公开(公告)号：US08417181B2

公开(公告)日：2013-04-09

申请号：US12817883

申请日：2010-06-17

Applicant: Ahmad Jalali

Inventor： Ahmad Jalali

IPC: H04B7/15

CPC classification number: H04B7/18504

Abstract: Aeronautical broadband communication is enhanced by providing an apparatus having a first antenna configured to communicate using a signal orientation corresponding to a first polarization, and a second antenna configured to communicate using a signal orientation corresponding to a second polarization, where the second polarization has at least one characteristic difference from the first polarization. Additional antennas may be used, where multiple antennas share one polarization, and multiple other antennas share a different polarization, and signals from like-polarized antennas are combined for beam-formation.

Abstract translation: 通过提供具有第一天线的装置来增强航空宽带通信，所述第一天线被配置为使用与第一极化相对应的信号方向进行通信，以及第二天线，被配置为使用与第二极化对应的信号取向进行通信，其中第二极化具有至少 与第一极化有一个特征差异。 可以使用附加的天线，其中多个天线共享一个极化，并且多个其它天线共享不同的极化，并且组合来自相同极化天线的信号用于波束形成。

公开(公告)号：US20110286325A1

公开(公告)日：2011-11-24

申请号：US13109302

申请日：2011-05-17

Applicant: Ahmad Jalali ,  Ranganathan Krishnan ,  Bin Tian

Inventor： Ahmad Jalali ,  Ranganathan Krishnan ,  Bin Tian

IPC: G06F11/00

CPC classification number: H04B7/18506 ,  H04B7/18504 ,  H04B7/18584 ,  H04B7/18589

Abstract: A hybrid satellite-mesh network including a ground segment, a mobile segment and a satellite segment provides high bandwidth communication between mobile platforms and the Internet. The satellite segment is used only when mesh network communication links between mobile segment nodes and ground segment nodes are unavailable. Mobile segment nodes can function in either an access terminal mode or an access point mode to communicate with other mobile segment nodes according to a routing algorithm in a mesh portion of the network. Mobile segment nodes employ adaptive frequency reuse, link level date rate adaptation, link level power control and adaptive beam forming antennas.

Abstract translation: 包括地面段，移动段和卫星段的混合卫星网状网络在移动平台和因特网之间提供高带宽通信。 仅当移动节点节点和地面节点节点之间的网状网络通信链路不可用时才使用卫星节点。 移动节点节点可以在接入终端模式或接入点模式下工作，以根据网络的网状部分中的路由算法与其他移动节点节点进行通信。 移动节点节点采用自适应频率重用，链路级日期速率适配，链路级功率控制和自适应波束形成天线。

公开(公告)号：US20110128867A1

公开(公告)日：2011-06-02

申请号：US12627974

申请日：2009-11-30

Applicant: Bin Tian ,  Ahmad Jalali ,  Srikant Jayaraman ,  June Namgoong

Inventor： Bin Tian ,  Ahmad Jalali ,  Srikant Jayaraman ,  June Namgoong

IPC: H04L12/26 ,  H04B7/14

CPC classification number: H04B7/18543 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/08 ,  Y02D50/10

Abstract: In a synchronous application to control forward link (FL) data rates in a satellite system, user equipment (UE) repeatedly transmits a quality control measurement (QCM) index during a QCM period. During this QCM period, the data rate cannot change. The associated satellite transmits at a new rate corresponding to the QCM index. The UE knows that it will begin receiving new data at the new rate after a QCM delay. In an asynchronous application, a satellite transmits a rate change signal over a FL rate indication channel (RICH). A UE monitors the FL RICH for this signal. When the signal quality is to be low, the satellite sends only a single bit of the QCM index over a first orthogonal channel. When the signal quality is not low, the satellite transmits each bit of the QCM index in a separate orthogonal channel of the FL RICH.

