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公开(公告)号：US07852971B2
公开(公告)日：2010-12-14
申请号：US11491210
申请日：2006-07-21
IPC分类号： H04L27/00
CPC分类号： H04B1/7075 , H04B1/70775 , H04B1/7117 , H04B2001/70706 , H04L27/0014
摘要： Techniques for detecting acquisition of a false channel in a wireless communication system are described. For false channel detection, a peak corresponding to a signal from a base station is initially detected. Frequency acquisition and time tracking of the peak are then performed. The frequency acquisition attempts to determine and correct downconversion frequency error. The time tracking attempts to follow the peak as it moves due to sample timing error and/or changes in channel conditions. Whether the signal is from a desired frequency channel or a false frequency channel is determined based on the time tracking. If a false channel is acquired, then the sampling timing will be either too slow or too fast, and the peak will move at a fast rate. A false channel may be detected based on the movement of the peak.
摘要翻译： 描述用于检测无线通信系统中的虚信道的获取的技术。 对于伪信道检测，初始检测到对应于来自基站的信号的峰值。 然后进行峰值的频率采集和时间跟踪。 频率采集尝试确定和修正下变频频率误差。 由于采样定时误差和/或信道条件的变化，时间跟踪尝试跟随峰值。 基于时间跟踪确定信号是来自期望的频道还是假频道。 如果获取了虚假通道，则采样时间将太慢或太快，并且峰值将以快速速率移动。 可以基于峰值的移动来检测虚信道。
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公开(公告)号：US20080019427A1
公开(公告)日：2008-01-24
申请号：US11491210
申请日：2006-07-21
CPC分类号： H04B1/7075 , H04B1/70775 , H04B1/7117 , H04B2001/70706 , H04L27/0014
摘要： Techniques for detecting acquisition of a false channel in a wireless communication system are described. For false channel detection, a peak corresponding to a signal from a base station is initially detected. Frequency acquisition and time tracking of the peak are then performed. The frequency acquisition attempts to determine and correct downconversion frequency error. The time tracking attempts to follow the peak as it moves due to sample timing error and/or changes in channel conditions. Whether the signal is from a desired frequency channel or a false frequency channel is determined based on the time tracking. If a false channel is acquired, then the sampling timing will be either too slow or too fast, and the peak will move at a fast rate. A false channel may be detected based on the movement of the peak.
摘要翻译： 描述用于检测无线通信系统中的虚信道的获取的技术。 对于伪信道检测，初始检测到对应于来自基站的信号的峰值。 然后进行峰值的频率采集和时间跟踪。 频率采集尝试确定和修正下变频频率误差。 由于采样定时误差和/或信道条件的变化，时间跟踪尝试跟随峰值。 基于时间跟踪确定信号是来自期望的频道还是假频道。 如果获取了虚假通道，则采样时间将太慢或太快，并且峰值将以快速速率移动。 可以基于峰值的移动来检测虚信道。
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公开(公告)号：US07812582B2
公开(公告)日：2010-10-12
申请号：US11532000
申请日：2006-09-14
申请人： Lew G. Chua-Eoan , Boris Andreev , Christopher C. Riddle , Chunlei Shi , Justin Joseph Rosen Gagne , Seong-Ook Jung , Thomas R. Toms
发明人： Lew G. Chua-Eoan , Boris Andreev , Christopher C. Riddle , Chunlei Shi , Justin Joseph Rosen Gagne , Seong-Ook Jung , Thomas R. Toms
IPC分类号： G05F1/40
CPC分类号： H02M3/158 , H02M2001/0032 , H02M2001/0045 , H02M2001/009 , Y02B70/16
摘要： A device is disclosed that includes a first pin to supply power to a first power domain of an integrated circuit, a second pin to supply power to a second power domain of the integrated circuit, a switching regulator and a controller. The switching regulator is coupled to the first pin to provide a first regulated power supply to the first power domain and is coupled to the second pin to provide a second regulated power supply to the second power domain. The controller is coupled to the first pin and to the second pin to selectively reduce current flow to at least the second pin during a low power event.
