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公开(公告)号：US5574966A
公开(公告)日：1996-11-12
申请号：US367402
申请日：1994-12-30
IPC分类号： H04N5/38 , H04H20/38 , H04H20/42 , H04H20/46 , H04H20/72 , H04J1/08 , H04N21/2368 , H04N21/434 , H04H1/02
CPC分类号： H04H20/46 , H04N21/6112 , H04N21/64784 , H04H20/38 , H04H20/42 , H04H20/72 , H04N2007/145
摘要： A wireless base station architecture that is particularly well-suited for providing audio, video and data services. An exemplary embodiment preferably transmits to all of an area those "common services" (e.g., broadcast television) that are intended to be received by multiple recipients throughout the area, but, in contrast, transmits only into a sector those recipient-specific services (e.g., point-to-point voice services, interactive video services) that are intended for less than all of the recipients in the area. In an exemplary embodiment, a demultiplexor directs both broadcast video and recipient-specific or "sectorized" video signals to a video processor, which prepares them for transmission. The demultiplexor also directs sectorized audio signals to an audio processor/RF combiner, which prepares them for transmission. The video processor preferably directs the broadcast video signals to an antenna, which radiates the signal throughout the area, but directs the sectorized video signals to the audio processor/RF combiner. The audio processor/RF combiner combines the sectorized audio signals and the sectorized video signals before transmitting them to an antenna, which radiates the combined signal throughout the sector.
摘要翻译： 一种特别适合提供音频，视频和数据服务的无线基站架构。 一个示例性实施例优选地向所有区域传输旨在由整个区域中的多个接收者接收的那些“共同服务”（例如，广播电视），但是相反，仅向扇区传送那些接收者特定服务（ 例如，点对点语音服务，交互式视频服务），其用于少于该区域中的所有接收者。 在示例性实施例中，解复用器将广播视频和接收者特定或“扇区化”视频信号引导到视频处理器，视频处理器准备它们进行传输。 解复用器还将扇区化音频信号引导到音频处理器/ RF组合器，其准备它们进行传输。 视频处理器优选地将广播视频信号引导到天线，其在整个区域中辐射信号，但是将扇区化的视频信号引导到音频处理器/ RF组合器。 音频处理器/ RF组合器在将它们发送到天线之前组合扇区化音频信号和扇区化视频信号，其在整个扇区辐射组合信号。
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52.发明授权
公开(公告)号：US5894478A
公开(公告)日：1999-04-13
申请号：US690269
申请日：1996-07-24
申请人： Farhad Barzegar , Chi-Hwey Chang , Albert Chow , Gregory M. Durant , Danny K. Hsu , Xiaojian Huang , Jesse Eugene Russell , Robert Edward Schroeder
发明人： Farhad Barzegar , Chi-Hwey Chang , Albert Chow , Gregory M. Durant , Danny K. Hsu , Xiaojian Huang , Jesse Eugene Russell , Robert Edward Schroeder
CPC分类号： H04W88/005 , H04L69/18 , H04W88/16
摘要： The present invention encompasses an apparatus and method for supporting multiple wireless data communication networks between a wireless communications device and a fixed communications device or another wireless communications device. Two network elements compose the physical apparatus, a protocol converter and a router. Upon receiving packet data from a fixed communications device, a router will locate a destination wireless communications device. The router will then convert the packet data to a format usable by the wireless data network that the wireless communications device is currently using for wireless access. After conversion, the router will perform actual transmission of the packet data to the correct destination wireless network. Once the converted packet data is received by the wireless network base station, it will be transmitted via RF to the destination wireless communications device. The router will also perform reverse functions of receiving packet data from a wireless communications device across wireless data network and then perform necessary conversion to a format usable by fixed communications device. The router will then perform actual transmission of the converted packet data to the fixed communications device.
