-
公开(公告)号：US20050243902A1
公开(公告)日：2005-11-03
申请号：US10520721
申请日：2003-06-25
CPC分类号： H03D7/163
摘要： The invention relates to VHF adapters for cable networks of the ODU type. It consists in using two conversion chains, up and down, in which a very stable signal reference oscillator drives means of generating the VHF and IF local frequencies common to these two conversion chains. A very selective surface wave filter makes it possible to rject the frequency of the local oscillator at the level of the first intermediate frequency. It makes it possible to obtain a DOCSIS compatible millimeter MWS ODU whose frequency stability and spectral purity satisfy the constraints of the cable standard without undertaking spectral inversion of the signals transmitted and received.
摘要翻译： 本发明涉及用于ODU类型的有线网络的VHF适配器。 它包括使用上下两个转换链，其中非常稳定的信号参考振荡器驱动产生这两个转换链共同的VHF和IF本地频率的手段。 非常选择性的表面波滤波器使得可以在本机振荡器的频率处于第一中频的电平。 它可以获得DOCSIS兼容的毫米波MWS ODU，其频率稳定性和光谱纯度满足电缆标准的约束，而不会对发送和接收的信号进行频谱反演。
-
2.发明授权Repeater for radio frequency signals, and for digital television signals in particular 失效中继器用于射频信号，特别是数字电视信号公开(公告)号：US08565671B2
公开(公告)日：2013-10-22
申请号：US12452339
申请日：2008-06-19
IPC分类号： H04B7/14
CPC分类号： H04B7/15578
摘要： This invention concerns a repeater for radio frequency signals having a channel filter and an active filter connected to the channel filter output. The active filter covers the channels adjacent to the channel filter and includes an amplifier and; two bandpass filters in parallel connected as a negative feedback loop around the amplifier. The first bandpass filter covers the lower adjacent channels and the second bandpass filter covers the higher adjacent channels. The invention notably applies to the development of domestic repeaters for mobile terminals meeting the DVB-H digital television standard.
摘要翻译： 本发明涉及一种用于具有通道滤波器和连接到信道滤波器输出的有源滤波器的射频信号的中继器。 有源滤波器覆盖与信道滤波器相邻的信道，并且包括放大器; 两个带通滤波器并联连接在放大器周围的负反馈环路。 第一带通滤波器覆盖下相邻信道，第二带通滤波器覆盖较高相邻信道。 本发明特别适用于满足DVB-H数字电视标准的移动终端的国内中继器的开发。
-
3.发明授权Switch and switching device with selective isolation for multimedia terminals 有权用于多媒体终端的选择性隔离开关和开关装置公开(公告)号：US07853222B2
公开(公告)日：2010-12-14
申请号：US11810056
申请日：2007-06-04
IPC分类号： H04B7/02
CPC分类号： H04B1/48
摘要： The invention relates to a switch with selective isolation and also to a switching device with selective isolation for multimedia terminals. The switch formed by 2 transistors (T1, T2) is feedback controlled by a feedback control signal V tune at a pre-defined frequency thus guaranteeing the selective isolation at this frequency. The switching device for switching the transmission/receiver channels of a multimedia terminal is formed by selective isolation switches that can be integrated using MMIC technology.
摘要翻译： 本发明涉及具有选择性隔离的开关，并且涉及具有用于多媒体终端的选择性隔离的开关装置。 由2个晶体管（T1，T2）形成的开关由预定频率的反馈控制信号V调制反馈控制，从而保证在该频率下的选择性隔离。 用于切换多媒体终端的发送/接收信道的交换设备由可以使用MMIC技术集成的选择性隔离开关形成。
-
4.发明申请Device and method for improving the carrier-to-noise ratio for a receiver with diversity 有权用于提高具有多样性的接收机的载波噪声比的装置和方法公开(公告)号：US20070165758A1
公开(公告)日：2007-07-19
申请号：US11651769
申请日：2007-01-10
IPC分类号： H04L1/02
CPC分类号： H04B1/126 , H04B7/0857
摘要： The method of improving the carrier-to-noise ratio for a receiver with diversity, and the associated device, consists, after extracting, by phase shifting, the noise component of the signals to be demodulated, in optimizing the cancellation of the useful component via a feedback loop acting on the phase shifter and in summing the noise component in phase and in phase opposition with these signals to improve the carrier-to-noise ratio.
摘要翻译： 提高具有分集能力的接收机的载噪比的方法以及相关设备在通过相移提取要解调的信号的噪声分量之后，在优化有用分量的消除通过 一个作用在移相器上的反馈回路，并且与这些信号相位和相位相反的噪声分量相加，以提高载波噪声比。
-
公开(公告)号：US20060087368A1
公开(公告)日：2006-04-27
申请号：US10540824
申请日：2003-12-17
IPC分类号： H03K5/00
CPC分类号： H03J7/04
摘要： The invention proposes a filtering device having a frequency response which is symmetrical, using asymmetrical filters coupled by transposition means. The advantageous characteristics of the asymmetrical filters are retained and the faults associated with the asymmetry are eliminated. The asymmetrical filters are, for example, quartz filters. The invention also proposes an external transmission and reception unit, using the filtering device with the application of the filtering method.
