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. 发明申请

US20110026643A1 CARRIER DETECT SYSTEM, APPARATUS AND METHOD THEREOF 有权
标题翻译：载体检测系统，装置及其方法
公开(公告)号：US20110026643A1
公开(公告)日：2011-02-03
申请号：US12512185
申请日：2009-07-30
申请人： CHARLES R. RUELKE , YADUNANDANA N. RAO , DARRELL J. STOGNER , RICHARD S. YOUNG
发明人： CHARLES R. RUELKE , YADUNANDANA N. RAO , DARRELL J. STOGNER , RICHARD S. YOUNG
IPC分类号： H04L25/06 , H04L27/06
CPC分类号： H04L25/06 , H03G3/3068 , H04L27/0014 , H04L27/38 , H04L27/3809 , H04L27/3863
摘要： A method of detecting an on-channel signal and synchronizing signal detection with correcting for DC offset errors in a direct conversion receiver is presented. A received signal is digitized, and a state machine operates to detect the presence of an on-channel signal. If the signal is not detected, a mixed mode training sequence is initiated in which the DC offset errors in both an analog and digital received signal path are corrected. While training, processing of the digitized samples by a digital signal processor and a host controller is suspended (while they are put into battery save mode) and the gain provided to subsequently received signals is minimized. The DC offset correction circuitry is bypassed and put into battery save mode at predetermined periods when DC offset correction is not performed.
摘要翻译：提出了一种在直接转换接收机中检测通道信号和同步信号检测与校正直流偏移误差的方法。接收到的信号被数字化，并且状态机操作以检测是否存在通道信号。如果未检测到信号，则开始混合模式训练序列，其中校正模拟和数字接收信号路径中的DC偏移误差。在训练时，由数字信号处理器和主机控制器处理数字化采样被暂停（当它们进入电池保存模式时），并且提供给随后接收到的信号的增益被最小化。直流偏移校正电路被旁路，并且在不执行直流偏移校正的预定周期中进入省电模式。

2. 发明申请

US20120129480A1 APPARATUS FOR RECEIVING MULTIPLE INDEPENDENT RF SIGNALS SIMULTANEOUSLY AND METHOD THEREOF 有权
标题翻译：用于同时接收多个独立RF信号的装置及其方法
公开(公告)号：US20120129480A1
公开(公告)日：2012-05-24
申请号：US12951235
申请日：2010-11-22
申请人： CHARLES R. RUELKE , ARIEL L. GALAN , YADUNANDANA N. RAO
发明人： CHARLES R. RUELKE , ARIEL L. GALAN , YADUNANDANA N. RAO
IPC分类号： H04B1/10 , H04B1/16
CPC分类号： H04B1/0021 , H04B1/001
摘要： An apparatus and method for receiving and processing multiple independent, uncorrelated RF signals is presented. The apparatus includes a Hybrid-Direct Conversion Receiver incorporating front end branches, protocol-specific digital processing branches, an interference detector, a correlator, and an offset control for controlling oscillator sources. The front end branches each contain a preselector that filters received signals and a mixer that down converts the received signal to an IF offset from a reference frequency by a unique offset. The bandwidth of an IF processor is partitioned into sub-channels corresponding to the different offsets and is wider than the combination of the sub-channels. The interference detector and correlator determine whether a particular desired signal is degraded by interference signals and select a new sub-channel. This information is provided to the offset control, which adjusts a LO source coupled to the corresponding down mixer accordingly.
摘要翻译：提出了一种用于接收和处理多个独立的，不相关的RF信号的装置和方法。该装置包括混合直接转换接收器，其包含前端分支，协议专用数字处理分支，干扰检测器，相关器和用于控制振荡器源的偏移控制。前端支路每个都包含用于滤波接收信号的预选器和一个将接收信号从参考频率转换为独特偏移的IF偏移的混频器。 IF处理器的带宽被划分为与不同偏移量相对应的子信道，并且比子信道的组合更宽。干扰检测器和相关器确定特定期望信号是否被干扰信号降级并选择新的子信道。该信息被提供给偏移控制器，该偏移控制器相应地调节耦合到相应的下混频器的LO源。

