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1. 发明申请

US20090170458A1 Method and Receiver for Identifying a Leading Edge Time Period in a Received Radio Signal 审中-公开
标题翻译：用于识别接收无线电信号中的前沿时间周期的方法和接收机
公开(公告)号：US20090170458A1
公开(公告)日：2009-07-02
申请号：US11995394
申请日：2005-07-19
申请人： Andreas F. Molisch , Ismail Guvenc , Zafer Sahinoglu
发明人： Andreas F. Molisch , Ismail Guvenc , Zafer Sahinoglu
IPC分类号： H04B17/00
CPC分类号： H04B1/71637 , H04B1/7183
摘要： A method for identifying a leading edge time period of a received radio signal includes identifying a greatest energy time period in a sequence of time periods. The received radio signal has a greatest average energy in the greatest energy time period. The method also includes identifying a least energy time period in the sequence of time periods. The received radio signal has a least average energy in the least energy time period. Further, the method includes setting a threshold energy based on the greatest average energy and the least average energy, determining a number of window time periods based on a characteristic of a radio channel used by the received radio signal, and identifying as a leading edge time period an earliest time period that precedes the greatest energy time period within the number of window time periods. The received radio signal in the leading edge time period has an average energy greater than or equal to the threshold energy.
摘要翻译：一种用于识别所接收的无线电信号的前沿时间段的方法包括识别时间序列中的最大能量时间段。接收的无线电信号在最大能量时间段内具有最大的平均能量。该方法还包括识别时间序列中的最少能量时间段。所接收的无线电信号在最短能量时间段内具有最小平均能量。此外，该方法包括基于最大平均能量和最小平均能量来设置阈值能量，基于由所接收的无线电信号使用的无线电信道的特性确定窗口时间段的数量，以及将其识别为前沿时间期间是在窗口时间段内的最大能量时间段之前的最早时间段。在前沿时间段中接收的无线电信号具有大于或等于阈值能量的平均能量。

2. 发明申请

US20090075590A1 Method and System for Estimating Time of Arrival of Signals Using Multiple Different Time Scales 审中-公开
标题翻译：使用多个不同时间尺度估计信号到达时间的方法和系统
公开(公告)号：US20090075590A1
公开(公告)日：2009-03-19
申请号：US11577106
申请日：2005-04-15
申请人： Zafer Sahinoglu , Ismail Guvenc , Andreas F. Molisch
发明人： Zafer Sahinoglu , Ismail Guvenc , Andreas F. Molisch
IPC分类号： H04B7/24
CPC分类号： H04B1/71637 , G01S5/0221 , G01S13/76 , H04B17/318 , H04B17/336 , H04B17/345
摘要： A method and system (500) estimates a time of arrival of a signal received via a wireless communications channel. The energy in the received signal is conditioned at multiple different time scales to produce a conditioned signal (700). Then, a leading edge is detected in the conditioned signal (550). The leading edge corresponds to the time of arrival of the received signal (551).
摘要翻译：方法和系统（500）估计经由无线通信信道接收的信号的到达时间。接收信号中的能量被调节在多个不同的时标上以产生调节信号（700）。然后，在调节信号（550）中检测前沿。前沿对应于接收信号的到达时间（551）。

3. 发明授权

US07526048B2 Energy threshold selection for UWB TOA estimation 失效
标题翻译： UWB TOA估计的能量阈值选择
公开(公告)号：US07526048B2
公开(公告)日：2009-04-28
申请号：US11202006
申请日：2005-08-11
申请人： Zafer Sahinoglu , Ismail Guvenc
发明人： Zafer Sahinoglu , Ismail Guvenc
IPC分类号： H04L27/00
CPC分类号： G01S5/0221 , G01S7/285
摘要： A method for estimation a time-of-arrival of a radio signal is provided. The signal is an ultra-wideband (UWB) signal. The method uses kurtosis of the received signal to estimate an energy threshold of the signal. The energy threshold can be used to determine a time-of-arrival of the signal.
摘要翻译：提供了一种用于估计无线电信号的到达时间的方法。该信号是超宽带（UWB）信号。该方法使用接收信号的峰度来估计信号的能量阈值。能量阈值可用于确定信号的到达时间。

