公开(公告)号：US08284826B2

公开(公告)日：2012-10-09

申请号：US11934684

申请日：2007-11-02

Applicant: Leonard N. Schiff ,  William G. Ames

Inventor： Leonard N. Schiff ,  William G. Ames

IPC: H04B3/46

CPC classification number: H04H20/18 ,  H04H20/67

Abstract: Synchronization of satellite and terrestrial broadcasts in a shared frequency arrangement is use in order to facilitate simultaneous reception of the broadcasts. A delay value is adjusted based on a synchronization between a first terrestrial broadcast and a satellite broadcast, and a delay value for a second terrestrial broadcast is adjusted based on a synchronization between the second terrestrial broadcast, the first terrestrial broadcast and the satellite broadcast. The adjustment of the relative delay values provides an improved reception pattern based on receipt of a shared frequency communication from multiple sources by improving a signal quality factor within at least selected regions of the coverage areas in which the relative delay values permit synchronization. This allows for synchronization lock between multiple substantially simultaneous broadcasts as determined by a cyclic prefix window of the broadcasts in overlapping coverage areas, useful for simultaneous satellite and terrestrial broadcasts using an OFDM format.

Abstract translation: 使用共享频率安排中的卫星和地面广播的同步，以便于同时接收广播。 基于第一地面广播和卫星广播之间的同步来调整延迟值，并且基于第二地面广播，第一地面广播和卫星广播之间的同步来调整用于第二地面广播的延迟值。 相对延迟值的调整通过改善相对延迟值允许同步的覆盖区域的至少所选区域内的信号质量因子，基于从多个源接收到共享频率通信来提供改进的接收模式。 这允许在重叠覆盖区域中的广播的循环前缀窗口确定的多个基本上同时的广播之间的同步锁定，对于使用OFDM格式的同时卫星和地面广播是有用的。

公开(公告)号：US07852800B2

公开(公告)日：2010-12-14

申请号：US10602358

申请日：2003-06-23

Applicant: Leonard N. Schiff ,  David S. Miller

Inventor： Leonard N. Schiff ,  David S. Miller

IPC: H04B7/212

CPC classification number: H04L1/0083 ,  H04L1/0006 ,  H04L1/0025

Abstract: Time-scattering of data is employed to reduce the interference effects, such as, error rate, between terminals disposed in nearby beams, or cells, of a communication system. A scattering schedule is determined, typically by a gateway, for a terminal. Scattering instructions, based at least in part on that scattering schedule, are provided to the terminal. The scattering instructions provide terminals with information suitable for controlling the temporal scattering of time slot data to be transmitted by the terminals so that interference impact of nearby out-of-beam terminals is reduced. Time-scattered data received by a receiver remote from the terminal is returned to the desired order by sorting the data in accordance with the scattering schedule to achieve a reversing of the scattering. Time-scattering may be applied to data moving in either or both of the forward and reverse directions of a communication system.

Abstract translation: 使用数据的时间散射来减少设置在通信系统的附近波束或小区中的终端之间的干扰效应，例如错误率。 通常由网关为终端确定散射调度。 至少部分地基于该散射计划的散射指令被提供给终端。 散射指令为终端提供适合于控制由终端发送的时隙数据的时间散射的信息，使得减少附近的射束外终端的干扰影响。 远离终端的接收器接收的时分散数据通过根据散射表排序数据而返回到所需的顺序，以实现散射的反转。 时间散射可以应用于在通信系统的正向和反向方向中的任一个或两者中移动的数据。

公开(公告)号：US07633895B2

公开(公告)日：2009-12-15

申请号：US10428953

申请日：2003-05-01

Applicant: Leonard N. Schiff ,  Ahmad Jalali

Inventor： Leonard N. Schiff ,  Ahmad Jalali

IPC: H04B7/212

CPC classification number: H04B7/216 ,  H04B7/18543 ,  H04B2201/70702 ,  Y02D70/446

Abstract: Orthogonal CDMA (OCDMA) in the return link of a satellite based communications system provides improved bandwidth efficiencies; increased ability to overcome channel degrading phenomenon; reduced transmission power; or various combinations thereof. By achieving code synchronization needed for advantageous use of OCDMA in the return link of a satellite based communication system, a plurality of terminals, each with a unique time slot/code channel assignment, may transmit concurrently, with the same, or lower, aggregate power as would be used by a single terminal using TDMA. Use of OCDMA in the return link allows one or more terminals, each in a common beam and assigned a common time slot, to transmit at a higher transmission power to overcome channel degradation effects. The ability to allow for higher transmission power for a particular terminal can increase the effective data rate for that terminal by enabling the use of a higher order modulation technique.