3. 发明申请

US20100222007A1 NARROWBAND SYSTEM AND METHOD FOR DEFINING NARROWBAND CHANNELS IN UNUSED WIDEBAND CHANNELS 有权
标题翻译：窄带通道中的窄带信道的窄带系统和方法
公开(公告)号：US20100222007A1
公开(公告)日：2010-09-02
申请号：US12394955
申请日：2009-02-27
申请人： YADUNANDANA N. RAO , APOORV CHAUDHRI , GEETHA K. THAMPI
发明人： YADUNANDANA N. RAO , APOORV CHAUDHRI , GEETHA K. THAMPI
IPC分类号： H04B17/00 , H04N5/38
CPC分类号： H04W24/10 , H04W8/005 , H04W16/14 , H04W64/00 , H04W72/00 , H04W72/04
摘要： A narrowband communication system (100) includes a base station (102) and a plurality of subscriber units (104). The base station assigns one or more wideband channels to be measured to each subscriber unit (606). The subscriber units tune to their assigned wideband channels and perform narrowband measurements, then report the results to the base station (612). The base station then analyzes the measurement results (614) and selects available wideband channels to be divided into narrowband channels for use by the narrowband system.
摘要翻译：窄带通信系统（100）包括基站（102）和多个用户单元（104）。基站向每个用户单元（606）分配要测量的一个或多个宽带信道。用户单元调谐到其分配的宽带信道并执行窄带测量，然后将结果报告给基站（612）。然后，基站分析测量结果（614）并选择可分割成窄带信道的可用宽带信道以供窄带系统使用。

4. 发明申请

US20110105036A1 METHOD AND APPARATUS FOR SENSING PRESENCE OF AN INCUMBENT SIGNAL ON A SECONDARY RADIO CHANNEL 审中-公开
标题翻译：传感器在二次无线电通道上的传播信号的方法和装置
公开(公告)号：US20110105036A1
公开(公告)日：2011-05-05
申请号：US12612363
申请日：2009-11-04
申请人： YADUNANDANA N. RAO , APOORV CHAUDHRI , SPYROS KYPEROUNTAS
发明人： YADUNANDANA N. RAO , APOORV CHAUDHRI , SPYROS KYPEROUNTAS
IPC分类号： H04B17/00 , H04B15/00
CPC分类号： H04W16/14 , H04B17/382 , H04W72/082 , H04W88/06
摘要： A remote station communicates with a base station over a secondary radio channel. During communication, the remote station determines channel conditions of the secondary radio channel. Based on the channel conditions, the remote station selects one or more sensing methods to be performed on the secondary radio channel. The result of performing the sensing method is used to determining whether an incumbent signal is present on the secondary radio channel.
摘要翻译：远程站通过辅助无线电信道与基站进行通信。在通信期间，远程站确定辅助无线电信道的信道状况。基于信道条件，远程站选择要在辅助无线电信道上执行的一种或多种感测方法。执行感测方法的结果用于确定辅助无线电信道上是否存在现有信号。

5. 发明申请

US20120238309A1 METHOD AND APPARATUS FOR OPTIMIZING SPECTRUM UTILIZATION BY A COGNITIVE RADIO NETWORK 有权
标题翻译：通过认知无线电网络优化频谱利用的方法和装置
公开(公告)号：US20120238309A1
公开(公告)日：2012-09-20
申请号：US13368104
申请日：2012-02-07
申请人： APOORV CHAUDHRI , DAVID P. GURNEY , STEPHEN L. KUFFNER , YADUNANDANA N. RAO , MATTHEW E. SIMMS
发明人： APOORV CHAUDHRI , DAVID P. GURNEY , STEPHEN L. KUFFNER , YADUNANDANA N. RAO , MATTHEW E. SIMMS
IPC分类号： H04W48/20 , H04W52/28
CPC分类号： H04W72/082 , H04W4/02 , H04W8/205 , H04W16/14 , H04W48/20 , H04W72/02
摘要： A technique for a secondary communication system to utilize spectrum designated to another (or primary) communication system is provided. By ranking a plurality of secondary base stations based on base station transmit power, calculated required transmit power and path loss, a set of criteria is developed for selecting a highest ranked secondary base station for operation within a primary's spectrum. The ranking may be adapted based on mobility of the secondary's subscriber; and as such the secondary system communicates within the primary's spectrum using the adaptively ranked base stations. Channel selection may also be ranked. The technique and apparatus allows a cognitive radio (CR) network to operate within an incumbent network's spectrum.
摘要翻译：提供了一种次要通信系统利用指定给另一（通信）通信系统的频谱的技术。通过基于基站发射功率，计算的所需发射功率和路径损耗对多个次基站进行排序，开发了用于选择最高等级次级基站以在主频谱内操作的一组标准。可以基于辅助用户的移动性来调整排名; 并且因此次级系统使用自适应排名的基站在主频谱内进行通信。频道选择也可能被排名。该技术和装置允许认知无线电（CR）网络在现有网络的频谱范围内运行。