4. 发明申请

US20070036241A1 Energy threshold selection for UWB TOA estimation 失效
标题翻译： UWB TOA估计的能量阈值选择
公开(公告)号：US20070036241A1
公开(公告)日：2007-02-15
申请号：US11202006
申请日：2005-08-11
申请人： Zafer Sahinoglu , Ismail Guvenc
发明人： Zafer Sahinoglu , Ismail Guvenc
IPC分类号： H04L25/06
CPC分类号： G01S5/0221 , G01S7/285
摘要： A method for estimation a time-of-arrival of a radio signal is provided. The signal is an ultra-wideband (UWB) signal. The method uses kurtosis of the received signal to estimate an energy threshold of the signal. The energy threshold can be used to determine a time-of-arrival of the signal.
摘要翻译：提供了一种用于估计无线电信号的到达时间的方法。该信号是超宽带（UWB）信号。该方法使用接收信号的峰度来估计信号的能量阈值。能量阈值可用于确定信号的到达时间。

5. 发明授权

US08442541B2 System and method for inter-cell interference avoidance in co-channel networks 有权
标题翻译：同频道网络中小区间干扰避免的系统和方法
公开(公告)号：US08442541B2
公开(公告)日：2013-05-14
申请号：US13073137
申请日：2011-03-28
申请人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe
发明人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe
IPC分类号： H04W24/08
CPC分类号： H04W72/1231 , H04L5/0032 , H04L5/0058
摘要： Systems and methods are provided for a distributed inter-cell interference avoidance (ICIA) technique for avoiding co-channel interference between femtocell networks and macrocell networks. At the macrocell, user equipments sense the downlink (DL) spectrum and detects whether there are any nearby interfering femtocells. If there is any interference, a macrocell base station appropriately re-schedules the DL resources and also uses a mapping function to re-schedule uplink (UL) resources based on the re-scheduled DL resources. At the femtocell, a femtocell base station senses the UL spectrum to detect for interference from nearby macrocell users. If there is interference, femtocell gives priority for use of the resources to the macrocell by releasing UL resources. Femtocell may also use the same mapping function to obtain the DL resources used by the macrocell and to re-schedule DL and UL resources of the femtocell to avoid using the DL and UL resources of the macrocell.
摘要翻译：提供了用于分散小区间干扰避免（ICIA）技术的系统和方法，用于避免毫微微小区网络与宏小区网络之间的同信道干扰。在宏小区，用户设备检测下行链路（DL）频谱，并检测是否有任何附近的干扰毫微微小区。如果存在干扰，则宏小区基站适当地重新调度DL资源，并且还使用映射函数来基于重新调度的DL资源重新调度上行链路（UL）资源。毫微微小区，毫微微小区基站感测到UL频谱以检测来自附近的宏小区用户的干扰。如果存在干扰，则通过释放UL资源，毫微微小区优先地向宏小区使用资源。毫微微小区也可以使用相同的映射函数来获得由宏小区使用的DL资源，并重新调度毫微微小区的DL和UL资源，以避免使用宏小区的DL和UL资源。