摘要翻译： 公开了一种器件，其包括用于向集成电路的第一电源域供电的第一引脚，向集成电路的第二电源域供电的第二引脚，开关稳压器和控制器。 开关调节器耦合到第一引脚，以向第一功率域提供第一稳压电源，并且耦合到第二引脚以向第二功率域提供第二稳压电源。 控制器耦合到第一引脚和第二引脚，以在低功率事件期间选择性地减少至少第二引脚的电流。
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公开(公告)号：US6130923A
公开(公告)日：2000-10-10
申请号：US209356
申请日：1998-12-11
IPC分类号： H04B1/7115 , H04B1/7117 , H04B1/712 , H04B7/26 , H04L1/02
CPC分类号： H04B1/7115 , H04B1/7117 , H04B1/712
摘要： A wireless receiver receiving multipath Wash-code symbols determines which of fingers 402, 410 have locked on a signal. Measurements of the correlation energies between the received signal and all possible symbols are stored in energy storage units 404, 412. The actual signals are combined in combiner 408. A maximum determiner 416 determines the most likely combined symbol, and an index for this symbol is fed back to the energy storage units. Lock detectors 406, 414 use the measurement for this fed-back symbol to determine whether the finger has locked onto a path. This determination is used to decide whether the next signal detected by that finger should be applied to the combiner.
摘要翻译： 接收多路径的无线接收器清洗码符号确定指针402,410中的哪一个锁定在信号上。 接收信号与所有可能符号之间的相关能量的测量被存储在能量存储单元404,412中。实际信号在组合器408中组合。最大确定器416确定最可能的组合符号，并且该符号的索引为 反馈给储能装置。 锁定检测器406,414使用该反馈符号的测量来确定手指是否锁定在路径上。 该确定用于确定由该手指检测到的下一个信号是否应该应用于组合器。
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公开(公告)号：US20080067995A1
公开(公告)日：2008-03-20
申请号：US11532000
申请日：2006-09-14
申请人： Lew G. Chua-Eoan , Boris Andreev , Christopher C. Riddle , Chunlei Shi , Justin Joseph Rosen Gagne , Seong-Ook Jung , Thomas R. Toms
发明人： Lew G. Chua-Eoan , Boris Andreev , Christopher C. Riddle , Chunlei Shi , Justin Joseph Rosen Gagne , Seong-Ook Jung , Thomas R. Toms
IPC分类号： G05F1/00
CPC分类号： H02M3/158 , H02M2001/0032 , H02M2001/0045 , H02M2001/009 , Y02B70/16
摘要： A device is disclosed that includes a first pin to supply power to a first power domain of an integrated circuit, a second pin to supply power to a second power domain of the integrated circuit, a switching regulator and a controller. The switching regulator is coupled to the first pin to provide a first regulated power supply to the first power domain and is coupled to the second pin to provide a second regulated power supply to the second power domain. The controller is coupled to the first pin and to the second pin to selectively reduce current flow to at least the second pin during a low power event.
摘要翻译： 公开了一种器件，其包括用于向集成电路的第一电源域供电的第一引脚，向集成电路的第二电源域供电的第二引脚，开关稳压器和控制器。 开关调节器耦合到第一引脚，以向第一功率域提供第一稳压电源，并且耦合到第二引脚以向第二功率域提供第二稳压电源。 控制器耦合到第一引脚和第二引脚，以在低功率事件期间选择性地减少至少第二引脚的电流。
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公开(公告)号：US06229839B1
公开(公告)日：2001-05-08
申请号：US09246446
申请日：1999-02-08
IPC分类号： H04L2730
CPC分类号： H04B1/7085
摘要： In order to time track an incoming signal, a receiver demodulates a first instance of a signal to produce a first set of energy values corresponding to a set of possible data values of the signal. The receiver also demodulates a second instance of the signal to produce a second set of energy values corresponding to the set of possible data values. The receiver combines the first and the second sets of energy values to determine a combined set of energy values. The receiver determines a first estimate of a most likely transmitted data value based upon the combined set of energy values. The receiver decovers an early set of despread samples of the first instance using a symbol corresponding to the first estimate to produce a first early energy value. The receiver decovers a late set of despread samples of the first instance using the symbol corresponding to the first estimate to produce a first late energy value. Finally, the receiver determines a time offset of the first instance based upon the first early and the first late energy values.
