公开(公告)号：US20130267267A1

公开(公告)日：2013-10-10

申请号：US13605898

申请日：2012-09-06

Applicant: Syed Aon Mujtaba ,  Tarik Tabet ,  Paul V. Flynn ,  Kee-Bong Song

Inventor： Syed Aon Mujtaba ,  Tarik Tabet ,  Paul V. Flynn ,  Kee-Bong Song

IPC: H04W36/30 ,  H04W68/00 ,  H04W88/06

CPC classification number: H04W36/0066 ,  H04W36/0088 ,  H04W76/28

Abstract: A user equipment (UE) operating in a communication system comprising a base station and one or more UEs. The UE may be configured to operate on or “camp” on two different networks with one radio. In this exemplary system, the radio may be normally connected to the first network (NW1) and may from time to time be “tuned away” from NW1 to a second network (NW2). The UE may inform NW1 that it has tuned away to another network, e.g., using start and end indicators. This information may prevent NW1 from wasting downlink capacity by unnecessarily allocating downlink resources to the UE during the tune-away. Alternatively, or in addition, this information may prevent NW1 from penalizing the UE, e.g., by reducing its future downlink allocations, since the UE does not respond to NW1 commands during the tune-away.

Abstract translation: 在包括基站和一个或多个UE的通信系统中操作的用户设备（UE）。 UE可以被配置为在具有一个无线电的两个不同网络上操作或“驻留”。 在该示例性系统中，无线电可以正常地连接到第一网络（NW1），并且可以不时地从NW1“被调离”到第二网络（NW2）。 UE可以通知NW1已经将其调离到另一个网络，例如使用开始和结束指示符。 该信息可以防止NW1在调谐期间不必要地向UE分配下行链路资源来浪费下行链路容量。 或者或另外，该信息可以防止NW1惩罚UE，例如通过减少其未来的下行链路分配，因为UE在调谐期间不响应NW1命令。

公开(公告)号：US20090245408A1

公开(公告)日：2009-10-01

申请号：US12249739

申请日：2008-10-10

Applicant: Syed Aon Mujtaba ,  Xiaowen Wang

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang

IPC: H04B7/02

CPC classification number: H04B7/0417 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/068 ,  H04B7/0689 ,  H04L1/0016

Abstract: A Channel Quality Indicator table for wireless multiple input multiple output (MIMO) networks is disclosed. In one embodiment, a method of generating a table for channel quality indicator (CQI) for an open loop MIMO transmission includes calculating performance of a link between a transmitter and a user end unit for each MIMO transmission mode over a range of average signal-to-noise ratio, and selecting the MIMO transmission mode that maximizes performance for each subset of the range of average signal-to-noise ratio. The method further includes storing the selected MIMO transmission mode and the corresponding subset of the range of average signal-to-noise ratio in a CQI table, the CQI table being stored in an user end unit and a base transceiver station of the open loop MIMO network.

Abstract translation: 公开了一种用于无线多输入多输出（MIMO）网络的信道质量指标表。 在一个实施例中，生成用于开环MIMO传输的信道质量指示符（CQI）的表的方法包括：在平均信号到平均信号的范围内，针对每个MIMO传输模式来计算发射机和用户端单元之间的链路的性能 并且选择使平均信噪比范围的每个子集的性能最大化的MIMO传输模式。 该方法还包括将所选择的MIMO传输模式和平均信噪比范围的相应子集存储在CQI表中，该CQI表被存储在开环MIMO的用户端单元和基站中 网络。

公开(公告)号：US07424278B2

公开(公告)日：2008-09-09

申请号：US11022317

申请日：2004-12-23

Applicant: Edward E. Campbell ,  Syed Aon Mujtaba

Inventor： Edward E. Campbell ,  Syed Aon Mujtaba

IPC: H04B1/18

CPC classification number: H04B1/30 ,  H04B1/1027 ,  H04B2001/1045

Abstract: A low IF mixer and method for down-converting a signal at a desired frequency are disclosed with improved selectivity performance. The energy of sidebands on each side of the desired frequency is evaluated; and a local oscillator frequency is selected based on the evaluation of the energy. Generally, the local oscillator frequency associated with the sideband having a lower energy is selected. The desired frequency may have a frequency of RF and the sidebands have a frequency of the desired frequency plus or minus an offset frequency (RF+IF or RF−IF). The signal at the desired frequency may be multiplied by the selected local oscillator frequency to down-convert the signal.