6. 发明申请

US20120003985A1 CO-CHANNEL INTERFERENCE REDUCTION IN FEMTOCELL NETWORKS 审中-公开
标题翻译： FEMTOCELL网络中的CO信道干扰减少
公开(公告)号：US20120003985A1
公开(公告)日：2012-01-05
申请号：US13171905
申请日：2011-06-29
申请人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe
发明人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe
IPC分类号： H04W72/04
CPC分类号： H04W56/0015 , H04W84/045 , Y02D70/1262
摘要： Co-channel macrocell users will inherently produce co-channel interference at a nearby femtocell base station. To reduce the peak co-channel interference power, the femtocell users adjust their symbol timing with regard to the macrocell users so as to maximize a spreading of the co-channel interference spectrum. In this fashion, the peak co-channel interference power is reduced, thereby leading to improved bit error rates for the femtocell users.
摘要翻译：共同信道宏小区用户将固有地在附近的毫微微小区基站上产生同信道干扰。为了减小峰值的同信道干扰功率，毫微微小区用户相对于宏小区用户调整其符号定时，以便使同信道干扰频谱的扩展最大化。以这种方式，峰值同信道干扰功率降低，从而导致针对毫微微小区用户的改进的比特错误率。

7. 发明申请

US20110312317A1 INTER-CARRIER INTERFERENCE MANAGEMENT IN DEDICATED CHANNEL FEMTOCELL NETWORKS 有权
标题翻译：专用通道FEMTOCELL网络中的互操作干扰管理
公开(公告)号：US20110312317A1
公开(公告)日：2011-12-22
申请号：US13165059
申请日：2011-06-21
申请人： Alphan Sahin , Ismail Guvenc , Huseyin Arslan
发明人： Alphan Sahin , Ismail Guvenc , Huseyin Arslan
IPC分类号： H04W4/00
CPC分类号： H04W16/16 , H04W84/045
摘要： In one embodiment, a method of mitigating uplink inter-carrier interference (ICI) from macrocell mobile stations at a dedicated channel femtocell base station is provided that includes: determining a timing offset for a femtocell uplink symbol timing that reduces the ICI based upon an expected spatial distribution for the macrocell mobile stations with respect to the femtocell base station; communicating the timing offset to at least one femtocell mobile station; and at the femtocell base station, receiving an uplink symbol transmission from the at least one femtocell mobile station according to the timing offset.
摘要翻译：在一个实施例中，提供了一种在专用信道毫微微小区基站处减轻来自宏小区移动站的上行链路载波间干扰（ICI）的方法，其包括：基于预期的方式来确定用于减少ICI的毫微微小区上行链路符号定时的定时偏移相对于毫微微小区基站的宏小区移动站的空间分布; 将定时偏移传送到至少一个毫微微蜂窝移动站; 并且在所述毫微微小区基站处，根据所述定时偏移从所述至少一个毫微微小区移动站接收上行链路符号传输。

8. 发明申请

US20090291690A1 Femtocell Channel Assignment and Power Control for Improved Femtocell Coverage and Efficient Cell Search 有权
标题翻译：蜂窝小区信道分配和功率控制，用于改进的毫微微小区覆盖和有效的小区搜索
公开(公告)号：US20090291690A1
公开(公告)日：2009-11-26
申请号：US12463307
申请日：2009-05-08
申请人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
发明人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W72/00 , H04W36/00 , H04B7/00 , H04B15/00
CPC分类号： H04W16/10 , H04W16/30 , H04W52/243 , H04W52/244 , H04W52/343 , H04W52/40 , H04W72/02 , H04W72/0453 , H04W72/082 , H04W84/045
摘要： A method and a communication system including femtocells within a macrocell efficiently manage interference between the different femtocells, and between each femtocell and a macrocell. An efficient frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique carried out by the femtocells. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station (BS). The frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics of the co-channel implementation. In one embodiment, a joint power control and frequency band assignment technique is used, which partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region. Depending on a femtocell's location, it is assigned a certain power level and a frequency band. Power control may be used within the power-control region while, in the other regions, a fixed transmission power may be used.
摘要翻译：包括宏小区内的毫微微小区的方法和通信系统有效地管理不同毫微微小区之间以及每个毫微微小区与宏小区之间的干扰。毫微微小区的有效的频率分配方案使用由毫微微小区执行的频谱感测技术来最小化毫微微小区和宏小区之间以及不同毫微微小区之间的干扰。频率分配方案从一组候选信道中选择一个合适的信道，并确保毫微微小区即使在接近宏小区基站（BS）时也具有可接受的覆盖区域。频率分配方案有利于共同信道实现来利用同频道实现的切换和小区搜索特性。在一个实施例中，使用联合功率控制和频带分配技术，其将宏小区的覆盖区域划分为内部区域，功率控制区域和外部区域。根据毫微微小区的位置，它被分配一定的功率电平和频带。功率控制可以在功率控制区域内使用，而在其它区域中可以使用固定的发射功率。

