive a spectrum characteristic of the input signal, and a determining unit for determining whether the input signal is the target signal according to the spectrum characteristic of the input signal. Therefore, the proposed receiver is able to reduce packet miss rate and false alarm rate while robust to a severe channel condition, and achieve fast and accurate signal quality detection.
摘要翻译：用于接收符合包括特定频谱特性的特定通信规范的目标信号的接收机包括用于检测输入信号分组的检测模块，用于将分组从时域变换到频域的变换单元，以导出频谱输入信号的特性;以及确定单元，用于根据输入信号的频谱特性确定输入信号是否为目标信号。因此，所提出的接收机能够在恶劣的信道条件下稳定地降低分组丢失率和误报率，并且实现快速准确的信号质量检测。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式