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    • 4. 发明授权
    • Multi-beam satellite communication system with user terminal frequencies
having transceivers using the same set of frequency hopping
    • 多波束卫星通信系统,其用户终端频率具有使用相同组跳频的收发器
    • US5638399A
    • 1997-06-10
    • US341869
    • 1994-11-15
    • Leonard SchuchmanAaron WeinbergRonald Bruno
    • Leonard SchuchmanAaron WeinbergRonald Bruno
    • H04B7/185H04B15/00H04K1/04H04L27/30
    • H04B7/18576Y02B60/50
    • The satellite radio communication system of this invention provides communication between one or more service centers and an ensemble of fixed and mobile user terminals. One or more earth orbiting satellites are provided with each satellite having transmitter forming a down-link channel which is slow frequency hopped, and a multi-beam antenna system with a single channel per beam to time division multiple broadcast signals to all user terminals covered by each said beam, respectively. Each user terminal includes a transceiver for receiving a down-link channel broadcast from the one of said beams in whose path it lies, and a return link comprised of a dedicated narrow band broadcast channel with slow frequency hopping of down-link channel. There is a fixed set of frequencies through which the frequency hopping is carried out, with the plurality of fixed and mobile user terminals using the same set of frequency hopping frequencies. Mutually synchronized transmissions from each user is such that while the ensemble of users display the same set of frequency hopping frequencies, each user in said ensemble of fixed and mobile user terminals employs a unique frequency at each instant of time.
    • 本发明的卫星无线电通信系统提供一个或多个服务中心与固定和移动用户终端的集合之间的通信。 提供一个或多个地球轨道卫星,每个卫星具有形成低频跳频的下行链路信道的发射机,以及每个波束具有单个信道的多波束天线系统,以分时多个广播信号给所有用户终端覆盖 每个所述光束。 每个用户终端包括收发器,用于从其所在的所述路径中的所述波束中的一个接收广播的下行链路信道,以及由具有下行链路信道的慢跳频的专用窄带广播信道组成的返回链路。 有一组固定频率通过跳频执行,多个固定和移动用户终端使用相同的跳频频率组。 来自每个用户的相互同步的传输使得当用户的组合显示相同的跳频频率组时,固定和移动用户终端的所述组合中的每个用户在每个时刻采用唯一的频率。
    • 5. 发明授权
    • Digital audio broadcasting system
    • 数字音频广播系统
    • US5283780A
    • 1994-02-01
    • US598396
    • 1990-10-18
    • Leonard SchuchmanJohn E. MillerRonald Bruno
    • Leonard SchuchmanJohn E. MillerRonald Bruno
    • H04B1/692H04B1/713H04B1/715H04H20/71H04H60/11H04L1/00H04L1/04H04L25/03H04L27/26H04J4/00
    • H04H20/71H04B1/713H04L1/0059H04L1/0071H04L1/04H04L25/03044H04L27/2602H04L27/2626H04B1/692H04B1/715H04B2001/7152H04H2201/20H04H60/11H04L2025/03401H04L2025/03414H04L2025/03477H04L2025/03509
    • A digital audio broadcasting system that is capable of providing a large number of high quality stereophonic channels to mobile receivers in an environment with severe multipath delay and fading. Optimum combination of frequency and time diversity to guarantee robust performance in the mobile channel, with its multipath delay and frequency-selective fading effects. The system is based upon a dynamic single channel per carrier assignment of each stereo channel to many carriers. Intersymbol interference degradations caused by multipath delay are mitigated via an adaptive equalizer in the receiver. This dynamic single channel per carrier system preserves the simplicity inherent in the single channel per carrier assignment while it incorporates the ability to address frequency-selective fading by providing substantial frequency diversity. The frequency diversity is achieved via a slow frequency hop implementation in which the assignment of a number of stereo channels to an equal number of carrier frequencies is changed periodically. The system offers the simplicity of single channel per carrier assignment of stereo channels while it achieves the powerful performance benefits of frequency diversity and adaptive equalization for the mobile channel.
