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51. 发明公开

EP1488512A1 GAIN CONTROL FOR COMMUNICATIONS DEVICE 失效
标题翻译：增益控制的通信设备
公开(公告)号：EP1488512A1
公开(公告)日：2004-12-22
申请号：EP03721474.9
申请日：2003-03-26
申请人： QUALCOMM Incorporated
发明人： BLACK, Peter J. , SINDHUSHAYANA, Nagabhushana , CHALLA, Raghu , SELTMANN, Kevin
IPC分类号： H03G3/20 , H04B1/38
CPC分类号： H03G3/3036 , H03G3/3068
摘要： Systems and techniques for gain control include amplifying a signal with an amplifier having a gain represented by one of a plurality of gain curves depending on a value of a parameter, the signal being amplified at a first one of the parameter values, and controlling the gain of the amplified signal from a predetermined gain curve relating to the gain curve of the amplifier for a second one of the parameter values by adjusting a gain control signal corresponding to a point on the predetermined gain curve as a function of the first one of the parameter values, and applying the adjusted gain control signal to the amplifier. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

52. 发明公开

EP3766289A1 SKIPPING PERIODIC MEASUREMENTS TO ENABLE POWER SAVING IN USER EQUIPMENTS 审中-公开
公开(公告)号：EP3766289A1
公开(公告)日：2021-01-20
申请号：EP19714291.2
申请日：2019-03-15
申请人： QUALCOMM Incorporated
发明人： JAIN, Chhavi , EFE, Baris , LI, Yong , CHALLA, Raghu , HSU, Chun-Hao
IPC分类号： H04W52/02 , H04W56/00 , H04L1/00 , H04W24/10

53. 发明公开

EP3552441A1 REPORTING POWER LIMIT AND CORRESPONDING CONSTRAINT 有权
公开(公告)号：EP3552441A1
公开(公告)日：2019-10-16
申请号：EP17832623.7
申请日：2017-12-12
申请人： QUALCOMM Incorporated
发明人： SAMPATH, Ashwin , PARTYKA, Andrzej , BURKE, Joseph , KOYMEN, Ozge , CHALLA, Raghu
IPC分类号： H04W52/36

54. 发明公开

EP3504909A1 TECHNIQUES FOR REDUCING POWER CONSUMPTION BASED AT LEAST IN PART ON RECONFIGURATION OF A USER EQUIPMENT IN A SUB-TRANSMISSION TIME INTERVAL (TTI) RANGE 审中-公开
公开(公告)号：EP3504909A1
公开(公告)日：2019-07-03
申请号：EP17761989.7
申请日：2017-08-23
申请人： QUALCOMM Incorporated
发明人： SRIPATHI, Prashant Udupa , VAZE, Chinmay , YAN, Hongbo , CHALLA, Raghu
IPC分类号： H04W52/02 , H04L1/06 , H04L1/00

55. 发明公开

EP1880234A2 SYSTEMS, METHODS, AND APPARATUS FOR FREQUENCY CONTROL 审中-公开
标题翻译：系统，方法和设备频率控制
公开(公告)号：EP1880234A2
公开(公告)日：2008-01-23
申请号：EP06770254.8
申请日：2006-05-10
申请人： QUALCOMM INCORPORATED
发明人： SIMIC, Emilija, M. , PATRICK, Christopher , CHALLA, Raghu , ROWITCH, Douglas, N.
IPC分类号： G01S13/74
CPC分类号： G01S19/235 , H04B1/26
摘要： A receiver according to one embodiment includes a frequency control unit configured to receive a stream of samples including a plurality of received instances of a transmitted signal. The frequency control unit is configured to output a first correction signal (e.g. indicating a rotation) that is based on more than one of the received instances and a second correction signal (e.g. to control an oscillator) that is also based on more than one of the received instances. In some embodiments, a controlled oscillator is used to receive and/or transmit another signal, such as a signal received from a GPS space vehicle. In other embodiments, the received instances are from a GPS signal. In further embodiments, a fixed-frequency oscillator is used, and the second correction signal is used to receive and/or transmit another signal, such as a GPS signal.