Abstract translation: 在用于在卫星系统中控制前向链路（FL）数据速率的同步应用中，用户设备（UE）在QCM周期期间重复发送质量控制测量（QCM）索引。 在这个QCM期间，数据速率不能改变。 相关联的卫星以对应于QCM指数的新速率发射。 UE知道在QCM延迟之后，它将以新的速率开始接收新的数据。 在异步应用中，卫星通过FL速率指示信道（RICH）发送速率改变信号。 UE监视该信号的FL RICH。 当信号质量低时，卫星在第一个正交信道上只发送一个QCM索引的比特。 当信号质量不低时，卫星在FL RICH的单独的正交信道中发送QCM索引的每个比特。

公开(公告)号：US07751492B2

公开(公告)日：2010-07-06

申请号：US11165451

申请日：2005-06-23

Applicant: Ahmad Jalali ,  Jay Rodney Walton

Inventor： Ahmad Jalali ,  Jay Rodney Walton

IPC: H04B7/02

CPC classification number: H04L5/023

Abstract: For certain embodiments of this application, a method and apparatus for generating pilots in a wireless multiple-input multiple output (MIMO) communication system is disclosed. The certain embodiments can include obtaining at least one pilot symbol for each antenna of a plurality of antennas, obtaining an orthogonal sequence for each antenna in the plurality of antennas, and covering the at least one pilot symbol for each antenna with the orthogonal sequence to obtain a sequence of covered pilot symbols for each antenna to obtain at least one covered pilot symbols for each of the plurality of antennas.

Abstract translation: 对于本申请的某些实施例，公开了一种用于在无线多输入多输出（MIMO）通信系统中生成导频的方法和装置。 某些实施例可以包括为多个天线中的每个天线获得至少一个导频符号，为多个天线中的每个天线获得正交序列，并用正交序列覆盖每个天线的至少一个导频符号，以获得 用于每个天线的覆盖导频符号的序列，以获得用于所述多个天线中的每一个的至少一个被覆盖的导频符号。

公开(公告)号：US20100142638A1

公开(公告)日：2010-06-10

申请号：US12704111

申请日：2010-02-11

Applicant: Ahmad Jalali ,  Jay R. Walton ,  Mark Wallace

Inventor： Ahmad Jalali ,  Jay R. Walton ,  Mark Wallace

IPC: H04L27/28

CPC classification number: H04L5/023

Abstract: Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).

Abstract translation: 发射机和接收机单元，用于OFDM通信系统并可配置为支持多种类型的业务。 发射机单元包括一个或多个编码器，符号映射元件和调制器。 每个编码器接收和编码相应的信道数据流以生成对应的编码数据流。 符号映射元件接收并映射来自编码数据流的数据以产生调制符号向量，其中每个调制符号向量包括用于调制一组音调以生成OFDM符号的一组数据值。 调制器调制调制符号向量以提供适于传输的调制信号。 来自每个编码数据流的数据被映射到一个或多个“电路”的相应集合。 每个电路可以被定义为包括来自多个OFDM符号的多个音调，来自单个OFDM符号的多个音调，来自一个或多个OFDM符号的所有音调，或一些其它音调组合。 电路可以具有相同的尺寸或不同的尺寸。 不同的电路可以用于全速率数据（例如，活动语音）和低速率数据（例如，静默时段）。

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：US07333560B2

公开(公告)日：2008-02-19

申请号：US11328807

申请日：2006-01-09

Applicant: Ahmad Jalali ,  John E. Smee ,  Mark Wallace

Inventor： Ahmad Jalali ,  John E. Smee ,  Mark Wallace

IPC: H04K1/02

CPC classification number: H04L1/0032 ,  H04B7/0434 ,  H04B7/0626 ,  H04L1/0003 ,  H04L1/0013 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/06 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.