9. 发明申请

US20080032710A1 WEIGHTED LEAST SQUARE LOCALIZATION METHOD EXPLOITING MULTIPATH CHANNEL STATISTICSFOR NON-LINE-OF-SIGHT MITIGATION 失效
标题翻译：加权最小二乘法定位方法揭示多通道通道统计信号非线性缓解
公开(公告)号：US20080032710A1
公开(公告)日：2008-02-07
申请号：US11832558
申请日：2007-08-01
申请人： Ismail Guvenc , Chia-Chin Chong
发明人： Ismail Guvenc , Chia-Chin Chong
IPC分类号： H04Q7/22
CPC分类号： G01S5/0215 , G01S5/0273 , G01S5/14
摘要： A method mitigates NLOS conditions based on weighted least squares (WLS) technique, in which the weights are derived from multipath components (MPCs) of the received signals. The weighting methodology can be used with both linear and non-linear least squares models, as well as different other NLOS mitigation schemes, such as residual based algorithms or maximum likelihood techniques.
摘要翻译：一种基于加权最小二乘法（WLS）技术来减轻NLOS条件的方法，其中权重是从接收信号的多径分量（MPC）导出的。加权方法可以与线性和非线性最小二乘模型以及不同的其他NLOS缓解方案一起使用，例如基于残差的算法或最大似然技术。

10. 发明授权

US08280387B2 Femtocell channel assignment and power control for improved femtocell coverage and efficient cell search 有权
标题翻译：毫微微小区信道分配和功率控制，用于改进的毫微微小区覆盖和有效的小区搜索
公开(公告)号：US08280387B2
公开(公告)日：2012-10-02
申请号：US12463307
申请日：2009-05-08
申请人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
发明人： Ismail Guvenc , Moo Ryong Jeong , Fujio Watanabe , Hiroshi Inamura
IPC分类号： H04W40/00 , H04B7/00 , H04B15/00
CPC分类号： H04W16/10 , H04W16/30 , H04W52/243 , H04W52/244 , H04W52/343 , H04W52/40 , H04W72/02 , H04W72/0453 , H04W72/082 , H04W84/045
摘要： A method and a communication system including femtocells within a macrocell efficiently manage interference between the different femtocells, and between each femtocell and a macrocell. An efficient frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique carried out by the femtocells. The frequency assignment scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station (BS). The frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics of the co-channel implementation. In one embodiment, a joint power control and frequency band assignment technique is used, which partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region. Depending on a femtocell's location, it is assigned a certain power level and a frequency band. Power control may be used within the power-control region while, in the other regions, a fixed transmission power may be used.
摘要翻译：包括宏小区内的毫微微小区的方法和通信系统有效地管理不同毫微微小区之间以及每个毫微微小区与宏小区之间的干扰。毫微微小区的有效的频率分配方案使用由毫微微小区执行的频谱感测技术来最小化毫微微小区和宏小区之间以及不同毫微微小区之间的干扰。频率分配方案从一组候选信道中选择一个合适的信道，并确保毫微微小区即使在接近宏小区基站（BS）时也具有可接受的覆盖区域。频率分配方案有利于共同信道实现来利用同频道实现的切换和小区搜索特性。在一个实施例中，使用联合功率控制和频带分配技术，其将宏小区的覆盖区域划分为内部区域，功率控制区域和外部区域。根据毫微微小区的位置，它被分配一定的功率电平和频带。功率控制可以在功率控制区域内使用，而在其它区域中可以使用固定的发射功率。

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