Abstract translation: 基于卫星通信系统的返回链路中的正交CDMA（OCDMA）提供了改进的带宽效率; 增强克服渠道退化现象的能力; 降低发射功率; 或其各种组合。 通过实现在基于卫星的通信系统的返回链路中有利地使用OCDMA所需的代码同步，每个具有唯一的时隙/码信道分配的终端可以以相同或更低的总功率同时发送 如将由使用TDMA的单个终端使用的那样。 在返回链路中使用OCDMA允许一个或多个终端，每个在公共波束中并且分配公共时隙，以更高的发射功率发射以克服信道劣化效应。 允许特定终端的较高发射功率的能力可以通过使用更高阶调制技术来增加该终端的有效数据速率。

公开(公告)号：US20090116543A1

公开(公告)日：2009-05-07

申请号：US11934684

申请日：2007-11-02

Applicant: Leonard N. Schiff ,  Williams G. Ames

Inventor： Leonard N. Schiff ,  Williams G. Ames

IPC: H04L7/00

CPC classification number: H04H20/18 ,  H04H20/67

Abstract: Synchronization of satellite and terrestrial broadcasts in a shared frequency arrangement is use in order to facilitate simultaneous reception of the broadcasts. A delay value is adjusted based on a synchronization between a first terrestrial broadcast and a satellite broadcast, and a delay value for a second terrestrial broadcast is adjusted based on a synchronization between the second terrestrial broadcast, the first terrestrial broadcast and the satellite broadcast. The adjustment of the relative delay values provides an improved reception pattern based on receipt of a shared frequency communication from multiple sources by improving a signal quality factor within at least selected regions of the coverage areas in which the relative delay values permit synchronization. This allows for synchronization lock between multiple substantially simultaneous broadcasts as determined by a cyclic prefix window of the broadcasts in overlapping coverage areas, useful for simultaneous satellite and terrestrial broadcasts using an OFDM format.

Abstract translation: 使用共享频率安排中的卫星和地面广播的同步，以便于同时接收广播。 基于第一地面广播和卫星广播之间的同步来调整延迟值，并且基于第二地面广播，第一地面广播和卫星广播之间的同步来调整用于第二地面广播的延迟值。 相对延迟值的调整通过改善相对延迟值允许同步的覆盖区域的至少所选区域内的信号质量因子，基于从多个源接收到共享频率通信来提供改进的接收模式。 这允许在重叠覆盖区域中的广播的循环前缀窗口确定的多个基本上同时的广播之间的同步锁定，对于使用OFDM格式的同时卫星和地面广播是有用的。

公开(公告)号：US06671250B1

公开(公告)日：2003-12-30

申请号：US09376822

申请日：1999-08-17

Applicant: Leonard N. Schiff

Inventor： Leonard N. Schiff

IPC: H04J1100

CPC classification number: H04B7/185 ,  H04B7/18513 ,  H04B7/18567 ,  H04J13/0048

Abstract: A method for deep paging in a communication system employing orthogonal channelizing codes, such as Walsh sequences, of predetermined length m, that does not require a high powered paging channel. The method includes the steps of generating a paging channel message which is combined with a Walsh sequence having a length greater than or equal to 2m, and transmitting the paging channel message at a data rate of less than 4800 bits per second (bps). By transmitting the paging channel message at a low data rate and integrating collected energy over a period longer by a factor on the order of 1000, the message is able to penetrate buildings and other structures or high attenuation environments, thereby allowing one to successfully page a user terminal that is inside such a structure or area. Preferably, the paging channel message is formed using an auxiliary Walsh sequence on the order of 65536 chips in length, and the data rate is less than 10 bps.