Abstract translation: 在时分双工（TDD）通信系统中处理用于传输的数据的技术。 在一个方面，基于来自终端的反向链路传输（例如，导频）在基站处估计前向链路的频率响应。 在前向链路上的数据传输之前，基站基于终端发送的导频来确定反向传递函数，使用校准函数“校准”反向传递函数，以导出前向传递函数的估计，以及前提条件 基于从前向传递函数导出的权重的调制符号。 在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。 然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得所发送的数据能够以期望的性能水平由终端接收。

公开(公告)号：US20080025249A1

公开(公告)日：2008-01-31

申请号：US11829869

申请日：2007-07-27

Applicant: Kalyan Kuppuswamy ,  June Namgoong ,  Srikant Jayaraman ,  Ahmad Jalali

Inventor： Kalyan Kuppuswamy ,  June Namgoong ,  Srikant Jayaraman ,  Ahmad Jalali

IPC: H04B7/204

CPC classification number: H04B7/18567

Abstract: A communication system is provided that allows a mobile terminal with an EVDO interface to perform VoIP communications via a satellite. The 1xEVDO physical layer frames and vocoder frames are synchronized and aligned to a known periodic time boundary for efficient transmission. A reverse link transmission rate is adjusted to match a VoIP packet source rate and operate the reverse link transmission channel to a satellite continuously. The reverse link transmission channel from a mobile terminal to a satellite may operate continuously and at a lower channel transmission rate to reduce the peak power amplifier power requirement. The higher layer time-out periods are increased to account for propagation delay to/from a satellite relay. A physical layer retransmit mechanism is disabled to ignore ACKs/NACKs when sending VoIP packets via a satellite relay. A different channel code may be selective applied depending on the size/type of packets being transmitted.

Abstract translation: 提供一种通信系统，其允许具有EVDO接口的移动终端经由卫星执行VoIP通信。 1xEVDO物理层帧和声码器帧被同步并对齐到已知的周期时间边界以进行有效传输。 调整反向链路传输速率以匹配VoIP分组源速率并且连续地向卫星操作反向链路传输信道。 从移动终端到卫星的反向链路传输信道可以连续地以较低的信道传输速率工作，以降低峰值功率放大器的功率需求。 更高层的超时周期被增加以考虑到/从卫星中继的传播延迟。 当通过卫星中继发送VoIP分组时，物理层重传机制被禁止忽略ACK / NACK。 根据发送的分组的大小/类型，可以选择性地应用不同的信道码。

公开(公告)号：US20080001812A1

公开(公告)日：2008-01-03

申请号：US11555859

申请日：2006-11-02

Applicant: Ahmad Jalali

Inventor： Ahmad Jalali

IPC: H04B7/185

CPC classification number: H04B7/2041 ,  H04B7/0408

Abstract: A satellite communication system designed to communicate with wireless communication devices (WCDs) by use of a mosaic pattern of signal beams uses multiple beams to augment the communication with individual WCDs. In addition to communication with a WCD through a primary beam for that WCD, adjacent beams are used, but with signals utilizing circuit parameters assigned to the primary beam. The signals from a given WCD are relayed in a backhaul, either as an aggregate signal processed by the satellite, or as backhaul communication signals to be combined or separated on the ground.

Abstract translation: 设计为通过使用信号束的马赛克图案与无线通信设备（WCD）通信的卫星通信系统使用多个波束来增强与各个WCD的通信。 除了通过用于该WCD的主波束与WCD的通信之外，还使用相邻的波束，但是使用分配给主波束的电路参数的信号。 来自给定WCD的信号在作为由卫星处理的聚合信号的回程中进行中继，或作为在地面上组合或分离的回程通信信号。

公开(公告)号：US20060093067A1

公开(公告)日：2006-05-04

申请号：US11298639

申请日：2005-12-08

Applicant: Ahmad Jalali ,  Jay Walton ,  Mark Wallace

Inventor： Ahmad Jalali ,  Jay Walton ,  Mark Wallace

IPC: H04B7/06 ,  H04K1/10

CPC classification number: H04L5/023

Abstract: Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).