公开(公告)号：US08837525B2

公开(公告)日：2014-09-16

申请号：US13052691

申请日：2011-03-21

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04J1/00 ,  H04L25/03 ,  H04L27/26 ,  H04L5/14 ,  H04B7/02 ,  H04L5/00 ,  H04W48/08 ,  H04W24/00 ,  H04L25/02 ,  H04B7/06

CPC classification number: H04L25/03955 ,  H04B7/024 ,  H04B7/0626 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/14 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03904 ,  H04L27/2646 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2695 ,  H04W24/00 ,  H04W48/08

Abstract: Methods and apparatus are described that provide carrier-phase difference (CPD) acquisition via signaling protocols between communicating devices. The random CPD between two disjoint devices can be measured by the signaling protocols described herein. With the availability of the CPD, a device is also able to acquire its outgoing channel (transmit channel) information, thus avoiding the channel information feedback that is being considered and/or practiced in some wireless communications systems. Also described are methods and apparatus that use the CPD to synchronize the clocks of two or more devices and that track the time-variations of the CPD for reliable CPD measurement and tracking loop operations. Applications of the described methods and apparatus include wireless multipoint broadcast systems, also known as coordinated multipoint transmission, or CoMP, in LTE (long-term evolution)-advanced systems, point-to-point wireless MIMO systems, and general wireless device networks.

Abstract translation: 描述了通过通信设备之间的信令协议来提供载波相位差（CPD）采集的方法和装置。 可以通过本文描述的信令协议来测量两个不相交设备之间的随机CPD。 随着CPD的可用性，设备还能够获取其输出信道（发送信道）信息，从而避免在某些无线通信系统中正在考虑和/或实践的信道信息反馈。 还描述了使用CPD来同步两个或更多个设备的时钟并跟踪CPD的时间变化以用于可靠的CPD测量和跟踪循环操作的方法和装置。 所描述的方法和装置的应用包括在LTE（长期演进） - 高级系统，点对点无线MIMO系统和一般无线设备网络中的无线多点广播系统，也称为协调多点传输，或CoMP。

公开(公告)号：US08478203B2

公开(公告)日：2013-07-02

申请号：US13194992

申请日：2011-07-31

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04B17/00

CPC classification number: H04L25/02 ,  H04B7/0452 ,  H04B7/0626 ,  H04L1/0693 ,  H04L25/0204 ,  H04L27/2655 ,  H04L27/2657 ,  H04L27/2695 ,  H04W56/00

Abstract: Multipoint broadcasting requires the base stations to be phase-synchronized. Methods and apparatus are described that provide phase synchronization of base stations with the downlink-channel phase feedback by mobile users. Also described are methods and apparatus that make phase synchronization of base stations independent of multipoint-broadcast sessions, thus reducing the synchronization overhead and improving network capacity. The methods and apparatus utilize model-based downlink-channel phase feedback that reduces most of the feedback overhead. Applications of the described methods and apparatus include wireless multipoint broadcast systems, also known as coordinated multipoint transmission, or CoMP, in LTE-A (long-term evolution, advanced) systems, and frequency and phase synchronization of a cluster of base stations, or more generally, of a cluster of wireless devices.

Abstract translation: 多点广播需要基站进行相位同步。 描述了提供移动用户的基站与下行链路信道相位反馈的相位同步的方法和装置。 还描述了使得独立于多点广播会话的基站的相位同步的方法和装置，从而减少了同步开销并提高了网络容量。 该方法和装置利用基于模型的下行链路信道相位反馈，其减少大部分的反馈开销。 所描述的方法和装置的应用包括LTE-A（长期演进，高级）系统中的无线多点广播系统，也称为协调多点传输或CoMP，以及基站集群的频率和相位同步，或 更一般地，是一组无线设备。

公开(公告)号：US20130121379A1

公开(公告)日：2013-05-16

申请号：US13293813

申请日：2011-11-10

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L27/02 ,  H04B1/7097

CPC classification number: H04L27/2613 ,  H04L5/0016 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0224 ,  H04L2025/03426

Abstract: Large-dimension MIMO and multipoint broadcasting in new generation of wireless networks create high demand for various types of pilots in transmission signals for channel estimation, data demodulation, synchronization, etc. More pilots, as in existing networks, use more resources and thus diminish the network capacity. Methods and apparatus of heterogeneous pilots are disclosed. A heterogeneous pilot has its own signal characteristics that are different from the primary information-bearing signals in the network. Heterogeneous pilots can be spread-spectrum signals in an OFDM-based wireless network. Heterogeneous pilots use no network resources, and can be as many as desired, and can be designed to have versatile utilities. Also described are methods and apparatus of heterogeneous pilot cancellation that minimizes the interference of heterogeneous pilots on the primary information-bearing signals. Applications of the described methods and apparatus include OFDM-based wireless cellular networks, such as LTE-advanced and Wireless LAN.