摘要翻译： 本发明包括用于在无线通信设备和固定通信设备或另一无线通信设备之间支持多个无线数据通信网络的设备和方法。 两个网络元件组成物理设备，协议转换器和路由器。 在从固定通信设备接收分组数据时，路由器将定位目的地无线通信设备。 然后，路由器将分组数据转换成无线数据网络可用于无线通信设备当前用于无线接入的格式。 转换后，路由器将执行分组数据的实际传输到正确的目标无线网络。 一旦转换的分组数据被无线网络基站接收，它将通过RF发送到目标无线通信设备。 路由器还将执行通过无线数据网络从无线通信设备接收分组数据的反向功能，然后执行必要的转换为固定通信设备可使用的格式。 路由器然后将转换的分组数据实际传输到固定通信设备。
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53.发明授权Access director interface for narrowband/broadband information distribution network 失效窄带/宽带信息分发网络的接入总线接口
公开(公告)号：US5642348A
公开(公告)日：1997-06-24
申请号：US367419
申请日：1994-12-30
CPC分类号： H04W88/08 , H04Q11/0428 , H04Q2213/13098 , H04Q2213/13191 , H04Q2213/13196 , H04Q2213/13204 , H04Q2213/13209 , H04Q2213/13298 , H04Q2213/1332 , H04Q2213/13332 , H04Q2213/13376 , H04W84/14
摘要： An access director provides a gateway for customer premise based equipment (both wired and wireless) and a wireless port facility to a narrowband/broadband information distribution network. It provides a portable narrowband duplex synchronous and isochronous telephony service and concurrent broad fixed location dodwn link from network to customer isochronous service. The down link broadband service may be combined with narrowband up link service to provide non-symmetric duplex operation or services such as interactive video.
摘要翻译： 访问总监为基于客户端的设备（有线和无线）和无线端口设施提供到窄带/宽带信息分发网络的网关。 它提供便携式窄带双工同步和同步电话服务以及从网络到客户同步业务的同时广泛的固定位置躲避链路。 下行链路宽带服务可以与窄带上行链路服务组合以提供非对称双工操作或诸如交互式视频的服务。
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54.发明授权Plug-in wireless module for operation with portable wireless enabled host equipment 失效插入式无线模块，用于携带无线使能的主机设备
公开(公告)号：US5559501A
公开(公告)日：1996-09-24
申请号：US289739
申请日：1994-08-12
申请人： Farhad Barzegar , Peter B. Guerlain
发明人： Farhad Barzegar , Peter B. Guerlain
CPC分类号： G06F1/1632 , G06F1/1616 , H04B1/38
摘要： A wireless-enabled host electronic equipment includes a built-in antenna and special plug-in receptacles enabling a plug-in wireless communicator to interact with the host and to connect to the built-in antenna for wireless transmission and reception. In accord with the invention the plug-in arrangement is constructed to conform to a standardized plug-in arrangement, such as a PCMCIA standard and to provide additional plug-in capability in addition to the standardized receptacle which does not conflict with the standardized receptacle. The plug-in arrangement is configured to permit use of a plug-in for other purposes in the same standard receptacle.
摘要翻译： 支持无线的主机电子设备包括内置天线和特殊插件插座，可插拔式无线通信器与主机进行交互，并连接到内置天线进行无线传输和接收。 根据本发明，插件装置被构造成符合诸如PCMCIA标准的标准化插件布置，并且除了与标准化插座不冲突的标准插座之外还提供额外的插件功能。 插入装置被配置为允许在同一标准插座中使用插件用于其他目的。
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公开(公告)号：US5257397A
公开(公告)日：1993-10-26
申请号：US566733
申请日：1990-08-13
CPC分类号： H04W88/02
摘要： A mobile data telephone capable of transmitting and/or receiving voice and/or data signals over cellular communication channels or other air interfaces comprises a radio transceiver and a data modem in the same physical package. The transceiver and the modem have their respective controllers coupled so that they are effectively linked to achieve control of data transfer therebetween. In response to communication channel conditions in the air interface, the data flow between the modem and an audio processor of the transceiver can be selectively altered yielding high performance and high quality data transfer rates in the presence of severe channel impairments.