Abstract translation: 具有改进的选择性性能的低IF混频器和用于以期望频率下变频的方法被公开。 对期望频率的每一侧的边带的能量进行评估; 并且基于能量的评估来选择本地振荡器频率。 通常，选择与具有较低能量的边带相关联的本地振荡器频率。 期望的频率可以具有RF的频率，并且边带具有所需频率的频率加或减偏移频率（RF + IF或RF-IF）。 以所需频率的信号可以乘以所选择的本地振荡器频率以对信号进行下变频。

公开(公告)号：US06950678B1

公开(公告)日：2005-09-27

申请号：US09576999

申请日：2000-05-24

Applicant: Syed Aon Mujtaba ,  Thaddeus John Gabara

Inventor： Syed Aon Mujtaba ,  Thaddeus John Gabara

IPC: H01Q3/26 ,  H04B7/26 ,  H04W16/32 ,  H04W88/08 ,  H04Q7/20 ,  H01Q3/24 ,  H04B1/38

CPC classification number: H04W16/32

Abstract: A control technique for a communication system in which a microcell base station is co-located with a macrocell base station. The microcell base station tracks hot spots as they move within the macrocell. The microcell base station may utilize a two-dimensional (2-D) antenna array, which is co-located with the macro cell antenna. The two-dimensional antenna is steerable in both the horizontal and vertical directions. The size of the microcell coverage area depends upon the distance from the cell site antenna as well as the dimensionality of the array, which determines the angular spread of the beam. Filter tap weights may be adjusted to point the beam to any desired location in the macrocell. The orthogonality between the macrocell and the microcell may be obtained either in the frequency domain or in the code domain, depending upon the system in which it is implemented.

Abstract translation: 一种用于其中微小区基站与宏小区基站共同定位的通信系统的控制技术。 微小区基站在宏小区内移动时跟踪热点。 微小区基站可以利用与宏小区天线共同定位的二维（2-D）天线阵列。 二维天线在水平和垂直两个方向都是可操纵的。 微小区覆盖区域的大小取决于距离小区站点天线的距离以及阵列的维数，这决定了射束的角度扩展。 可以调整滤波器抽头权重以将波束指向宏单元中的任何所需位置。 宏单元和微小区之间的正交性可以在频域或代码域中获得，这取决于其实现的系统。

公开(公告)号：US06542485B1

公开(公告)日：2003-04-01

申请号：US09200522

申请日：1998-11-25

Applicant: Syed Aon Mujtaba

Inventor： Syed Aon Mujtaba

IPC: H04B7216

CPC classification number: H04B7/26 ,  H04L5/023 ,  H04L5/143

Abstract: Methods and apparatus for wireless communication in systems such as omni-beam and narrow-beam fixed wireless loop (FWL) systems. In a first technique in accordance with the invention, referred to as code division duplex (CDD) time-slotted CDMA, uplink and downlink portions of the system are separated using code division duplexing, while the users within a given cell are also separated using codes, e.g., using time-slotted CDMA. In a second technique in accordance with the invention, referred to as time division duplex (TDD) time-slotted CDMA, uplink and downlink portions of the system are separated using time division duplexing, e.g., time slots, while the users in a given cell are separated using codes, e.g., time-slotted CDMA. Both the CDD and TDD techniques may make use of an electronically-steered beam which is designed to provide simultaneous coverage within a given cell for two or more users separated by codes. In a third technique in accordance with the invention, referred to as orthogonal frequency division multiplexing (OFDM), uplink and downlink portions of the system are separated in frequency, while the users are, e.g., also separated in frequency.