Abstract translation: 一种在不需要高功率寻呼信道的情况下，采用具有预定长度m的正交信道化码（例如沃尔什序列）的通信系统中的深度寻呼的方法。 该方法包括以下步骤：生成与长度大于或等于2m的沃尔什序列组合的寻呼信道消息，并以小于4800比特每秒（bps）的数据速率发送寻呼信道消息。 通过以低数据速率发送寻呼信道消息并将收集的能量在长达1000个数量级的时间段内集成，该消息能够穿透建筑物和其他结构或高衰减环境，从而允许一个成功地寻呼 在这样的结构或区域内的用户终端。 优选地，使用长度为65536个码片的辅助沃尔什序列来形成寻呼信道消息，并且数据速率小于10bps。

公开(公告)号：US06298242B1

公开(公告)日：2001-10-02

申请号：US09358997

申请日：1999-07-22

Applicant: Leonard N. Schiff

Inventor： Leonard N. Schiff

IPC: H04B700

CPC classification number: H04W52/18 ,  H04B7/18543 ,  H04W52/20

Abstract: A method and apparatus for controlling a signal transmission power. The method of the present invention includes the steps of demodulating a received signal to produce a demodulated signal and distorting the demodulated signal to produce a distorted demodulated signal. The demodulated signal can be distorted by, for example, adding noise. A signal quality measurement, such as signal-to-noise ratio, is then determined based on the distorted demodulated signal rather than the demodulated signal. An adjustment in the transmission power is then requested based on the signal quality measurement of the distorted demodulated signal.

Abstract translation: 一种用于控制信号传输功率的方法和装置。 本发明的方法包括以下步骤：对接收信号进行解调以产生解调信号并使解调信号失真以产生失真的解调信号。 解调信号可以通过例如增加噪声而失真。 然后，基于失真的解调信号而不是解调信号来确定诸如信噪比之类的信号质量测量。 然后基于失真的解调信号的信号质量测量来请求发送功率的调整。

公开(公告)号：US6028884A

公开(公告)日：2000-02-22

申请号：US172742

申请日：1998-10-14

Applicant: Amnon Silberger ,  Brian Butler ,  Leonard N. Schiff

Inventor： Amnon Silberger ,  Brian Butler ,  Leonard N. Schiff

IPC: H04B17/00 ,  H04Q7/38 ,  H04B15/00

CPC classification number: H04B17/0085 ,  H04B17/309

Abstract: A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density for the empty to the active channels is then formed. The determination of WPR for a system or components can be realized during periods of operation through periodic transfer of test signals either at allocated times or by interleaving among existing traffic signals in the system.

Abstract translation: 一种用于准确地确定非线性效应对传送正交编码扩频通信信号的设备或通信系统的操作特性或影响的方法和装置。 沃尔什功率比，用于更准确地确定系统响应。 该信息可以由功率控制环路用于控制或调整正交CDMA通信系统中的非线性元件或级（例如高功率放大器）的操作，以提供改进的系统响应。 该信息还可用于向系统用户分配通道，并对系统硬件进行物理更改。 用于制定WPR的测量可以通过在包含数据的多个通道中注入通信信号并留下至少一个空通道来对单个组件或整个系统进行。 然后测量系统或设备输出侧每个通道的接收功率。 然后形成空的活动通道的功率密度比。 系统或部件的WPR的确定可以在操作期间通过在分配的时间周期性地传送测试信号或者通过系统中的现有业务信号之间的交错来实现。

公开(公告)号：US4933765A

公开(公告)日：1990-06-12

申请号：US238694

申请日：1988-08-30

Applicant: Leonard N. Schiff ,  Jack S. Fuhrer

Inventor： Leonard N. Schiff ,  Jack S. Fuhrer

IPC: H04N11/14 ,  H04N7/015 ,  H04N7/26 ,  H04N9/64 ,  H04N11/24

CPC classification number: H04N11/002 ,  H04N7/015 ,  H04N9/646

Abstract: A television system for generating video signals for reception by a receiver having adaptive processing circuitry susceptible of errors includes circuitry for emulating portions of the receiver and detecting the occurrences of such errors. A signal representing the occurrences of the errors is generated and combined with the transmitted video signal. At the receiver the error signal is separated from the video signal and utilized by the adaptive processing circuitry to ameliorate the effects of such errors.

