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1.发明授权公开(公告)号：US07684373B2
公开(公告)日：2010-03-23
申请号：US10933726
申请日：2004-09-02
IPC分类号： H04B7/216
摘要： For coverage determination and system switching, a terminal obtains pilot strength estimates for base stations in first and second wireless communication systems (e.g., packet data system and voice/data system) and received signal quality estimates for at least one serving base station in the first system. The terminal derives various metrics based on the received signal quality estimates and pilot strength estimates. The terminal may perform handoff to the second system if weak coverage is detected for the first system, a received signal quality metric (Q) for the first system is below a Qth—dn threshold, and a pilot strength metric (V) for the second system exceeds a Vth—dn threshold. The terminal may perform handoff to the first system if good coverage is detected for this system, metric Q exceeds a Qth—up threshold, or a maximum pilot strength metric (M) for the first system exceeds a Mth—up threshold.
摘要翻译： 对于覆盖确定和系统切换，终端获得第一和第二无线通信系统（例如，分组数据系统和语音/数据系统）中的基站的导频强度估计，以及在第一和第二无线通信系统中的至少一个服务基站的接收信号质量估计 系统。 终端根据接收到的信号质量估计和导频强度估计，得出各种度量。 如果针对第一系统检测到弱覆盖，则终端可以执行切换到第二系统，第一系统的接收信号质量度量（Q）低于第Q-Dn阈值，并且第二系统的导频强度度量（V） 系统超过Vth-dn阈值。 如果对于该系统检测到良好的覆盖，则终端可以执行切换到第一系统，度量Q超过Qth-up阈值，或者第一系统的最大导频强度度量（M）超过Mth-up阈值。
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2.发明授权Method and apparatus to optimize off-frequency pilot searching by wireless mobile station 失效优化无线移动台离频导频搜索的方法和装置公开(公告)号：US07623861B2
公开(公告)日：2009-11-24
申请号：US10313750
申请日：2002-12-05
CPC分类号： H04W48/20 , H04W52/0225 , H04W52/0245 , Y02D70/00
摘要： A wireless mobile telephone (400) is operated so as manage the performance of “off-frequency searches,” that is, searches for base station pilot signals that differ in frequency from the pilot signals in the mobile station's active set. Whenever frequency searching is performed (such as responsive to emerging from a reduced-power sleep mode), the mobile station performs on-frequency pilot signal searching (902) upon a prescribed active set frequency. Only if a prescribed off-frequency searching condition (903-908) is satisfied, the mobile station additionally performs off-frequency pilot signal searching (912) upon one or more neighboring base stations' frequencies.
摘要翻译： 操作无线移动电话（400）以便管理“偏离频率搜索”的性能，即，搜索与移动台的活动集中的导频信号不同的基站导频信号。 无论何时执行频率搜索（例如响应于从低功耗睡眠模式出来），移动台根据规定的活动设定频率执行频率导频信号搜索（902）。 只有满足规定的偏频搜索条件（903-908）时，移动台在一个或多个相邻基站的频率上附加地执行非频率导频信号搜索（912）。
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3.发明授权Method and apparatus for demodulating signals processed in a transmit diversity mode 有权用于解调以发射分集模式处理的信号的方法和装置公开(公告)号：US07623566B2
公开(公告)日：2009-11-24
申请号：US11624194
申请日：2007-01-17
CPC分类号： H04B1/70751 , H04B1/70752 , H04B1/708 , H04B1/709 , H04B7/0613 , H04J13/004
摘要： Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered “half-symbols” and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the length (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodulated symbols. One or more correlators can be assigned to process one or more instances of each transmitted signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being processed by that correlator.
摘要翻译： 用于在无线通信系统中处理接收信号的解调器架构。 解调器包括耦合到组合器的多个相关器。 每个相关器通常以相应的解扩序列接收和解扩输入采样（其从接收信号产生），以提供解扩样本。 每个相关器然后解码解扩样本以提供去除的“半符号”，并且用导频估计进一步解调已解除的半符号以产生相关符号。 使用具有用于覆盖发送信号中的数据符号的沃尔什符号的长度（2T）的一半的长度（T）的沃尔什符号执行解复用。 组合器选择性地组合来自所分配的相关器的相关符号以提供解调符号。 可以分配一个或多个相关器来处理每个发射信号的一个或多个实例。 在每个分配的相关器内使用的导频估计是根据该相关器正在处理的信号实例产生的。
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4.发明授权Method and apparatus for demodulating signals processed in a transmit diversity mode 有权用于解调以发射分集模式处理的信号的方法和装置公开(公告)号：US07684474B2
公开(公告)日：2010-03-23
申请号：US11624198
申请日：2007-01-17
CPC分类号： H04B1/70751 , H04B1/70752 , H04B1/708 , H04B1/709 , H04B7/0613 , H04J13/004
摘要： Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered “half-symbols” and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the length (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodulated symbols. One or more correlators can be assigned to process one or more instances of each transmitted signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being processed by that correlator.