Abstract translation: 全方位和窄波束固定无线环路（FWL）系统中无线通信的方法和装置。 在根据本发明的第一技术中，被称为码分双工（CDD）时隙的CDMA，系统的上行链路和下行链路部分使用码分双工分离，而给定小区内的用户也使用代码分离 ，例如使用时隙CDMA。 在根据本发明的第二种技术中，称为时分双工（TDD）时隙CDMA，系统的上行链路和下行链路部分使用时分双工（例如时隙）分离，而给定小区中的用户 使用代码分离，例如时隙CDMA。 CDD和TDD技术都可以利用电子控制的光束，其被设计为在由代码分隔的两个或多个用户的同一个小区内提供同时的覆盖。 在根据本发明的被称为正交频分复用（OFDM）的第三技术中，系统的上行链路和下行链路部分在频率上分离，而用户例如也在频率上分离。

公开(公告)号：US06515533B1

公开(公告)日：2003-02-04

申请号：US09162852

申请日：1998-09-29

Applicant: Thaddeus John Gabara ,  Syed Aon Mujtaba

Inventor： Thaddeus John Gabara ,  Syed Aon Mujtaba

IPC: H03K1762

CPC classification number: H03K5/24

Abstract: A multi-input comparator in accordance with the invention determines a minimum or maximum signal value in a given set of signal values. An illustrative embodiment of the multi-input comparator includes N inputs and generates an output corresponding to the maximum or minimum value in a set of signal values applied to the N inputs. The comparator includes a first comparison circuit, such as a sense amplifier, having inputs for receiving a subset of the N signal values, such as a pair of the inputs. The comparator also includes a first multiplexer having a select signal input coupled to an output of the first comparison circuit, and inputs coupled to the subset of the N signal values. The comparator further includes N-2 additional comparison circuits and N-2 additional multiplexers, with the N-2 additional multiplexers coupled to corresponding ones of the N-2 additional comparison circuits. The comparison circuits and multiplexers are arranged to select a particular one of the N signal values, e.g., the maximum or the minimum value. The additional comparison circuits and multiplexers may be arranged in, for example, a linear architecture or a logarithmic architecture. The comparator may be used in conjunction with a position determination circuit which indicates the position of the maximum or minimum value in the set of signal values, or produces a desired ordering of the signal values.

Abstract translation: 根据本发明的多输入比较器确定给定的一组信号值中的最小或最大信号值。 多输入比较器的说明性实施例包括N个输入并且产生对应于施加到N个输入的一组信号值中的最大值或最小值的输出。 比较器包括具有用于接收N个信号值的子集的输入的诸如读出放大器的第一比较电路，例如一对输入。 比较器还包括具有耦合到第一比较电路的输出的选择信号输入以及耦合到N个信号值的子集的输入的第一多路复用器。 比较器还包括N-2个附加比较电路和N-2个附加多路复用器，其中N-2个附加多路复用器耦合到N-2个附加比较电路中的相应的。 比较电路和多路复用器被设置为选择N个信号值中的特定一个，例如最大值或最小值。 附加的比较电路和多路复用器可以被布置在例如线性架构或对数架构中。 比较器可以与指示信号值集合中的最大值或最小值的位置的位置确定电路一起使用，或产生信号值的期望顺序。

公开(公告)号：US06477680B2

公开(公告)日：2002-11-05

申请号：US09105759

申请日：1998-06-26

Applicant: Syed Aon Mujtaba

Inventor： Syed Aon Mujtaba

IPC: H03M1341

CPC classification number: H03M13/6563 ,  H03M13/3961 ,  H03M13/4107 ,  H03M13/4169 ,  H03M13/6577

Abstract: A convolutional decoder for decoding received symbols in a communication system includes a branch metric calculator, and add-compare-select engine and a traceback unit. The branch metric calculator computes branch metrics for transitions in a trellis representative of a convolutional code used to generate the symbols. In accordance with the invention, the branch metrics are computed from an offset binary representation of the symbols using an inverse likelihood function, such that the resulting path metrics grow at a smaller rate and therefore require less memory. The add-compare-select engine processes path metrics generated from the branch metrics so as to determine a selected path through at least a portion of the trellis, and may utilize a state-serial architecture which computes path metrics for k states of a given stage of the trellis per clock cycle, using branch metrics obtained from k sets of registers in the branch metric calculator. The traceback unit generates a sequence of decoded bits from the selected path, and may be configured to include a staging register and a traceback memory. The staging register receives selected path information from the add-compare-select engine, and the contents of the staging register for a given stage of the trellis are loaded into the traceback memory when the staging register becomes full, at a location given by a number of the stage modulo a predetermined traceback length.