摘要翻译： 本发明提出一种具有对称频率响应的滤波装置，使用通过转置装置耦合的非对称滤波器。 保留不对称滤波器的有利特性，消除与不对称相关的故障。 不对称滤波器例如是石英滤波器。 本发明还提出了一种使用过滤装置应用过滤方法的外部发送和接收单元。
-
公开(公告)号：US09136955B2
公开(公告)日：2015-09-15
申请号：US13381229
申请日：2009-06-30
CPC分类号： H04H20/08 , H04B7/15542 , H04H20/63
摘要： The invention relates to a method of resending at least one digital signal, comprising a step of reception by cable of the signal comprising signaling information, a step of resending of this signal at a resend frequency by an antenna, and also comprising a step of selecting the resend frequency as a function of the signaling information; a step of transposing the signal into the selected frequency of the resend signal and a step of monitoring and adjusting the frequency of the resend signal as a function of the selected frequency of the resend signal.
摘要翻译： 本发明涉及一种重新发送至少一个数字信号的方法，包括通过电缆接收包括信令信息的信号的步骤，以天线以再发送频率重新发送该信号的步骤，还包括选择 重发频率作为信令信息的函数; 将信号转置到重发信号的选定频率的步骤，以及根据重发信号的选定频率来监测和调整重发信号的频率的步骤。
-
公开(公告)号：US20130249770A1
公开(公告)日：2013-09-26
申请号：US13991191
申请日：2011-12-07
IPC分类号： H01Q1/50
CPC分类号： H01Q1/50 , H04B7/0408 , H04B7/0822
摘要： The invention relates to a device for receiving signals in a MIMO system comprising: m signal receiver channels, where m is greater than 1; an antenna system constituted either by n directive antennae n>m, each antenna being able to receive signals in one of its own angular sectors, the angular sectors of the n antennae essentially not overlapping each other and together thrilling a total angular sector of 360 degrees, or a multi-sector antenna with n angular sectors n>m the n angular sectors essentially not overlapping each other and having a distinct access; and switching means to associate with each signal receiver channel an antenna from among the n antennae according to a switching schema selected by control means, the switching schema being selected from a plurality of switching schemas of a switching matrix according to a criterion representing the quality of the reception of the signals by said signal receiver channels.
摘要翻译： 本发明涉及一种用于在MIMO系统中接收信号的装置，包括：m个信号接收机信道，其中m大于1; 由n个定向天线n> m构成的天线系统，每个天线能够在其自己的角扇区之一中接收信号，所述n个天线的角扇区基本上彼此不重叠，并且一起激发360度的总角度扇区 或者具有n个角扇区的n个角扇区的多扇区天线，其基本上不重叠并具有不同的接入; 以及切换装置，用于根据由控制装置选择的切换模式从n个天线中的每个信号接收机信道关联天线，所述切换模式根据表示质量的标准从交换矩阵的多个切换模式中选择 由所述信号接收机通道接收信号。
-
公开(公告)号：US07436250B2
公开(公告)日：2008-10-14
申请号：US10540824
申请日：2003-12-17
IPC分类号： H03K5/00
CPC分类号： H03J7/04
摘要： The invention proposes a filtering device having a frequency response which is symmetrical, using asymmetrical filters coupled by transposition means. The advantageous characteristics of the asymmetrical filters are retained and the faults associated with the asymmetry are eliminated. The asymmetrical filters are, for example, quartz filters. The invention also proposes an external transmission and reception unit, using the filtering device with the application of the filtering method.
摘要翻译： 本发明提出一种具有对称频率响应的滤波装置，使用通过转置装置耦合的非对称滤波器。 保留不对称滤波器的有利特性，消除与不对称相关的故障。 不对称滤波器例如是石英滤波器。 本发明还提出了一种使用过滤装置应用过滤方法的外部发送和接收单元。
-
公开(公告)号：US06657505B2
公开(公告)日：2003-12-02
申请号：US10168203
申请日：2002-06-19
IPC分类号： H03B1110
CPC分类号： H03C3/28 , H03B5/1864 , H03C7/02
摘要： The invention relates to a dielectric resonator oscillator, comprising a dielectric resonator contained in a resonant cavity in order to generate a signal oscillating at a predetermined central frequency, the dimensions of the resonator and the limiting conditions in the cavity being capable of determining the resonant frequency of the resonator. It comprises means sensitive to acoustic pressure waves capable of modifying the distribution of the electromagnetic fields in the cavity as a function of said acoustic pressure waves. The invention also relates to a voice control device equipped with an oscillator according to the invention. Particular application to remote voice control devices for controlling domestic equipment.
摘要翻译： 本发明涉及一种介质谐振器振荡器，其包括谐振腔中包含的介质谐振器，以便产生以预定中心频率振荡的信号，谐振器的尺寸和腔中的限制条件能够确定谐振频率 的谐振器。 它包括对声压波敏感的装置，其能够根据所述声压波改变腔中电磁场的分布。 本发明还涉及一种配备有根据本发明的振荡器的语音控制装置。 用于遥控家用设备的远程语音控制设备的特殊应用。
-
公开(公告)号：US09496604B2
公开(公告)日：2016-11-15
申请号：US13991191
申请日：2011-12-07
CPC分类号： H01Q1/50 , H04B7/0408 , H04B7/0822
摘要： The invention relates to a device for receiving signals in a MIMO system comprising: m signal receiver channels, where m is greater than 1; an antenna system constituted either by n directive antennae n>m, each antenna being able to receive signals in one of its own angular sectors, the angular sectors of the n antennae essentially not overlapping each other and together thrilling a total angular sector of 360 degrees, or a multi-sector antenna with n angular sectors n>m the n angular sectors essentially not overlapping each other and having a distinct access; and switching means to associate with each signal receiver channel an antenna from among the n antennae according to a switching schema selected by control means, the switching schema being selected from a plurality of switching schemas of a switching matrix according to a criterion representing the quality of the reception of the signals by said signal receiver channels.
-
-
-
-
-
-
-
-
-
搜索结果
80 条记录 (耗时 0.026 秒)