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    • 3. 发明授权
    • System and method for distributing RF signals over power lines within a
substantially closed environment
    • 在基本封闭的环境中通过电力线分配RF信号的系统和方法
    • US6151480A
    • 2000-11-21
    • US884533
    • 1997-06-27
    • Larry G. FischerDavid S. Russell
    • Larry G. FischerDavid S. Russell
    • H04B3/54H04B3/56H04H1/14H04H1/00H04H7/10
    • H04B3/54H04B3/56H04B2203/5437H04B2203/5441
    • A system for distributing RF signals to users over power lines in a structure. The system includes a head end unit that receives RF signals in a first frequency range to be distributed to users in the structure. The head end unit is coupled to the power lines of the structure. RF signals are transmitted over the power lines in a second frequency range. The head end unit includes a frequency converter that translates RF signals between the first frequency range and the second frequency range. The system also includes a number of remote units. The remote units are coupled to the power lines and disposed throughout the structure to provide RF coverage within the structure. The remote units include frequency converters that convert signals between the first and second frequency ranges. Further, an antenna is coupled to each remote unit to transmit signals to and receive signals from the users in the first frequency range.
    • 一种用于在结构中的电力线上向用户分发RF信号的系统。 该系统包括头端单元,其接收在第一频率范围内的RF信号,以分配给该结构中的用户。 头端单元耦合到结构的电源线。 RF信号在第二频率范围内通过电力线传输。 头端单元包括变频器,其在第一频率范围和第二频率范围之间转换RF信号。 该系统还包括多个远程单元。 远程单元耦合到电力线并且布置在整个结构中以在结构内提供RF覆盖。 远程单元包括在第一和第二频率范围之间转换信号的变频器。 此外,天线耦合到每个远程单元以在第一频率范围内向用户发送信号并从其接收信号。
    • 4. 发明授权
    • Cellular communications system with centralized base stations and
distributed antenna units
    • 具有集中基站和分布式天线单元的蜂窝通信系统
    • US5627879A
    • 1997-05-06
    • US204660
    • 1994-03-02
    • David S. RussellLarry G. FischerPhilip M. WalaCharles R. RatliffJeffrey Brennan
    • David S. RussellLarry G. FischerPhilip M. WalaCharles R. RatliffJeffrey Brennan
    • H04B10/20H04W16/24H04W36/18H04W88/08H04Q7/22
    • H04W88/085H04W16/24H04W36/18
    • A microcellular communications network includes a plurality of base station units and corresponding antenna units. The base station units are housed in a common location. Each includes either conventional transmitters and receivers or all digital transmitter and receiver equipment, and interface circuitry to a mobile telecommunications switching office. The microcell traffic output is applied to a frame generator/multiplexer. The output of the frame generator/multiplexer is applied to a digitally modulated laser. The laser output is conveyed by fiber to a remote antenna unit, which demultiplexes the microcell traffic signal and applies it to a digital-to-analog converter. The output of the digital-to-analog converter is applied to a power amplifier, which in turn is connected to a main antenna. RF signals from the mobile units are received at both a main and a diversity antenna. The received signals are filtered, digitized, multiplexed together and transmitted over the optical fiber back to the base station. The strongest signal is selected for use.
    • 微蜂窝通信网络包括多个基站单元和对应的天线单元。 基站单元位于公共位置。 每个都包括传统的发射机和接收机或所有数字发射机和接收机设备,以及到移动电信交换局的接口电路。 微小区流量输出被应用于帧发生器/多路复用器。 帧生成器/多路复用器的输出被应用于数字调制激光器。 激光输出由光纤传送到远程天线单元,其将多路复用微小区业务信号并将其应用于数模转换器。 数模转换器的输出被应用于功率放大器,功率放大器又连接到主天线。 来自移动单元的RF信号在主天线和分集天线两者都被接收。 接收的信号被滤波,数字化,多路复用在一起,并通过光纤传送回基站。 选择最强的信号使用。
    • 5. 再颁专利
    • Cellular communications system with sectorization
    • 蜂窝通信系统具有扇区化
    • USRE40564E1
    • 2008-11-04
    • US09747273
    • 2000-12-22
    • Larry G. FischerDavid S. RussellPhilip M. WalaCharles R. RatliffJeffrey O. Brennan
    • Larry G. FischerDavid S. RussellPhilip M. WalaCharles R. RatliffJeffrey O. Brennan
    • H04B1/38H04M1/00H04Q7/20H04Q7/30H04Q7/36
    • H04W88/085H04W16/24H04W36/18
    • A method and apparatus for sectorizing coverage of a cellular communications area includes providing a remote unit having microcell antenna units. Each microcell antenna unit is configured to cover a particular sector. The remote unit is connected to a sectorized base station unit which is connected to a mobile telecommunications switching office. Separate digitized streams representative of telephone signals received from the mobile telecommunications switching office are generated corresponding to the microcell antenna units and the separate digitized streams are multiplexed and transmitted to the remote unit. The remote unit demultiplexes the multiplexed digitized streams into the separate digitized streams corresponding to the microcell antenna units and the separate digitized streams are converted to RF signals for coverage of a particular sector by the corresponding microcell antenna unit. Separate digitized streams are separately generated for each microcell antenna unit representative of RF signals received at the microcell antenna unit for a particular sector. The separately generated digitized streams are multiplexed at the remote unit and transmitted to the sectorized base station unit. At the sectorized base station unit, the multiplexed digitized streams are demultiplexed into the separate digitized streams corresponding to microcell antenna units and the separate digitized streams are converted to RF signals for provision to the mobile telecommunications switching office. Diversity at the remote units is also provided.