56. 发明公开

EP1407588A1 METHOD AND APPARATUS FOR ACQUIRING AND TRACKING PILOTS IN A CDMA COMMUNICATION SYSTEM 有权
标题翻译：方法和设备，在一个CDMA通信系统获取和导频信号的重新定位
公开(公告)号：EP1407588A1
公开(公告)日：2004-04-14
申请号：EP02752423.0
申请日：2002-07-16
申请人： Qualcomm Incorporated
发明人： CHALLA, Raghu , SIH, Gilbert, Christopher
IPC分类号： H04L27/00 , H04B1/707
CPC分类号： H04L27/0014 , H04L2027/0055 , H04L2027/0079 , H04L2027/0087
摘要： Techniques to acquire and track pilots in a CDMA system. In an aspect, frequency acquisition of a number of signal instances (i.e., multipaths) in a received signal may be achieved concurrently based on a frequency control loop (RAFC) maintained for each finger processor of a rake receiver. Upon successful acquisition, frequency tracking of acquired multipaths may be achieved based on a combination of a frequency control loop (VAFC) maintained for an oscillator used for downconverting the received signal and the RAFCs for the finger processors. In a tracking mode, the VAFC tracks the average frequency of the acquired multipaths by adjusting the frequency of the oscillator. The RAFC of each finger processor tracks the residual frequency error (e.g., due to Doppler frequency shift) of the individual acquired multipath by adjusting the frequency of a complex sinusoidal signal used in a rotator within the finger processor.

57. 发明公开

EP1350372A2 CALIBRATING THE LOCAL OSCILLATION FREQUENCY OF A CDMA RECEIVER 审中-公开
标题翻译： KALIBRIERUNG DER LOKALEN OSZILLATIONSFREQUENZ EINES CDMA-EMPFÄNGERS
公开(公告)号：EP1350372A2
公开(公告)日：2003-10-08
申请号：EP02714678.6
申请日：2002-01-04
申请人： QUALCOMM INCORPORATED
发明人： SIH, Gilbert, C. , CHALLA, Raghu
IPC分类号： H04L27/00 , H04L27/233
CPC分类号： H04L27/0014 , H04L2027/0016 , H04L2027/0057 , H04L2027/0087
摘要： A frequency error in the oscillation frequency of a local frequency generation loop causes a change in the baseband input signal frequency. The change in the baseband input signal frequency related to the frequency error in the local frequency generation loop can be detected as a phase rotation by the frequency error discriminator. By using the digital automatic frequency control loop, the frequency error introduced by the local frequency generation is determined with accuracy. The frequency error and corresponding control bits are entered into a calibration table. The calibration table may be use to adjust the local oscillation frequency for temperature changes, pilot frequency searching, and quick paging.
摘要翻译：根据所公开的实施例，使用包括与数字自动频率控制环路中的频率误差鉴别器结合的数字旋转器的接收器来获得用于校准本地振荡频率的精确数字值。本地频率产生环路的振荡频率的频率误差导致基带输入信号频率的变化。与本地频率产生回路中的频率误差相关的基带输入信号频率的变化可以被频率误差鉴别器检测为相位旋转。通过使用数字自动频率控制环路，准确地确定由本地频率产生引入的频率误差。将频率误差和相应的控制位输入校准表。校准表可用于调整温度变化，导频检索和快速寻呼的本地振荡频率。

