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公开(公告)号：US06724247B2
公开(公告)日：2004-04-20
申请号：US10234180
申请日：2002-09-05
IPC分类号： H03D300
摘要： An FM demodulator compensates for DC offset by detecting the positive peak value of the frequency demodulated signal (D1, C2, R1) and the negative peak value of the frequency demodulated signal (D2, C3, R2). The mean of the positive and negative peak values is determined (C1, R3, R4) to produce an estimation of a DC offset value. This estimated DC offset value is then used to compensate for DC offset in the frequency demodulated signal. This circuit has the advantage of enabling the DC offset to be calculated without requiring complex digital signalling processing, and without requiring the input signal to have a zero mean. A signal strength signal RSSI may be used to disconnect the DC offset compensation circuitry during periods when the input signal strength is weak.
摘要翻译： FM解调器通过检测频率解调信号（D1，C2，R1）的正峰值和频率解调信号（D2，C3，R2）的负峰值来补偿DC偏移。 确定正和负峰值的平均值（C1，R3，R4）以产生DC偏移值的估计。 然后使用该估计的DC偏移值来补偿频率解调信号中的DC偏移。 该电路具有使得能够计算DC偏移而不需要复杂的数字信号处理，而不需要输入信号具有零均值的优点。 信号强度信号RSSI可以用于在输入信号强度较弱的时段断开DC偏移补偿电路。
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公开(公告)号：US07016372B2
公开(公告)日：2006-03-21
申请号：US10079572
申请日：2002-02-22
申请人： Jacobus C. Haartsen
发明人： Jacobus C. Haartsen
IPC分类号： H04L12/43
摘要： One of a number, n, of slave devices is selected for express or implicit polling by a master device in a communication system that transmits during individual ones of a number of sequentially occurring time slots. This is done by assigning a corresponding priority level to each slave device, wherein at least two slave devices are assigned different corresponding priority levels. A corresponding count parameter and a corresponding initial count value are assigned to each of the slave devices. For each of the slave devices, the corresponding count parameter is initialized to the corresponding initial count value. For each successive time slot, each of the count parameters is adjusted (e.g., by decrementing). A highest priority slave device whose corresponding count parameter has reached or passed a predetermined value is selected for polling.
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公开(公告)号：US4998261A
公开(公告)日：1991-03-05
申请号：US450891
申请日：1989-12-14
IPC分类号： H04B1/707
CPC分类号： H04B1/7093 , H04B1/70712
摘要： In a digital data receiver (80) for demodulating a direct sequence spread spectrum differential phase shift keyed data signal, the signal is applied to the input transducer (140) of a SAW device (100) which has first and second output transducers (142, 144) spaced apart on the SAW substrate (130) so as to produce first and second output signals on output lines (102, 104), which are relatively delayed by a time corresponding to a symbol period. The output transducers are of identical construction and are matched to the spread spectrum code utilized in the data signal. Thus, a single SAW device (100) effects both correlation and delay. The output signals on the output lines (102, 104) are processed by a circuit including multipliers (106, 110) and a phase shifter (108) to produce output data signals representing the received data.
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公开(公告)号：US06473412B1
公开(公告)日：2002-10-29
申请号：US09272212
申请日：1999-03-19
申请人： Jacobus C. Haartsen
发明人： Jacobus C. Haartsen
IPC分类号： H04Q700
CPC分类号： H04W48/14 , H04B1/713 , H04B7/2621 , H04W56/00
摘要： An uncoordinated frequency hopping cellular system includes a mobile unit and a number of base stations. The mobile unit determines which base stations are in a geographical location defined by a location of the mobile unit. This determination is made by transmitting one or more inquiry messages, and receiving response information transmitted by responding base stations. The mobile unit then selects, for use by the mobile unit, one of the base stations from the set of base stations. Each of the base stations receives at least one of the inquiry messages, and transmits the response information to the mobile unit in response to the at least one received inquiry message. The mobile unit determines synchronization information from the response information, and uses this to establish communication with the selected base station.
