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1. 发明授权

US5802173A Radiotelephony system 失效
标题翻译：无线电话系统
公开(公告)号：US5802173A
公开(公告)日：1998-09-01
申请号：US820491
申请日：1992-01-14
申请人： Nicholas Francis Hamilton-Piercy , Donald Graham Monteith , Roger David Keay , George Maynard Hart , Meng Yee , Peter Oldfield , Philip Leighton , Edward O'Leary
发明人： Nicholas Francis Hamilton-Piercy , Donald Graham Monteith , Roger David Keay , George Maynard Hart , Meng Yee , Peter Oldfield , Philip Leighton , Edward O'Leary
IPC分类号： H04B7/26 , H04W88/08 , H04Q7/30
CPC分类号： H04W88/085 , H04B7/2609
摘要： A multichannel radiotelephony system provides two way cordless communications with a plurality of multichannel transceivers portable within a coverage area comprised by a plurality of cells, each associated with a base station and antennas, such as to permit channel frequency reuse in cells within the coverage area. For at least part of the coverage area, the locations of the antennas within the cells and the locations of the base stations are independently mapped, the antennas being associated with active antenna systems and the active antenna systems being connected to the base stations utilizing broadband transmission by means of a fixed bi-directional signal distribution network. The network is connected to the base stations and the antenna systems through suitable interfaces incorporating frequency translation so that available frequency bands in the signal distribution network which will normally be shared with other services, may be utilised. Plural base stations may be co-located. The radio link to the transceivers may be frequency or time division multiplexed, but communication over the network will normally be frequency multiplexed, using separate bands for transmission and reception.
摘要翻译：多通道无线电话系统提供与在由多个小区组成的覆盖区域内可移植的多个多信道收发机的双向无绳通信，每个小区与基站和天线相关联，例如允许在覆盖区域内的小区中进行信道频率重用。对于覆盖区域的至少一部分，单元内的天线的位置和基站的位置被独立地映射，天线与有源天线系统相关联，并且有源天线系统利用宽带传输连接到基站通过固定的双向信号分配网络。该网络通过合并了频率转换的合适的接口连接到基站和天线系统，从而可以利用通常与其他业务共享的信号分配网络中的可用频带。多个基站可能位于同一个位置。到收发器的无线电链路可以是频率或时分复用的，但是通过网络的通信通常将被频率复用，使用单独的频带进行发送和接收。

2. 发明授权

US06424834B1 Precision hard handoff method using pilot beacon distributors 有权
标题翻译：使用导频信标分配器的精密硬切换方法
公开(公告)号：US06424834B1
公开(公告)日：2002-07-23
申请号：US09365262
申请日：1999-07-31
申请人： Chu-Rui Chang , Meng Yee
发明人： Chu-Rui Chang , Meng Yee
IPC分类号： H04Q720
CPC分类号： H04W36/32 , H04W16/30
摘要： A method and system for providing a precision hard handoff between two networks is disclosed. The two networks include a first wireless communication system for serving a defined area, such as a campus, at a first frequency and a second wireless communication system adjacent to the first system and operating at a second frequency. A first pilot beacon distributor is positioned at a transition point of the campus for directionally transmitting a first pilot beacon signal into the campus. When a mobile unit operating on the second frequency crosses the transition point into the campus, it receives the first pilot beacon signal and it shifts operation to the first frequency.
摘要翻译：公开了一种用于在两个网络之间提供精确硬切换的方法和系统。两个网络包括第一无线通信系统，用于以与第一系统相邻的第一频率和第二频率的第二无线通信系统来服务诸如校园的限定区域，并且以第二频率操作。第一导频信标分配器位于校园的转换点，用于将第一导频信标信号定向发送到校园。当在第二频率上工作的移动单元穿过校园的转换点时，它接收第一导频信标信号，并将其移动到第一频率。

3. 发明授权

US06621811B1 Method and system for generating multiple pilot beacons of different frequencies from a single pilot beacon 有权
标题翻译：用于从单个导频信标产生不同频率的多个导频信标的方法和系统
公开(公告)号：US06621811B1
公开(公告)日：2003-09-16
申请号：US09364985
申请日：1999-07-31
申请人： Chu-Rui Chang , Meng Yee
发明人： Chu-Rui Chang , Meng Yee
IPC分类号： H04B7216
CPC分类号： H04W48/12 , H04W36/0083
摘要： A method and system for producing a plurality of pilot beacon signals with different carrier frequencies is disclosed. One original pilot beacon signal is first obtained, and a splitter is used to make copies of the pilot beacon signal. Each of the copies are fed into a mixer for generating a plurality of intermediate signals with different frequencies. A bandpass filter is subsequently used to select a final one among the intermediate signals. Thus, a set of pilot beacon signals with different frequencies are successfully obtained.
摘要翻译：公开了一种用于产生具有不同载波频率的多个导频信标信号的方法和系统。首先获得一个原始导频信标信号，并且使用分路器来制作导频信标信号的副本。将每个副本馈送到混合器中以产生具有不同频率的多个中间信号。随后使用带通滤波器来选择中间信号中的最后一个。因此，成功获得了一组具有不同频率的导频信标信号。

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