58. 发明公开

EP1340321A1 METHOD AND APPARATUS FOR COMPENSATING FOR FREQUENCY DRIFT IN A LOW FREQUENCY SLEEP CLOCK WITHIN A MOBILE STATION OPERATING IN A SLOTTED PAGING MODE 审中-公开
标题翻译：方法和设备在不同的低频备用时钟的移动台在寻呼时间SLOT过程的工作频率的补偿
公开(公告)号：EP1340321A1
公开(公告)日：2003-09-03
申请号：EP00982520.9
申请日：2000-12-07
申请人： QUALCOMM INCORPORATED
发明人： CHALLA, Raghu , BARGHOUTI, Ihab
IPC分类号： H04B1/16 , H04Q7/32
CPC分类号： H04W52/029 , Y02D70/144
摘要： A method and apparatus is described for tracking the length of a sleep period within a mobile station using a sleep clock to precisely calibrate portions of the sleep period. The sleep period subdivided into a sequence of sub-periods each of known duration wherein the durations of the sub-periods are not necessarily integer multiples of cycles of the sleep clock. Elapsed time is tracked within each individual sub-period of the sleep period using an integer sleep counter which tracks whole cycles of the sleep clock. Then any remaining fractional portions of the cycles of the sleep mode clock not accounted for by the integer sleep counter are tracked using a fractional sleep counter. The fractional sleep coutner accumulates remaining fractional portions of sleep mode cycles from one sub-period to the next. A method and apparatus is also described for estimating frequency drift with a sleep clock signal used during a slotted paging mode of operation of a wireless mobile station. An initial frequency of the sleep clock signal is determined following power-up of the mobile station. A fixed frequency drift compensation factor representative of a difference between the initial frequency of the sleep clock signal and a pre-determined nominal frequency is then determined. A dynamic frequency error compensation factor representative of a difference between the initial frequency and a current frequency of the slow clock signal is estimated. Then, throughout the slotted mode of operation, new values for the dynamic frequency compensation factor are iteratively determined by using a loop filter.
摘要翻译：的方法和装置被描述用于使用休眠时钟来精确地校准所述睡眠周期的部分跟踪的移动站内的睡眠时段的长度。睡眠周期细分成子周期的序列中每个已知持续时间worin子周期的持续时间的不一定是睡眠时钟的周期的整数倍。经过的时间是使用在其跟踪所述睡眠时钟的整个周期的整数睡眠计数器的睡眠周期的每个单独的子周期内跟踪。然后不占由整数睡眠计数器睡眠模式时钟的周期的任何剩余的分数部分被使用分数睡眠计数器跟踪。分数睡眠coutner累积从一个子周期到下一个剩余的睡眠模式周期的分数部分。因此，一个方法和装置进行说明，用于与无线移动台的动作的一个时隙寻呼模式期间使用的睡眠时钟信号来估计频率漂移。睡眠时钟信号的初始频率是确定的开采之后在移动站加电时。固定频率偏移补偿因子代表休眠时钟信号的初始频率和预先确定的标称频率之间的差的是然后确定性开采。一种动态频率误差补偿因子代表初始频率和慢时钟信号的当前频率之间的差的估计。然后，在整个操作的时隙模式，用于动态频率补偿因子的新值是迭代地确定通过使用环路滤波器开采。

59. 发明公开

EP1250763A2 MULTIPATH DOPPLER-ADJUSTED FREQUENCY TRACKING LOOP 有权
标题翻译：可重复使用的多普勒KORRIGIERTEFREQUENZNACHLAUFSCHLEIFE
公开(公告)号：EP1250763A2
公开(公告)日：2002-10-23
申请号：EP01908718.8
申请日：2001-01-26
申请人： QUALCOMM INCORPORATED
发明人： AGRAWAL, Avneesh , SIH, Gilbert , ROH, Mark , BUTLER, Brian , CHALLA, Raghu
IPC分类号： H04B1/00
CPC分类号： H04B1/7087 , H04B1/7115 , H04B1/7117 , H04B2201/70701 , H04L27/0014 , H04L2027/0032 , H04L2027/0057 , H04L2027/0087
摘要： A novel and improved method and apparatus for frequency tracking is described. Two main sources of error that contribute to the frequency difference between locally generated carriers and those used to modulate received signals include frequency offset between the two timing sources and doppler effects due to relative movement between the sources. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger (700a..700n) of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated (710) and filtered (720) to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator (706a...706n) for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error finger.

60. 发明公开

EP4294092A2 EVALUATING RADIO FREQUENCY (RF) EXPOSURE IN REAL TIME 审中-实审
公开(公告)号：EP4294092A2
公开(公告)日：2023-12-20
申请号：EP23207054.0
申请日：2019-07-03
申请人： QUALCOMM Incorporated
发明人： NADAKUDUTI, Jagadish , LU, Lin , GUCKIAN, Paul , CAI, Mingming , HAN, Junsheng , FERNANDO, Udara , CHALLA, Raghu
IPC分类号： H04W52/38
摘要： In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.

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