Abstract translation: 用于对通信系统中的接收符号进行解码的卷积解码器包括分支度量计算器和加法比较选择引擎和追溯单元。 分支度量计算器计算用于代表用于生成符号的卷积码的网格中的转变的分支度量。 根据本发明，使用逆似然函数从符号的偏移二进制表示中计算分支度量，使得所得到的路径度量以较小的速率增长，因此需要更少的存储器。 加法比选择引擎处理从分支度量产生的路径度量，以便确定通过网格的至少一部分的所选路径，并且可以利用状态 - 串行体系结构，其计算给定阶段的k个状态的路径度量 的每个时钟周期的网格，使用从分支度量计算器中的k组寄存器获得的分支度量。 回溯单元从所选择的路径生成解码比特序列，并且可以被配置为包括分段寄存器和回溯存储器。 分级寄存器从加法比较选择引擎接收所选择的路径信息，并且当分段寄存器变满时，在给定阶段的格架上的分段寄存器的内容被加载到追溯存储器中， 的阶段模数预定的追溯长度。

公开(公告)号：US06249192B1

公开(公告)日：2001-06-19

申请号：US09311589

申请日：1999-05-14

Applicant: Thaddeus John Gabara ,  Syed Aon Mujtaba

Inventor： Thaddeus John Gabara ,  Syed Aon Mujtaba

IPC: H03B512

CPC classification number: H03L7/0805 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1271 ,  H03K3/354 ,  H03L7/06 ,  H03L7/24 ,  H04L7/027 ,  H04L7/033

Abstract: A tuning signal is injected into an LC tank circuit oscillator, e.g., through an impedance (either reactive, inductive, capacitive and/or resistive) to tune the phase and/or frequency of the LC tank circuit oscillator. A negative resistance is included in parallel with the LC tank circuit oscillator to compensate for losses in the LC tank circuit, and a bias signal is provided to power the operation of the LC tank circuit. The tuning signal may be, e.g., an AC signal or a data signal. The tuning signal is injected into the LC tank circuit using capacitors, resistors, FET or bipolar transistors, and/or inductors. Multiple LC tank circuit oscillators may be used to provide stable multiplied or divided frequencies. In this case, the output of one LC tank circuit oscillator may be used to tune another LC tank circuit oscillator. In another embodiment, the nominal frequency of the LC tank circuit oscillator may be adjusted using a varactor or other voltage-controlled element in the LC tank circuit oscillator under the control of, e.g., the output of a separate PLL loop including another LC tank circuit oscillator. In one application, the injection tuned LC tank circuit forms a clock recovery cell using a clock signal embedded in a NRZ (Non Return to Zero) pseudo-random data stream. The slave oscillator in turn generates a recovered clock signal. Differential clock recovery can be performed with as little as four active devices.

Abstract translation: 调谐信号例如通过阻抗（无功，电感，电容和/或电阻）被注入LC振荡电路振荡器，以调谐LC振荡电路振荡器的相位和/或频率。 LC电路振荡器并联包含负电阻，以补偿LC电路中的损耗，并提供偏置信号为LC电路的运行提供动力。 调谐信号可以是例如AC信号或数据信号。 使用电容器，电阻器，FET或双极晶体管和/或电感器将调谐信号注入LC谐振电路。 多个LC振荡电路振荡器可用于提供稳定的倍频或分频。 在这种情况下，一个LC振荡电路振荡器的输出可用于调谐另一个LC振荡电路振荡器。 在另一个实施例中，LC振荡电路振荡器的标称频率可以在LC振荡电路振荡器中使用变容二极管或其他电压控制元件进行调节，例如在包括另一个LC振荡电路的单独的PLL回路的输出 振荡器 在一个应用中，注入调谐的LC槽电路使用嵌入在NRZ（非归零）伪随机数据流中的时钟信号形成时钟恢复单元。 从振荡器又产生恢复的时钟信号。 差分时钟恢复可以用少至四个有源器件来执行。