摘要翻译： 为了时间跟踪输入信号，接收机解调信号的第一实例以产生对应于信号的一组可能数据值的第一组能量值。 接收机还解调信号的第二实例以产生对应于该组可能数据值的第二组能量值。 接收器组合第一和第二组能量值以确定能量值的组合。 接收机基于组合的能量值来确定最可能发送的数据值的第一估计。 接收机使用对应于第一估计的符号来解码第一实例的早期解扩样本集合以产生第一早期能量值。 接收机使用对应于第一估计的符号来解码第一实例的延迟的解扩样本集，以产生第一晚能量值。 最后，接收机基于第一早期和第一后期能量值来确定第一实例的时间偏移。
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公开(公告)号：US06201827B1
公开(公告)日：2001-03-13
申请号：US09150498
申请日：1998-09-09
IPC分类号： H04L2730
CPC分类号： H04B7/2628 , H04B1/709 , H04B1/7115 , H04B1/712
摘要： The probability based lock detection circuit determines whether a signal is sufficiently strong for communications in a mobile telecommunications system. If a signal is below a maximum energy threshold, the probability based lock detection is used to determine if the receiver is sufficiently capable to detect the signal and combine the signal with other signals received to obtain data transmitted by a mobile telephone. The probability based lock detection involves comparing index representations of maximums of 64 possible energies sent by the mobile telephone that identify that the signal was sent by mobile telephone. A mobile telephone sends signal that arrives to a base station through multiple paths to ensure accurate data transmission. Each signal includes data that identifies the mobile telephone. The probability based lock detection circuit determines whether the index of the maximum of 64 possible values of a signal sent to identify the mobile telephone is the same as the index of the maximum of the 64 possible values as calculated by combining all of signals sent by the mobile telephone.
摘要翻译： 基于概率的锁定检测电路确定信号对于移动电信系统中的通信是否足够强。 如果信号低于最大能量阈值，则使用基于概率的锁定检测来确定接收机是否足够能够检测信号并将信号与接收的其他信号组合以获得由移动电话发送的数据。 基于概率的锁定检测涉及比较由移动电话发送的识别由移动电话发送的信号的最大64个可能能量的索引表示。 移动电话通过多个路径发送到基站的信号，以确保准确的数据传输。 每个信号包括识别移动电话的数据。 基于概率的锁定检测电路确定发送以识别移动电话的信号的最大值64个可能值的索引与通过组合由所述移动电话发送的所有信号的所有信号计算的64个可能值的最大值的索引相同 移动电话。
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公开(公告)号：US08014476B2
公开(公告)日：2011-09-06
申请号：US11269360
申请日：2005-11-07
IPC分类号： H04L27/06
CPC分类号： H04B1/38 , H03J7/10 , H03J2200/01 , H03J2200/10 , H04L27/2332 , H04L2027/0036 , H04L2027/0055 , H04L2027/0065 , H04L2027/0087
摘要： A wireless device achieves good performance using a crystal oscillator that is not compensated for temperature. The crystal oscillator provides a reference signal having a temperature dependent frequency error. A control unit estimates the frequency error (e.g., based on a received pilot) and provides a frequency error estimate. A clock generator generates a digital clock, which tracks chip timing, based on the reference signal and the frequency error estimate. A receiver frequency downconverts an input RF signal with a receive LO signal having the frequency error and provides an analog baseband signal. An ADC digitizes the analog baseband signal based on a sampling clock having the frequency error and provides ADC samples. A re-clocking circuit re-clocks the ADC samples based on a digital clock and provides data samples. A digital rotator frequency translates the data samples based on the frequency error estimate and provides frequency-translated samples centered near DC.