摘要翻译： 用于在无线通信系统中处理接收信号的解调器架构。 解调器包括耦合到组合器的多个相关器。 每个相关器通常以相应的解扩序列接收和解扩输入采样（其从接收信号产生），以提供解扩样本。 每个相关器然后解码解扩样本以提供去除的“半符号”，并且用导频估计进一步解调已解除的半符号以产生相关符号。 使用具有用于覆盖发送信号中的数据符号的沃尔什符号的长度（2T）的一半的长度（T）的沃尔什符号执行解复用。 组合器选择性地组合来自所分配的相关器的相关符号以提供解调符号。 可以分配一个或多个相关器来处理每个发射信号的一个或多个实例。 在每个分配的相关器内使用的导频估计是根据该相关器正在处理的信号实例产生的。
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公开(公告)号：US07493131B2
公开(公告)日：2009-02-17
申请号：US10097039
申请日：2002-03-12
CPC分类号： H04W52/282 , H04W52/60
摘要： The velocity of a wireless communications device (WCD) (106) is estimated. In response to this estimate a power control command rate is determined. The WCD 106 transmits power control signals to a base station (102) according to the power control command rate. The power control command rate may be determined by mapping the estimated velocity to a velocity range, and selecting a rate that corresponds to the velocity range as the power control command rate. Velocity is estimated by measuring a level crossing rate of a multipath signal.
摘要翻译： 估计无线通信设备（WCD）（106）的速度。 响应于该估计，确定功率控制命令速率。 WCD 106根据功率控制命令速率向基站（102）发送功率控制信号。 功率控制命令速率可以通过将估计的速度映射到速度范围，并且选择与速度范围对应的速率作为功率控制命令速率来确定。 通过测量多路径信号的电平穿越率来估计速度。
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6.发明授权Method and apparatus for performing acquisition in power save mode for wireless communication systems 有权用于在无线通信系统的节电模式下进行采集的方法和装置公开(公告)号：US07295857B2
公开(公告)日：2007-11-13
申请号：US10447630
申请日：2003-05-28
IPC分类号： H04M1/00
CPC分类号： H04W48/18 , H04W88/06 , Y02D70/1224
摘要： Techniques to efficiently attempt acquisition of a packet data system (e.g., an IS-856 system). If a terminal has acquired one or more channels in a voice/data system (e.g., an IS-2000 system), then it can attempt acquisition on channels in the packet data system that are co-located with the acquired channels in the voice/data system. Multiple acquisition modes may be used, and on-going acquisition attempts on the co-located channels may be performed using one acquisition mode at a time in order to reduce power consumption. Acquisition attempts may be performed in a “ping-pong” manner to improve the likelihood of acquisition. For a ping-pong search, an acquisition attempt is made on the most recently acquired channel prior to an acquisition attempt on each of the remaining channels. Received signal strength estimates may also be obtained for selected channels and may be used to determine whether or not to attempt acquisition on these channels.
摘要翻译： 有效地尝试采集分组数据系统（例如，IS-856系统）的技术。 如果终端已经在语音/数据系统（例如，IS-2000系统）中获取了一个或多个信道，则它可以尝试在分组数据系统中与语音/数据系统中所获取的信道共同位置的信道上的采集， 数据系统 可以使用多个采集模式，并且可以一次使用一个采集模式来执行同位置信道上的持续采集尝试，以便降低功耗。 收购尝试可以以“乒乓”方式进行，以提高获取的可能性。 对于乒乓搜索，在对每个剩余通道进行采集尝试之前，在最近获取的通道上进行采集尝试。 也可以对所选择的信道获得接收的信号强度估计，并且可以用于确定是否尝试在这些信道上进行采集。
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公开(公告)号：US20070116102A1
公开(公告)日：2007-05-24
申请号：US11624198
申请日：2007-01-17
IPC分类号： H04B1/00
CPC分类号： H04B1/70751 , H04B1/70752 , H04B1/708 , H04B1/709 , H04B7/0613 , H04J13/004
摘要： Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered “half-symbols” and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the length (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodulated symbols. One or more correlators can be assigned to process one or more instances of each transmitted signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being processed by that correlator.