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公开(公告)号：US4748351A
公开(公告)日：1988-05-31
申请号：US900578
申请日：1986-08-26
申请人： Farhad Barzegar
发明人： Farhad Barzegar
IPC分类号： H03K17/687 , H03K17/16 , H03K17/691 , H03K17/74 , H03K3/33
CPC分类号： H03K17/691
摘要： A MOSFET gate driver circuit reduces the noise susceptibility of a MOSFET switch by utilizing dual drive paths to apply turn-on and turn-off bias signals to the gate of the MOSFET. Drive pulses are coupled to the MOSFET switch via a pulse transformer which has two serially connected secondary windings. Turn-on pulses are coupled by a diode from the first secondary to the MOSFET gate. Turn-off pulses are coupled via the second secondary to a control MOSFET which is turned on by a turn-off pulse and remains on in order to keep the gate of the MOSFET switch to a hold off voltage.
摘要翻译： MOSFET栅极驱动器电路通过利用双驱动路径将MOSFET开关的噪声敏感性降低到MOSFET的栅极，从而将导通和关断偏置信号施加于MOSFET的栅极。 驱动脉冲通过具有两个串联连接的次级绕组的脉冲变压器耦合到MOSFET开关。 导通脉冲由二极管从第一次级耦合到MOSFET栅极。 关断脉冲经由第二次级耦合到控制MOSFET，该控制MOSFET由关断脉冲导通，并保持导通，以便将MOSFET开关的栅极保持为截止电压。
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57.发明授权Dual image-reject mixer receiver for multiple channel reception and processing 失效双图像拒绝混频器接收机，用于多频道接收和处理公开(公告)号：US06397051B1
公开(公告)日：2002-05-28
申请号：US09217924
申请日：1998-12-21
IPC分类号： H04B110
摘要： A system and method in which a dual image-reject mixer arrangement receives an RF signal having at least one channel. The dual image-reject mixer arrangement generates first and second signals corresponding to each channel of the RF signal. Each first and second signal includes a desired signal, an image frequency signal and an intermodulation signal. A feed-forward arrangement receives the first and second signals corresponding to each channel and outputs a third signal that is formed by constructively combining the desired signals corresponding to each channel and substantially cancelling the intermodulation signals corresponding to each channel. An in-phase and quadrature hybrid network receives the third signal and outputs an in-phase baseband signal and a quadrature baseband signal corresponding to each channel of the RF signal. A controller is coupled to the dual image-reject mixer arrangement and monitors the first and second signals, and controls an amplitude and a phase of the image frequency signals so that the image frequency signals are collectively minimized based on the monitored first and second signals. The controller is also coupled to the feed-forward arrangement and monitors the third signal. Based on the monitored third signals, the controller controls the amplitude and the phase of the intermodulation signals so that the intermodulation signals are collectively optimally cancelled.
摘要翻译： 一种双图像拒绝混频器装置接收具有至少一个声道的RF信号的系统和方法。 双图像拒绝混频器装置产生对应于RF信号的每个信道的第一和第二信号。 每个第一和第二信号包括期望信号，图像频率信号和互调信号。 前馈装置接收对应于每个信道的第一和第二信号，并且输出通过构建性组合对应于每个信道的期望信号并且基本上消除对应于每个信道的互调信号而形成的第三信号。 同相和正交混合网络接收第三信号并输出与RF信号的每个信道相对应的同相基带信号和正交基带信号。 控制器耦合到双图像拒绝混频器装置并监视第一和第二信号，并且控制图像频率信号的幅度和相位，使得基于所监视的第一和第二信号，将图像频率信号集中地最小化。 控制器还耦合到前馈装置并监视第三信号。 基于所监测的第三信号，控制器控制互调信号的幅度和相位，使得互调信号被共同地最佳地消除。
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