摘要翻译： 无线设备使用不补偿温度的晶体振荡器实现良好的性能。 晶体振荡器提供具有温度相关频率误差的参考信号。 控制单元估计频率误差（例如，基于接收到的导频）并提供频率误差估计。 时钟发生器基于参考信号和频率误差估计器产生跟踪芯片定时的数字时钟。 接收机使用具有频率误差的接收LO信号对输入RF信号进行下变频并提供模拟基带信号。 ADC根据具有频率误差的采样时钟数字化模拟基带信号，并提供ADC采样。 重新计时电路根据数字时钟对ADC采样进行重新计时，并提供数据采样。 数字旋转器频率基于频率误差估计来转换数据样本，并提供以DC为中心的频率转换样本。
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9.发明授权Reliability determination and combining of power control commands received in a wireless communication system 有权在无线通信系统中接收的功率控制命令的可靠性确定和组合公开(公告)号：US07340268B2
公开(公告)日：2008-03-04
申请号：US10457846
申请日：2003-06-10
申请人： Hyukjun Oh , Parvathanathan Subrahmanya , Nitin Kasturi , Messay Amerga , Chih-Ping Hsu , Christopher C. Riddle , Andrew Sendonaris
发明人： Hyukjun Oh , Parvathanathan Subrahmanya , Nitin Kasturi , Messay Amerga , Chih-Ping Hsu , Christopher C. Riddle , Andrew Sendonaris
摘要： The reliability of transmit power control (TPC) commands received from a transmitter is determined based on a TPC target value. The TPC target value is derived based on a TPC threshold and possibly a weight, depending on the receiver implementation. A received TPC command is considered reliable if its absolute value exceeds the TPC target value. Received TPC commands deemed as unreliable are discarded and not used for power control. Multiple TPC target values, used for detecting UP and DOWN commands, may be derived with multiple scaling factors. For a receiver in soft handover and receiving TPC commands from multiple transmitters, a different TPC target value may be derived for each transmitter. The received TPC commands for each transmitter are compared against that transmitter's TPC target value. Received TPC commands deemed as unreliable are discarded and not combined.
摘要翻译： 基于TPC目标值确定从发射机接收的发射功率控制（TPC）命令的可靠性。 TPC目标值基于TPC阈值和可能的权重导出，这取决于接收机实现。 如果接收到的TPC命令的绝对值超过TPC目标值，则认为它是可靠的。 被认为不可靠的TPC命令被丢弃，不用于功率控制。 用于检测UP和DOWN命令的多个TPC目标值可以用多个缩放因子导出。 对于软切换中的接收机和从多个发射机接收TPC命令，可以为每个发射机导出不同的TPC目标值。 每个发射机接收的TPC命令与该发射机的TPC目标值进行比较。 被认为不可靠的TPC命令被丢弃并不组合。
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公开(公告)号：US06600792B2
公开(公告)日：2003-07-29
申请号：US09105532
申请日：1998-06-26
IPC分类号： H04L2549
CPC分类号： H03F1/3247 , H03F1/3241 , H03F2201/3233
摘要： A predistortion technique for high power amplifiers includes an adaptive predistortion algorithm that operates independently of data samples to write a set of complex gain values, or predistortion parameters, to a lookup table. The algorithm may be processor-driven. The gain values are taken from the lookup table and multiplied by a complex digital baseband waveform. The gain values may first be subjected to interpolation. The downconverted output of the amplifier is measured to gauge the efficacy of the predistortion. Based on the effect of the predistortion upon the ratio of in-band power to out-of-band power, decisions are made on the set of predistortion parameters for the next iteration of the algorithm. The algorithm runs continuously, perturbing parameters and adapting the predistortion functions accordingly in an effort to continually reflect instantaneous amplitude-modulation and phase-modulation relationships that may change over time with temperature variation or component aging.
摘要翻译： 用于高功率放大器的预失真技术包括自适应预失真算法，其独立于数据样本操作以将一组复增益值或预失真参数写入查找表。 算法可能是处理器驱动的。 增益值取自查表，并乘以复数数字基带波形。 增益值可以首先进行插值。 测量放大器的下变频输出以测量预失真的功效。 基于预失真对带内功率与带外功率之比的影响，决定了该算法下一次迭代的预失真参数集。 该算法连续运行，扰动参数并相应地调整预失真函数，以努力连续反映随着温度变化或分量老化而随时间变化的瞬时幅度调制和相位调制关系。
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