    • 一种数字音频广播系统,其能够在具有严重的多径延迟和衰落的环境中向移动接收机提供大量高质量立体声信道。 频率和时间分集的最佳组合,以保证移动通道的鲁棒性能,具有多径延迟和频率选择性衰落效应。 该系统基于每个载波分配到每个立体声信道到多个载波的动态单个信道。 通过接收机中的自适应均衡器来减轻由多径延迟引起的符号间干扰降低。 每个载波系统的这种动态单信道保留了每个载波分配的单信道固有的简单性,同时它具有通过提供实质的频率分集来寻址频率选择性衰落的能力。 通过慢速跳频实现来实现频率分集,其中将多个立体声信道分配到相同数量的载波频率周期性地改变。 该系统提供单通道每个载波分配立体声通道的简单性,同时实现了对于移动通道的频率分集和自适应均衡的强大的性能优势。
    • 6. 发明授权
    • Digital broadcast system
    • 数字广播系统
    • US5912917A
    • 1999-06-15
    • US073442
    • 1993-06-08
    • Lloyd EngelbrechtLeonard SchuchmanRonald Bruno
    • Lloyd EngelbrechtLeonard SchuchmanRonald Bruno
    • H04B1/69H04B1/713H04H20/42H04H20/71H04H60/11H04L1/00H04L1/04H04L25/03H04L27/26H04B7/02
    • H04H20/06H04B1/713H04H20/42H04H20/71H04L1/0059H04L1/0071H04L1/04H04L25/03044H04L27/2602H04L27/2626H04B1/692H04B1/715H04B2001/7152H04H2201/20H04H60/11H04L1/0054H04L2025/03401H04L2025/03414H04L2025/03477H04L2025/03509
    • A digital broadcast system, comprising a master radio broadcast station located at a main predetermined location for formatting and broadcasting a plurality of channels of digitized program data in a spread spectrum, time and frequency hopping waveform to remote mobile and stationary receivers. A plurality of relatively low power range extension radio broadcast stations are provided, each said range extension station being located in selected areas and, each range extension station being adapted to receive and store one or more channels of program information from the master station. A separate program distribution system coupling the received and store of each range extension radio broadcast station with the master radio broadcast station, said separate distribution system, including, for each range extension station at least one path selected form satellite, microwave, fiber-optic, coaxial cable and telephone paths, for coupling one or more channels of program information to each range extension station. The channels of digital data re-broadcast from each of the range extension radio broadcast stations is synchronized with broadcasts from the master radio broadcast station such that a mobile receiver traveling between edges of reception of two or more low power range extension radio broadcast stations does not evidence interference therebetween.
    • 一种数字广播系统,包括位于主要预定位置的主无线电广播站,用于格式化和广播扩展频谱中的多个数字化节目数据信道,向远程移动和固定接收机发送时间和跳频波形。 提供了多个相对较低功率范围的扩展无线电广播站,每个所述范围扩展站位于所选择的区域中,并且每个范围扩展站适于从主站接收和存储节目信息的一个或多个信道。 一个单独的节目分发系统,将每个范围扩展无线电广播台的接收和存储与主无线电广播站相连,所述分开的分配系统包括对于每个范围扩展站,至少一个从卫星,微波,光纤, 同轴电缆和电话路径,用于将节目信息的一个或多个信道耦合到每个范围扩展站。 从每个范围扩展无线电广播站重新广播的数字数据信道与来自主无线电广播台的广播同步,使得在两个或更多个低功率范围扩展无线电广播站的接收边缘之间行进的移动接收机不 证据之间的干涉。
    • 7. 发明授权
    • Cellular positioning system (CPS)
    • 蜂窝定位系统(CPS)
    • US06111538A
    • 2000-08-29
    • US393312
    • 1995-02-23
    • Leonard SchuchmanRonald BrunoLloyd EngelbrechtAaron Weinberg
    • Leonard SchuchmanRonald BrunoLloyd EngelbrechtAaron Weinberg
    • G01S1/00G01S5/02G01S5/14G01S19/09G01S19/21G01S19/46G01S19/48H04B1/69H04W4/06H04W28/04H04W48/08H04W64/00H04W72/12H04W84/04H04B7/185
    • G01S5/14G01C21/206G01S1/68G01S19/21G01S19/46G01S5/0236G01S5/145H04B1/69H04L27/103
    • Positioning system for locating a mobile body comprising a plurality of earth based spread spectrum (SS) broadcasting stations arranged geographically in a cellular pattern. Each SS broadcasting station include a modulator providing a channel signal structure which is substantially orthogonal with respect to adjacent stations in the cellular pattern, each channel signal including navigation beacon data including a unique beacon identification, station latitude and longitude, time.sub.-- slot and phase characterizations and selected parameters of adjacent stations. In one embodiment, each modulator provides a chirped SS signal in which the navigation beacon is a frequency tone that is repeatedly swept over a selected frequency band for each station. In a further embodiment, each modulator provides a GPS like direct sequence SS signal in which the navigation beacon is a PN coded broadcast. A receiver on the mobile body receives the SS signals from at least three of the SS broadcasting stations and determines the location thereof. A fourth SS broadcasting station provides altitude. CPS satellite signals can be used for timing control.
    • 用于定位移动体的定位系统,所述移动体包括以蜂窝状图案地理布置的多个基于地球的扩频(SS)广播站。 每个SS广播站包括调制器,其提供相对于蜂窝模式中的相邻站基本正交的信道信号结构,每个信道信号包括导航信标数据,其包括唯一信标标识,站纬度和经度,时隙和相位表征 并选择相邻站的参数。 在一个实施例中,每个调制器提供啁啾SS信号,其中导航信标是针对每个站重复地扫过选定频带的频率音调。 在另一实施例中,每个调制器提供类似GPS的直接序列SS信号,其中导航信标是PN编码广播。 移动体上的接收机从SS广播站中的至少三个SS接收SS信号并确定其位置。 第四个SS广播电台提供高度。 CPS卫星信号可用于定时控制。