公开(公告)号：US6091781A

公开(公告)日：2000-07-18

申请号：US970987

申请日：1997-11-14

Applicant: Syed Aon Mujtaba

Inventor： Syed Aon Mujtaba

IPC: H04L27/34 ,  H04B1/04 ,  H04L27/02 ,  H04L27/18

CPC classification number: H04L27/02

Abstract: Methods, apparatus and system for transmitting signals in QPSK, QAM and other similar modulation formats as single sideband (SSB) signals. An exemplary SSB-QPSK transmitter receives an in-phase data signal and a quadrature-phase data signal. The in-phase data signal and a Hilbert transform of the quadrature-phase data signal are modulated onto a cosine carrier signal, the quadrature-phase data signal and a Hilbert transform of the in-phase data signal are modulated onto a sine carrier signal, and the modulated sine and cosine carrier signals are combined to provide a modulated SSB-QPSK signal. The in-phase and quadrature-phase data signals are time-aligned signals which are interpolated prior to modulation so as to include zero values at alternating instants of time. Their corresponding Hilbert transforms therefore also exhibit alternating zero values. During modulation, the in-phase data signal can thus be interleaved with Hilbert transforms of the quadrature-phase data signal, and the quadrature-phase data signal can be interleaved with Hilbert transforms of the in-phase data signal, without any interference between the signals. Coherent quadrature detection may be used to recover both the in-phase and quadrature-phase data signals at a receiver.

Abstract translation: 用于以QPSK，QAM和其他类似调制格式发送信号的方法，装置和系统，如单边带（SSB）信号。 示例性SSB-QPSK发射机接收同相数据信号和正交相位数据信号。 同相数据信号和正交相位数据信号的希尔伯特变换被调制到余弦载波信号上，同相数据信号的正交相位数据信号和希尔伯特变换被调制到正弦载波信号上， 并且调制的正弦和余弦载波信号被组合以提供调制的SSB-QPSK信号。 同相和正交相数据信号是在调制之前内插的时间对齐信号，以便在交替时刻包括零值。 因此，它们相应的希尔伯特变换也表现出交替的零值。 在调制期间，同相数据信号因此可以与正交相数据信号的希尔伯特变换进行交织，并且正交相数据信号可以与同相数据信号的希尔伯特变换交错， 信号。 可以使用相干正交检测来在接收机处恢复同相和正交相数据信号。

公开(公告)号：US08964522B2

公开(公告)日：2015-02-24

申请号：US11572450

申请日：2005-09-09

Applicant: Syed Aon Mujtaba ,  Xiaowen Wang

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang

IPC: H04W48/08 ,  H04B7/06 ,  H04B7/10 ,  H04L5/02 ,  H04L27/26 ,  H04W48/16 ,  H04W84/12

CPC classification number: H04B7/0669 ,  H04B7/0684 ,  H04B7/10 ,  H04L5/023 ,  H04L27/2602 ,  H04W48/08 ,  H04W48/16 ,  H04W84/12

Abstract: Methods and apparatus are provided for communicating pseudo-orthogonal pilot tones in a multiple antenna communication system. Data is transmitted in a multiple antenna communication system having N transmit antennas by generating a number of pilot tones for each of the N transmit antennas, wherein the pilot tones for each of the N transmit antennas are pseudo-orthogonal with each other; and transmitting the data on each of the N transmit antennas. The pilot tones are generally embedded in the data. Data is received in a multiple antenna communication system having N transmit antennas by receiving the data on each of the N transmit antennas, wherein the data includes a number of pilot tones for each of the N transmit antennas, wherein the pilot tones for each of the N transmit antennas are pseudo-orthogonal with each other. The pilot tones can be orthogonal in the frequency domain, time domain, spatial domain, or all of them.

Abstract translation: 提供了用于在多天线通信系统中传送伪正交导频音调的方法和装置。 通过为N个发送天线中的每一个生成多个导频音，在具有N个发送天线的多天线通信系统中发送数据，其中，N个发射天线中的每一个的导频音调彼此伪正交; 并且在N个发射天线中的每一个上发送数据。 导频音通常嵌入在数据中。 在具有N个发射天线的多天线通信系统中，通过接收N个发射天线中的每一个上的数据来接收数据，其中数据包括用于N个发射天线中的每一个的导频音调，其中， N个发射天线彼此伪正交。 导频音可以在频域，时域，空域或全部正交。