专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5544222A Cellular digtial packet data mobile data base station 失效
标题翻译：蜂窝数字分组数据移动数据基站
公开(公告)号：US5544222A
公开(公告)日：1996-08-06
申请号：US152005
申请日：1993-11-12
申请人： Mark T. Robinson , Steven H. Gardner , Matt Wong , Seton P. Kasmir , Kumar Balachandran , Sue Graham , Gail Schjelderup , Roy F. Quick, Jr.
发明人： Mark T. Robinson , Steven H. Gardner , Matt Wong , Seton P. Kasmir , Kumar Balachandran , Sue Graham , Gail Schjelderup , Roy F. Quick, Jr.
IPC分类号： H04W48/08 , H04W72/02 , H04W88/10 , H04Q7/30 , H04Q7/20
CPC分类号： H04W88/10 , H04W48/08 , H04W72/02
摘要： A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.
摘要翻译：蜂窝数字分组数据（CDPD）系统包括配置成与高级移动电话系统（AMPS）轻松接口的移动数据基站（MDBS）。 MDBS的元素安排在模块上，MDBS的功能在模块之间划分，以促进MDBS的灵活性，紧凑性和快速扩展。为了进一步促进紧凑性，MDBS包括使用单个芯片进行Δ-Σ调制的收发机/调制解调器板。为了保持CDPD传输的完整性，基于避免AMPS信道使用，使用信道跳频方案。一种独特的协议用于封装控制/查询/响应数据，以便在整个CDPD系统中进行传输。该协议还有助于在整个系统中容易地控制每个MDBS。

2. 发明授权

US6122527A Cellular digital packet data mobile data base station 失效
标题翻译：蜂窝数字分组数据移动数据基站
公开(公告)号：US6122527A
公开(公告)日：2000-09-19
申请号：US587685
申请日：1996-01-17
申请人： Mark T. Robinson , Steven H. Gardner , Matt Wong , Seton P. Kasmir , Kumar Balachandran , Sue Graham , Gail Schjelderup , Roy Franklin Quick, Jr.
发明人： Mark T. Robinson , Steven H. Gardner , Matt Wong , Seton P. Kasmir , Kumar Balachandran , Sue Graham , Gail Schjelderup , Roy Franklin Quick, Jr.
IPC分类号： H04W48/08 , H04W72/02 , H04W88/10 , H04Q7/30
CPC分类号： H04W88/10 , H04W48/08 , H04W72/02
摘要： A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.
摘要翻译：蜂窝数字分组数据（CDPD）系统包括配置成与高级移动电话系统（AMPS）轻松接口的移动数据基站（MDBS）。 MDBS的元素安排在模块上，MDBS的功能在模块之间划分，以促进MDBS的灵活性，紧凑性和快速扩展。为了进一步促进紧凑性，MDBS包括使用单个芯片进行Δ-Σ调制的收发机/调制解调器板。为了保持CDPD传输的完整性，基于避免AMPS信道使用，使用信道跳频方案。一种独特的协议用于封装控制/查询/响应数据，以便在整个CDPD系统中进行传输。该协议还有助于在整个系统中容易地控制每个MDBS。

3. 发明授权

US06731752B1 Method and circuit for echo-cancellation in two-way communications 有权
标题翻译：双向通信中回波消除的方法和电路
公开(公告)号：US06731752B1
公开(公告)日：2004-05-04
申请号：US09708403
申请日：2000-11-08
申请人： Naom Chaplik , Chanchai Poonpol , Mark T. Robinson
发明人： Naom Chaplik , Chanchai Poonpol , Mark T. Robinson
IPC分类号： H04M100
CPC分类号： H04B3/23 , H04M1/74
摘要： A hybrid circuit models a plurality of attributes of a communication system including a subscriber line coupled to a line interface circuit. The plurality of attributes includes subscriber line impedance, and impedance of a coupling transformer. The attributes are based on other factors, such as whether or not bridge taps exist at or near the line interface circuit on the subscriber line. The plurality of attributes are modeled by a specific arrangement of resistive and capacitive elements to substantially duplicate the collective transformative effects of the attributes on a transmission signal being sent out on the subscriber line. The transmission signal is transformed and provided to an output, where it is subtracted from a composite signal representing a combination of the actual transformed transmission signal and a receive signal. The subtraction yields an isolated receive signal, which is later processed to recover the full receive signal.
摘要翻译：混合电路对包括耦合到线路接口电路的用户线的通信系统的多个属性进行建模。多个属性包括用户线阻抗和耦合变压器的阻抗。属性基于其他因素，例如在用户线上的线路接口电路上或附近是否存在桥接抽头。多个属性通过电阻和电容元件的特定布置来建模，以基本上复制属性对在用户线上发送的传输信号的集体变换效应。传输信号被变换并提供给输出，其中从表示实际变换的传输信号和接收信号的组合的复合信号中减去传输信号。减法产生一个隔离的接收信号，后来被处理以恢复完整的接收信号。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式