摘要翻译： 不协调的跳频蜂窝系统包括移动单元和多个基站。 移动单元确定哪些基站在由移动单元的位置定义的地理位置中。 通过发送一个或多个查询消息和接收响应基站发送的响应信息来进行该确定。 移动单元然后从移动单元中选择一组基站中的一个基站。 每个基站接收至少一个查询消息，并且响应于所接收的至少一个查询消息将响应信息发送到移动单元。 移动单元根据响应信息确定同步信息，并使用它来建立与所选基站的通信。
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5.发明授权Method and system for autonomously allocating a cellular communications channel for communication between a cellular terminal and a telephone base station 失效用于自动分配用于蜂窝终端和电话基站之间的通信的蜂窝通信信道的方法和系统
公开(公告)号：US5884145A
公开(公告)日：1999-03-16
申请号：US704846
申请日：1996-08-28
申请人： Jacobus C. Haartsen
发明人： Jacobus C. Haartsen
IPC分类号： H04W16/10 , H04W16/12 , H04W16/14 , H04W16/16 , H04W72/08 , H04W84/04 , H04B1/10 , H04B15/00
CPC分类号： H04W72/082 , H04W16/10 , H04W16/12 , H04W16/16 , H04W84/042 , H04W84/105
摘要： An allocation method and system for allocating a least-interference communications channel between a cellular system and a private radio system within the cellular system. A set of candidate channels are first selected and ordered by the amount of interference present within the cellular system, and a subset thereof is selected. A second set of candidate channels are then selected from the subset and ordered by the amount of interference present in the private radio system environment, and a safe channel subset thereof is selected. That channel exhibiting the least amount of interference is then selected from the safe channel subset as the communications channel.
摘要翻译： 一种用于在蜂窝系统和蜂窝系统内的专用无线电系统之间分配最小干扰通信信道的分配方法和系统。 首先选择一组候选信道并按照蜂窝系统内存在的干扰量进行排序，并选择其子集。 然后从子集中选择第二组候选信道，并按照专用无线电系统环境中存在的干扰量进行排序，并选择其安全信道子集。 然后，从作为通信信道的安全信道子集中选择出现最少干扰的信道。
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6.发明授权Method and system for autonomously allocating transmit power levels for communication between a cellular terminal and a telephone base station 失效用于自动分配用于蜂窝终端和电话基站之间的通信的发射功率电平的方法和系统
公开(公告)号：US5794157A
公开(公告)日：1998-08-11
申请号：US704847
申请日：1996-08-28
申请人： Jacobus C. Haartsen
发明人： Jacobus C. Haartsen
CPC分类号： H04W52/343 , H04W16/16 , H04W52/244 , H04W52/346 , H04W16/10 , H04W52/143 , H04W52/367
摘要： A private radio system within a serving cell of a cellular communications system periodically monitors the broadcast information transmitted on the control channels of the serving and surrounding cells. From this monitoring, all those carrier frequencies serving as control channels are derived for the cell areas around the serving cell and a control channel list constructed. The private radio system then carries out signal strength measurements on the downlink control channels, and orders the control channel list accordingly. Alternatively, a mobile station that is attached to a private radio system can perform the downlink measurements and forward the measurements to the private radio system. In either event, the private radio system selects a communication channel from the ordered list and derives, from the received signal strength values of the control channels, the transmit power level required to both overcome interference caused by more distant cellular base stations and, at the same time, not interfere with those stations.
摘要翻译： 蜂窝通信系统的服务小区内的专用无线电系统周期性地监视在服务小区和周围小区的控制信道上发送的广播信息。 从该监视中，为服务小区周围的小区区域和构成的控制信道列表导出用作控制信道的所有载波频率。 专用无线电系统然后对下行链路控制信道执行信号强度测量，并相应地命令控制信道列表。 或者，附接到专用无线电系统的移动台可以执行下行链路测量并将测量转发到专用无线电系统。 在任一情况下，专用无线电系统从有序列表中选择通信信道，并根据控制信道的接收信号强度值导出克服由更远的蜂窝基站引起的干扰所需的发射功率电平，并且在 同时不要干扰那些台站。
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公开(公告)号：US08188851B2
公开(公告)日：2012-05-29
申请号：US12434738
申请日：2009-05-04
申请人： Jacobus C. Haartsen
发明人： Jacobus C. Haartsen
IPC分类号： G08B1/00
CPC分类号： G06F1/3287 , G06F1/3215 , H04M1/6066 , H04M2250/02 , H04M2250/12 , H04W52/0274 , Y02D10/171 , Y02D70/1224 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/166 , Y02D70/168 , Y02D70/23 , Y02D70/26
摘要： An electronic device may include a wireless transceiver for establishing a wireless interface with a wireless transceiver of another device. The electronic device may further include a wake-up assembly including a permanent magnet that generates a magnet field and a sensor that outputs a signal corresponding to sensed magnetic field. A control assembly of the electronic device may be configured to control at least one of activation or deactivation of the wireless transceiver when the output from the sensor indicates that the magnetic field of the permanent magnet has been disturbed by presence of a magnet external to the electronic device.