6. 发明申请

US20120064853A1 SYSTEM AND METHOD FOR MANAGING POWER CONSUMPTION IN A DEVICE 有权
标题翻译：用于管理设备中的功率消耗的系统和方法
公开(公告)号：US20120064853A1
公开(公告)日：2012-03-15
申请号：US12879053
申请日：2010-09-10
申请人： YADUNANDANA N. RAO , SCOTT M. ALAZRAKI , APOORV CHAUDHRI
发明人： YADUNANDANA N. RAO , SCOTT M. ALAZRAKI , APOORV CHAUDHRI
IPC分类号： H04B1/16
CPC分类号： H04W52/0216 , Y02D70/142 , Y02D70/164
摘要： Systems and methods for managing power consumption in a device include toggling an ON-OFF setting of apparatus, which controls a carrier detector. The toggling is carried out according to a first duty cycle having a fixed OFF-time duration and a first dwell time having a first dwell time duration during which the carrier detector performs radio frequency carrier detection function. The device receives at least one input that affects the radio frequency carrier detection function, and the first duty cycle is changed to a second duty cycle. The toggling is carried out according to the second duty cycle, which has the same fixed OFF-time duration of the first duty cycle and a second dwell time having a second dwell time duration that is longer than the first dwell time duration, during which the radio frequency carrier detection function is performed.
摘要翻译：用于管理设备中的功率消耗的系统和方法包括切换控制载波检测器的设备的ON-OFF设置。根据具有固定的关闭时间的第一占空比和具有载波检测器执行射频载波检测功能的第一驻留时间的第一驻留时间执行切换。该装置接收影响射频载波检测功能的至少一个输入，并且将第一占空比改变为第二占空比。根据第二占空比进行切换，第二占空比具有与第一占空比相同的固定的关闭时间持续时间和具有比第一停留时间长的第二停留时间的第二停留时间，在此期间，执行射频载波检测功能。

7. 发明申请

US20100105345A1 METHOD AND DEVICE FOR DETECTING PRESENCE OF A CARRIER SIGNAL IN A RECEIVED SIGNAL 有权
标题翻译：用于检测载波信号在接收信号中的存在的方法和装置
公开(公告)号：US20100105345A1
公开(公告)日：2010-04-29
申请号：US12257672
申请日：2008-10-24
申请人： GEETHA K. THAMPI , APOORV CHAUDHRI , JESUS F. CORRETJER , YADUNANDANA N. RAO
发明人： GEETHA K. THAMPI , APOORV CHAUDHRI , JESUS F. CORRETJER , YADUNANDANA N. RAO
IPC分类号： H04B1/06
CPC分类号： H04L27/0014 , H04L27/3845
摘要： A device receives a signal and, prior to demodulating the signal determines whether carrier is present in the received signal based on the correlation depth of the received signal. The device determines a plurality of values for the received signal that indicate the amount of correlation in the received signal and detects the presence of the carrier in the received signal as a function of the plurality of values. The plurality of values can include autocorrelation values and prediction coefficients, wherein the autocorrelation values are estimated based on an autocorrelation function derived for the received signal, and the prediction coefficients are generated using a prediction model that is derived as a function of the autocorrelation values. The prediction coefficients can be summed to generate a decision statistic that is compared to a detection threshold to detect the presence of the carrier.
摘要翻译：设备接收信号，并且在解调之前，信号基于接收信号的相关深度确定载波是否存在于接收信号中。设备确定接收信号的多个值，其指示接收信号中的相关量，并根据多个值检测接收信号中载波的存在。多个值可以包括自相关值和预测系数，其中基于针对接收信号导出的自相关函数来估计自相关值，并且使用作为自相关值的函数导出的预测模型来生成预测系数。可以将预测系数相加以生成与检测阈值进行比较以检测载体的存在的判定统计量。

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