    • 用于扇区化蜂窝通信区域的方法和装置包括提供具有微小区天线单元的远程单元。 每个微小区天线单元被配置为覆盖特定扇区。 远程单元连接到连接到移动电信交换局的分段基站单元。 对应于微小区天线单元生成代表从移动电信交换局接收的电话信号的单独的数字化流,并且单独的数字化流被多路复用并发送到远程单元。 远程单元将多路复用的数字化流解复用为与微小区天线单元相对应的单独的数字化流,并且将分离的数字化流转换为RF信号,以由对应的微小区天线单元覆盖特定扇区。 对于每个微小区天线单元分别生成代表在特定扇区的微小区天线单元处接收的RF信号的单独的数字流。 分离生成的数字化流在远程单元处被多路复用并发送到扇区化的基站单元。 在扇区化的基站单元,多路复用的数字化流被解复用到与微小区天线单元相对应的单独的数字化流中,并且分离的数字化流被转换为RF信号以提供给移动电信交换局。 还提供远程单位的多样性。
    • 6. 发明授权
    • Cellular communications system with centralized base stations and
distributed antenna units
    • 具有集中基站和分布式天线单元的蜂窝通信系统
    • US5657374A
    • 1997-08-12
    • US410129
    • 1995-03-23
    • David S. RussellLarry G. FischerPhilip M. Wala
    • David S. RussellLarry G. FischerPhilip M. Wala
    • H04B10/20H04W16/24H04W36/18H04W88/08H04Q7/22
    • H04W88/085H04W16/24H04W36/18
    • A method of communicating a plurality of two-way inbound/outbound cellular telephone transmissions between a base station and a physically remote cell using a set of channels. At the base station, a plurality of outbound telephone transmissions, received from a network, are analog modulated onto respective ones of RF analog outbound channel carriers. The modulated analog channel carriers are combined to form a single RF analog outbound signal representing all of the outbound telephone transmissions in the set of channels. The analog outbound combined signal is subsequently digitized into a single stream of outbound digital samples and transmitted to the remote cell. At the remote cell, the stream of digital samples is converted back to the RF analog outbound combined signal and broadcasted directly to mobile units in the cell. Further, the remote cell receives a plurality of simultaneous inbound telephone transmissions from the mobile units as an RF analog inbound combined signal. The analog inbound combined signal is digitized into a single stream of inbound digital samples and transmitted to the base station. At the base station, the stream of inbound digital samples is converted into a single RF analog inbound signal, the inbound telephone transmissions are recovered from the single RF analog inbound signal, and delivered to the network.
    • 一种使用一组信道在基站和物理上远程小区之间传送多个双向入站/出站蜂窝电话传输的方法。 在基站处,从网络接收的多个出站电话传输被模拟调制到RF模拟出站信道载体的相应的一个。 调制的模拟信道载波被组合以形成表示该组信道中的所有出站电话传输的单个RF模拟出站信号。 模拟出站组合信号随后被数字化为单个出站数字样本流并传输到远程小区。 在远程小区,数字样本流被转换回RF模拟出站组合信号,并直接广播到小区中的移动单元。 此外,远程小区从移动单元接收多个同时入站电话传输作为RF模拟入站组合信号。 模拟入站组合信号被数字化为单个入站数字采样流并传输到基站。 在基站,入站数字样本流被转换为单个RF模拟入站信号,入站电话传输从单个RF模拟入站信号中恢复,并传送到网络。