-
公开(公告)号：US06842498B2
公开(公告)日：2005-01-11
申请号：US10294227
申请日：2002-11-14
申请人： Johann Heinzl , Gary Jacobsen , Jining Yang , Kishan Shenoi
发明人： Johann Heinzl , Gary Jacobsen , Jining Yang , Kishan Shenoi
CPC分类号： G01S19/37 , G01S19/21 , H03J1/0008 , H03J3/08 , H04B1/7102
摘要： Systems and methods are described for a GPS receiver capable of functioning in the presence of interference. A method includes detecting an interfering signal including: tuning a band pass filter over a frequency range; and at each of a plurality of incremental frequencies: computing a set of band pass filter coefficients; sending the set of band pass filter coefficients to a digital filter; repeatedly transforming an analog-to-digital converter output having a quantization level in excess of 2 bits into a band pass filter output with the digital filter to obtain a plurality of samples; computing an average of the plurality of samples; and comparing the average to a threshold to detect peaks that exceed a threshold. An apparatus includes: an analog radio frequency circuit; an analog-to-digital converter coupled to the analog radio frequency circuit, the analog-to-digital converter providing a quantization level in excess of 2 bits; a digital filter coupled to the analog-to-digital converter; and a digital circuit coupled to the digital filter.
摘要翻译： 为能够在存在干扰的情况下起作用的GPS接收机描述系统和方法。 一种方法包括检测干扰信号，包括：在频率范围上调谐带通滤波器; 并且在多个增量频率中的每一个处：计算一组带通滤波器系数; 将一组带通滤波器系数发送到数字滤波器; 将具有超过2位的量化级的模数转换器输出反复变换为与数字滤波器一起输出的带通滤波器，以获得多个采样; 计算所述多个样本的平均值; 并将平均值与阈值进行比较以检测超过阈值的峰值。 一种装置包括：模拟射频电路; 耦合到所述模拟射频电路的模数转换器，所述模数转换器提供超过2位的量化级; 耦合到所述模数转换器的数字滤波器; 以及耦合到数字滤波器的数字电路。
-
公开(公告)号：US5749048A
公开(公告)日：1998-05-05
申请号：US886665
申请日：1997-07-02
申请人： Hiroshi Masuda
发明人： Hiroshi Masuda
CPC分类号： H03J1/0091 , H03J1/0066 , H04H60/44 , H03J3/08 , H04H2201/13 , H04H60/27
摘要： A receiver for receiving a broadcast in which data indicating a broadcast station name has been multiplexed to a main signal includes: a receiving circuit constructed in a frequency synthesizer mode; a memory in which a group of frequency data for selecting the broadcast in the receiving circuit, and data on the broadcast station name is registered; a circuit for taking out the data from a signal received by the receiving circuit; a scanner for allowing the receiving circuit to scan the broadcasting zone for the broadcast; and a detector for detecting the received broadcast at the time of the scanning, when the detector has detected the received broadcast during the scanning, the group of the frequency data which has been registered before the start of the scanning, and the data on the broadcast station name is shifted to the data area in the memory, and one group of the frequency data indicating the frequency thus detected, and the data on the broadcast station name for the received broadcast is registered in the data area in the memory which has become empty by the shift.
摘要翻译： 一种用于接收广播的接收机，其中指示广播台名称的数据已被复用到主信号中，包括：以频率合成器模式构成的接收电路; 记录在接收电路中选择广播的一组频率数据和广播电台名称的数据的存储器; 用于从接收电路接收的信号中取出数据的电路; 用于允许接收电路扫描广播区域以用于广播的扫描仪; 以及检测器，用于在扫描时检测接收到的广播，当检测器在扫描期间检测到接收到的广播时，已经在扫描开始之前登记的频率数据组和广播上的数据 站名被移位到存储器中的数据区域，并且一组频率数据指示如此检测的频率，并且用于所接收的广播的广播站名称上的数据被登记在已经变为空的存储器中的数据区域中 通过转移。
-
公开(公告)号：US4749974A
公开(公告)日：1988-06-07
申请号：US5930
申请日：1987-01-22
申请人： Masaki Yamamoto , Mineo Koyama
发明人： Masaki Yamamoto , Mineo Koyama
摘要： A double-tuned circuit is provided of the type comprising a primary tuning circuit including first and second resonance coils connected in series and a first switching diode interposed between the connection point of the first and second resonance coils and the ground, and a secondary tuning circuit including third and fourth resonance coils connected in series and inductive-coupled with the first and second resonance coils, respectively, and a second switching diode interposed between the connection point of the third and fourth resonance coils and the ground, wherein band switching is preformed by turning on/off both the first and second switching diodes, which is characterized in that a bias voltage for turning on the first and second switching diodes is supplied to one of the switching diodes and through a conductive wire inductive-coupled with a sintered magnetic material to the other of the switching diodes, whereby an enlargement of the bandwidth and degradation of the flatness of the passband characteristic can be suppressed even with an increase of a receive channel frequency.