Abstract translation: 用于产生用于由具有易错误的自适应处理电路的接收机接收的视频信号的电视系统包括用于模拟接收机的部分并检测这种错误的发生的电路。 产生表示错误发生的信号并与所发送的视频信号组合。 在接收机处，误差信号与视频信号分离，并由自适应处理电路利用，以改善这种误差的影响。

公开(公告)号：US4639932A

公开(公告)日：1987-01-27

申请号：US770561

申请日：1985-08-29

Applicant: Leonard N. Schiff

Inventor： Leonard N. Schiff

IPC: H04B1/707 ,  H04K1/02

CPC classification number: H04B1/707

Abstract: A transmitter and receiver for direct sequence spread-spectrum (SS) communications is described. The audio or other analog information to be communicated controls the clock rate of a pseudorandom sequence (PRS) to produce clock rate encoded direct sequence spread spectrum signals. The signals are decoded by a feedback loop including a voltage controlled oscillator which clocks a local PRS generator. A phase detector responds to the clock rate encoded received PRS signal and to the local PRS signal to produce a control signal. The control signal is filtered and applied to the VCO to control the local PRS clock rate. The decoder loop forces the VCO rate to track the clock rate of the encoded signal, and the decoder loop VCO control signal reproduces the analog information. A demodulator for a clock rate encoded SS signal upconverted by a carrier includes a pair of mixers, a first of which receives the signal to be demodulated and the local PRS sequence from the decoder. When the local and received sequence are phase coincident, the first mixer produces the carrier. The second mixer receives the signal to be demodulated and the carrier from the first mixer and generates therefrom demodulated baseband clock rate encoded SS signals for application to the decoder.

Abstract translation: 描述了用于直接序列扩频（SS）通信的发射机和接收机。 要传送的音频或其他模拟信息控制伪随机序列（PRS）的时钟速率以产生时钟速率编码的直接序列扩频信号。 信号由包括对本地PRS发生器进行计时的压控振荡器的反馈回路解码。 相位检测器响应于编码的接收PRS信号的时钟速率和本地PRS信号以产生控制信号。 控制信号被滤波并施加到VCO以控制本地PRS时钟速率。 解码器环路迫使VCO速率跟踪编码信号的时钟速率，解码器环路VCO控制信号再现模拟信息。 用于由载波上变频的时钟速率编码的SS信号的解调器包括一对混频器，其中一个混频器从解码器接收待解调的信号和本地PRS序列。 当本地和接收的序列是相位一致时，第一个混频器产生载波。 第二混频器从第一混频器接收要被解调的信号和载波，并从其中产生用于应用于解码器的解调的基带时钟速率编码的SS信号。

公开(公告)号：US4630283A

公开(公告)日：1986-12-16

申请号：US755921

申请日：1985-07-17

Applicant: Leonard N. Schiff

Inventor： Leonard N. Schiff

IPC: H04B1/707 ,  H04B1/7085 ,  H04B7/216 ,  H03D3/24 ,  H04B1/06

CPC classification number: H04B1/7085 ,  H04B1/707 ,  H04B7/216 ,  H04B2201/70701

Abstract: A high frequency code division multiple access spread spectrum (CDMA SS) communications system includes multiple transmitters and their associated receivers, and a pilot carrier source. In order to reduce errors in the receiver IF frequency due to unavoidable differences between the desired transmitted carrier and receiver local oscillator (LO), the transmitted carrier ferquency is related to the pilot frequency. The receiver phase-locks the pilot carrier to the local oscillator, thereby providing an IF data signal with reduced frequency error. The IF data signal is multiplied by sine and cosine demodulating signals related to the local oscillator frequency to produce inphase (I) and quadrature (Q) components of the received data signal. The I and Q signals are applied to code matched filters, which produce filtered or decoded signals the amplitudes of which are related to the phase error between the demodulating signals and the IF carrier. A logic arrangement responds to the decoded signals to generate a control signal which step-corrects the demodulating signal to the correct phase. Correction can occur within one or a few bit intervals, thereby allowing burst mode communications while maintaining high throughput for the multiple users of the communication system.

Abstract translation: 高频码分多址扩频（CDMA SS）通信系统包括多个发射机及其相关接收机，以及导频载波源。 为了减少由于期望的发射载波和接收机本地振荡器（LO）之间的不可避免的差异导致的接收机IF频率中的误差，发射的载波频率与导频有关。 接收机将导频载波相位锁定到本地振荡器，从而提供具有降低的频率误差的IF数据信号。 IF数据信号乘以与本地振荡器频率相关的正弦和余弦解调信号，以产生接收数据信号的同相（I）和正交（Q）分量。 I和Q信号被施加到码匹配滤波器，其产生滤波或解码的信号，其幅度与解调信号和IF载波之间的相位误差有关。 逻辑布置响应于解码信号以产生将解调信号逐步校正到正确相位的控制信号。 校正可以在一个或几个位间隔内发生，从而允许突发模式通信，同时为通信系统的多个用户保持高吞吐量。