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8.发明申请Method and Apparatus for Determining Coverage and Switching Between Overlay Communication Systems 审中-公开确定叠加通信系统覆盖和切换的方法和装置公开(公告)号：US20090163209A1
公开(公告)日：2009-06-25
申请号：US12249726
申请日：2008-10-10
IPC分类号： H04W36/00
摘要： Techniques to determine whether or not a terminal is under the coverage of a current wireless communication system (e.g., a packet data system) and to switch from the current system to another wireless communication system (e.g., a voice/data system). In one method, at least one measurement of at least one parameter for at least one base station in the current system is initially obtained. The measurement(s) may be SNR measurements. A metric is derived based on the measurement(s) and used (typically along with a metric threshold and a timer) to determine whether or not the terminal is within the coverage of the current system. A switch to another system is initiated if the terminal is deemed to be outside the coverage of the current system. The two systems provide at least one common service (e.g., packet data service).
摘要翻译： 确定终端是否处于当前无线通信系统（例如，分组数据系统）的覆盖范围内并且从当前系统切换到另一个无线通信系统（例如，语音/数据系统）的技术。 在一种方法中，首先获得当前系统中至少一个基站的至少一个参数的至少一个测量。 测量可以是SNR测量。 基于测量并使用（通常与度量阈值和定时器）来导出度量，以确定终端是否在当前系统的覆盖范围内。 如果终端被认为在当前系统的覆盖范围之外，则启动到另一个系统的切换。 两个系统提供至少一个公共服务（例如，分组数据服务）。
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9.发明授权Signal-to-noise estimation in wireless communication devices with receive diversity 失效具有接收分集的无线通信设备中的信噪比估计公开(公告)号：US07366137B2
公开(公告)日：2008-04-29
申请号：US10448815
申请日：2003-05-31
IPC分类号： H04Q7/00
CPC分类号： H04B1/1027 , H04B17/336 , H04W52/143 , H04W52/241 , H04W52/248
摘要： This disclosure is directed to techniques for estimating signal-to-noise ratio (SNR) of signals received by a wireless communication device. The techniques take advantage of spatial receive diversity in a wireless communication device to achieve accurate estimates of SNR. In general, a spatial projection wiener filter function can be applied to incoming symbol estimates to support efficient computation of SNR. The estimated SNR can be used to produce power control commands for use in forward power control.
摘要翻译： 本公开涉及用于估计由无线通信设备接收的信号的信噪比（SNR）的技术。 这些技术利用无线通信设备中的空间接收分集来实现SNR的准确估计。 通常，空间投影维纳滤波函数可以应用于输入符号估计，以支持SNR的有效计算。 估计的SNR可用于产生用于正向功率控制的功率控制命令。
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10.发明申请METHOD AND APPARATUS FOR DEMODULATING SIGNALS PROCESSED IN A TRANSMIT DIVERSITY MODE 有权用于在发射多样性模式下处理信号的方法和装置公开(公告)号：US20070116101A1
公开(公告)日：2007-05-24
申请号：US11624194
申请日：2007-01-17
IPC分类号： H04B1/00
CPC分类号： H04B1/70751 , H04B1/70752 , H04B1/708 , H04B1/709 , H04B7/0613 , H04J13/004
摘要： Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered “half-symbols” and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the length (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodulated symbols. One or more correlators can be assigned to process one or more instances of each transmitted signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being processed by that correlator.
摘要翻译： 用于在无线通信系统中处理接收信号的解调器架构。 解调器包括耦合到组合器的多个相关器。 每个相关器通常以相应的解扩序列接收和解扩输入采样（其从接收信号产生），以提供解扩样本。 每个相关器然后解码解扩样本以提供去除的“半符号”，并且用导频估计进一步解调已解除的半符号以产生相关符号。 使用具有用于覆盖发送信号中的数据符号的沃尔什符号的长度（2T）的一半的长度（T）的沃尔什符号执行解复用。 组合器选择性地组合来自所分配的相关器的相关符号以提供解调符号。 可以分配一个或多个相关器来处理每个发射信号的一个或多个实例。 在每个分配的相关器内使用的导频估计是根据该相关器正在处理的信号实例产生的。
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