摘要翻译： 提供了一种双调谐电路，其包括一个初级调谐电路，该初级调谐电路包括串联连接的第一和第二谐振线圈以及插在第一和第二谐振线圈的连接点与地之间的第一开关二极管，以及二次调谐电路 包括分别串联连接并与第一和第二谐振线圈电感耦合的第三和第四谐振线圈和插在第三和第四谐振线圈的连接点与地之间的第二开关二极管，其中频带切换由 打开/关闭第一和第二开关二极管，其特征在于用于接通第一和第二开关二极管的偏置电压被提供给开关二极管之一并且通过与烧结磁性材料感应耦合的导线 到另一个开关二极管，由此带宽的扩大和平坦度的劣化 即使随着接收信道频率的增加，也可以抑制通带特性。
-
公开(公告)号：US4352208A
公开(公告)日：1982-09-28
申请号：US256760
申请日：1981-04-23
申请人： Daniel R. Schroeder
发明人： Daniel R. Schroeder
CPC分类号： H03J1/005
摘要： A microprocessor controlled radio receiver system for switching bandwidths of an intermediate frequency stage from a normally scanning mode using a relatively narrow bandwidth to a second mode using a relatively wide bandwidth automatically when there are no interfering signals from adjacent channels of a channel or station selected for receiving. Upon selection of a channel for listening the microprocessor controlled synthesizer causes the synthesizer to scan up one adjacent channel and down one adjacent channel to determine if there is an interfering signal therefrom and then returns to the selected channel. In the event of no interfering signal from an adjacent channel, switching is effected in the IF stage from a narrow bandwidth to a wide bandwidth to improve the quality of reception. If there is an adjacent channel signal detected of sufficient IF energy next to the selected channel, then the narrow bandwidth mode used during the scan will be maintained.
摘要翻译： 一种微处理器控制的无线电接收机系统，用于当没有干扰信号从相对较窄的带宽到相对较窄的带宽的第二模式时，使用相对宽的带宽自动从正常扫描模式切换中频段的带宽， 接收。 在选择用于收听微处理器控制的合成器的频道时，合成器将扫描一个相邻信道并向下扫描一个相邻信道，以确定是否存在干扰信号，然后返回到所选频道。 在没有来自相邻信道的干扰信号的情况下，在IF级从窄带宽到宽带宽进行切换，以提高接收质量。 如果存在检测到所选通道旁边的足够的IF能量的相邻信道信号，则将维持在扫描期间使用的窄带宽模式。
-
25.发明授权Plural band channel selector having selector knobs controlling respective ones of a plurality of tuners 失效具有选择器KNOBS的多通道选通器控制多个调谐器的相关性
公开(公告)号：US3777288A
公开(公告)日：1973-12-04
申请号：US3777288D
申请日：1972-05-25
摘要： A channel selector is provided which has means for detecting the channel selector knobs of a VHF and UHF tuner touched by a viewer so that in response to the signal from the detecting means, the VHF or UHF tuner may be automatically energized whereas the other tuner is deactivated. Thus, only the desired tuner is energized in channel selection, and the channel selection may be made in one step.
摘要翻译： 提供了一种通道选择器，其具有用于检测由观看者触摸的VHF和UHF调谐器的声道选择旋钮的装置，使得响应于来自检测装置的信号，VHF或UHF调谐器可以自动通电，而另一个调谐器 停用 因此，只有所需的调谐器在频道选择中被激励，并且频道选择可以在一个步骤中进行。
-
公开(公告)号：US2267173A
公开(公告)日：1941-12-23
申请号：US31967340
申请日：1940-02-19
申请人： JOHNSON LAB INC
发明人： SCHAPER WILLIAM A
-
-
-
公开(公告)号：US11671069B2
公开(公告)日：2023-06-06
申请号：US16685134
申请日：2019-11-15
申请人： Ethertronics, Inc.
发明人： Olivier Pajona , Laurent Desclos
摘要： The disclosure concerns a signal aggregator component designed to couple with an antenna element to form an antenna system, wherein the resulting antenna system can achieve one-hundred percent or greater efficiency in receiving mode. In addition, the antenna system can achieve specific polarization and gain in different sectors of the antenna radiation pattern. The signal aggregator functions to dynamically enable or disable any number of its RF ports to select the RF input signal to aggregate.
-
公开(公告)号：US20200262472A1
公开(公告)日：2020-08-20
申请号：US16279636
申请日：2019-02-19
摘要： A steering system includes an electric motor drivably coupled to a steering column, and a computer communicatively coupled to the electric motor. The computer is programmed to isolate a nibble signal in data representing a torque of the steering column, and instruct the electric motor to output a motor torque based on the nibble signal shifted by a phase shift, the phase shift based on a vehicle-wheel frequency.
-
-
-
-
-
-
-
-
-
搜索结果
96 条记录 (耗时 0.011 秒)