摘要翻译： 电子设备可以包括用于与另一设备的无线收发器建立无线接口的无线收发器。 电子设备还可以包括包括产生磁场的永磁体和输出对应于感测磁场的信号的传感器的唤醒组件。 电子设备的控制组件可以被配置为当传感器的输出指示永磁体的磁场已被电子外部的磁体的存在所干扰时，控制无线收发器的激活或去激活中的至少一个 设备。
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公开(公告)号：US20100277304A1
公开(公告)日：2010-11-04
申请号：US12434738
申请日：2009-05-04
申请人： Jacobus C. Haartsen
发明人： Jacobus C. Haartsen
CPC分类号： G06F1/3287 , G06F1/3215 , H04M1/6066 , H04M2250/02 , H04M2250/12 , H04W52/0274 , Y02D10/171 , Y02D70/1224 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/166 , Y02D70/168 , Y02D70/23 , Y02D70/26
摘要： An electronic device may include a wireless transceiver for establishing a wireless interface with a wireless transceiver of another device. The electronic device may further include a wake-up assembly including a permanent magnet that generates a magnet field and a sensor that outputs a signal corresponding to sensed magnetic field. A control assembly of the electronic device may be configured to control at least one of activation or deactivation of the wireless transceiver when the output from the sensor indicates that the magnetic field of the permanent magnet has been disturbed by presence of a magnet external to the electronic device.
摘要翻译： 电子设备可以包括用于与另一设备的无线收发器建立无线接口的无线收发器。 电子设备还可以包括包括产生磁场的永磁体和输出对应于感测磁场的信号的传感器的唤醒组件。 电子设备的控制组件可以被配置为当传感器的输出指示永磁体的磁场已被电子外部的磁体的存在所干扰时，控制无线收发器的激活或去激活中的至少一个 设备。
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公开(公告)号：US07483674B2
公开(公告)日：2009-01-27
申请号：US10929452
申请日：2004-08-31
IPC分类号： H04B17/00
CPC分类号： H04B17/382 , H04W72/08
摘要： A carrier frequency is selected to be used to communicate information to a transceiver in a communication system. Selecting includes, on each of one or more carrier frequencies, transmitting a probe message to the transceiver. A frequency offset between any two adjacent ones of the carrier frequencies is at least about 8 MHz. One or more response messages are received from the transceiver, wherein each of the one or more response messages is a response to a received one of the one or more probe messages. The one or more response messages are used to determine which of the one or more carrier frequencies will be used to communicate information to the transceiver. In some embodiments, each of the probe messages includes a training sequence, and information included in the one or more response messages enables selection of one of a number of possible modulation schemes to be used.
摘要翻译： 选择载波频率用于在通信系统中向收发信机传送信息。 在一个或多个载波频率中的每一个上选择包括将探测消息发射到收发机。 任何两个相邻载波频率之间的频率偏移至少约为8MHz。 从收发器接收一个或多个响应消息，其中所述一个或多个响应消息中的每一个是对所接收到的一个或多个探测消息中的一个的响应。 所述一个或多个响应消息用于确定所述一个或多个载波频率中的哪一个将用于向收发机传送信息。 在一些实施例中，每个探测消息包括训练序列，并且包括在一个或多个响应消息中的信息使得能够选择要使用的多个可能的调制方案中的一个。
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公开(公告)号：US07406296B2
公开(公告)日：2008-07-29
申请号：US10888011
申请日：2004-07-12
申请人： Jacobus C. Haartsen
发明人： Jacobus C. Haartsen
IPC分类号： H04B7/00
CPC分类号： H04W16/14 , H04W72/1215 , H04W84/12 , H04W84/18
摘要： A first radio transceiver is operated in close proximity to a second radio transceiver, even when the first and second radio transceivers operate in accordance with incompatible standards. Operation in this manner includes receiving a first signal that indicates whether the second radio transceiver is idle or busy and receiving a second signal that, when the second radio transceiver is idle, indicates when the second radio transceiver must have access to a second channel. Operation includes determining whether to enable the first radio transceiver to use a first channel based at least on the first signal.
摘要翻译： 即使当第一和第二无线电收发器根据不兼容的标准操作时，第一个无线电收发器操作在第二个无线电收发器附近。 以这种方式的操作包括接收指示第二无线电收发器是空闲还是忙的第一信号，并且接收第二信号，当第二无线电收发器空闲时，指示第二无线电收发器何时必须具有访问第二信道的信号。 操作包括确定是否使第一无线电收发器至少基于第一信号使用第一信道。
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