Abstract translation: 新一代无线网络中的大尺寸MIMO和多点广播对于信道估计，数据解调，同步等传输信号中的各种类型的导频产生了高需求。如现有网络中更多的飞行员使用更多的资源，从而减少 网络容量。 披露了异质飞行员的方法和装置。 异构导频具有与网络中的主要信息承载信号不同的信号特征。 异构导频可以是基于OFDM的无线网络中的扩频信号。 异构飞行员不使用网络资源，并且可以根据需要而设计，并且可以被设计为具有通用的实用程序。 还描述了使异构导频对主要信息承载信号的干扰最小化的异构导频消除的方法和装置。 所描述的方法和装置的应用包括基于OFDM的无线蜂窝网络，诸如LTE高级和无线LAN。

公开(公告)号：US08379692B2

公开(公告)日：2013-02-19

申请号：US10289699

申请日：2002-11-07

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04B1/00

CPC classification number: H04B1/7115 ,  H04B1/7117 ,  H04B2201/70701

Abstract: A method and apparatus are disclosed for detecting a pilot signal in a wireless receiver using coherent combining/noncoherent detection techniques. Coherent combining/noncoherent detection techniques are used to detect the pilot signal whenever the receiver is already frequency locked, or otherwise known to have a small frequency offset Conventional noncoherent combining/noncoherent detection techniques are utilized to initially acquire the timing of the forward channel. Once the receiver is frequency locked, coherent combining/noncoherent detection techniques may be used to continuously detect the pilot signals. After the receiver is frequency locked, the residue frequency error is small over several consecutive correlator outputs The correlator outputs can thus be combined coherently (since the frequency error is known to be small), and the phase dependency is then eliminated by noncoherent detection.

Abstract translation: 公开了一种用于使用相干组合/非相干检测技术在无线接收机中检测导频信号的方法和装置。 只要接收器已经被锁定，或者以其他方式已知具有小的频率偏移，则使用相干组合/非相干检测技术来检测导频信号。传统的非相干组合/非相干检测技术被用于初始获取前向信道的定时。 一旦接收机被锁频，可以使用相干组合/非相干检测技术来连续地检测导频信号。 在接收机频率锁定之后，剩余频率误差在几个连续的相关器输出上是小的。因此，相关器输出可以相干地组合（因为已知频率误差很小），然后通过非相干检测消除相位依赖性。

公开(公告)号：US08261175B2

公开(公告)日：2012-09-04

申请号：US12271553

申请日：2008-11-14

Applicant: Xiao-an Wang ,  Jens Berkmann

Inventor： Xiao-an Wang ,  Jens Berkmann

IPC: G06F11/10 ,  H03M13/00

CPC classification number: H03M13/091

Abstract: A description is given of an apparatus that includes a division unit configured to receive a data stream and to divide the received data stream into a plurality of data segments and a plurality of first CRC check units, wherein each of the first CRC units is configured to perform a CRC check of a respective one of the plurality of segments of data, and wherein the plurality of CRC checks are performed concurrently.

Abstract translation: 给出了一种包括分配单元的设备的描述，该分割单元被配置为接收数据流并将接收的数据流划分为多个数据段和多个第一CRC校验单元，其中每个第一CRC单元被配置为 执行所述多个数据段中的相应一个的CRC校验，并且其中所述多个CRC校验同时执行。

公开(公告)号：US20080102774A1

公开(公告)日：2008-05-01

申请号：US11553635

申请日：2006-10-27

Applicant: Roger A. Fratti ,  Xiao-an Wang

Inventor： Roger A. Fratti ,  Xiao-an Wang

IPC: H04B7/00 ,  H04B1/06

CPC classification number: H03G3/3068

Abstract: An apparatus including automatic gain control (AGC) includes at least one variable gain amplifier (VGA) operative to receive an input signal and to generate an amplified signal. A gain of the VGA is controlled as a function of at least a first control signal. The apparatus further includes an AGC circuit coupled to the VGA and being operative to generate the first control signal. The AGC circuit has a bandwidth that is controlled as a function of at least the amplified signal and a second control signal, the second control signal being indicative of a motion of the apparatus.

Abstract translation: 包括自动增益控制（AGC）的装置包括至少一个可操作以接收输入信号并产生放大信号的可变增益放大器（VGA）。 VGA的增益被控制为至少第一控制信号的函数。 该装置还包括耦合到VGA并可操作以产生第一控制信号的AGC电路。 所述AGC电路具有作为至少所述放大信号和第二控制信号的功能的带宽，所述第二控制信号表示所述装置的运动。

公开(公告)号：US6127860A

公开(公告)日：2000-10-03

申请号：US971430

申请日：1997-11-17

Applicant: David G. Martin ,  Xiao-an Wang

Inventor： David G. Martin ,  Xiao-an Wang

IPC: G06F1/035 ,  H03B21/00

CPC classification number: G06F1/0356 ,  G06F2101/04

Abstract: An apparatus and method for generating a sine wave signal for a desired phase input. The sine wave signal is generated by implementing a linear expansion of the sine function. An incoming phase value is divided into a base phase value and an incremental phase value. The sine value for each base phase value is stored in a look-up table. The sine values for phase values falling between base phase values are generated using a linear expansion of the sine function.

Abstract translation: 一种用于产生所需相位输入的正弦波信号的装置和方法。 通过实现正弦函数的线性扩展来产生正弦波信号。 输入相位值被分为基相位值和增量相位值。 每个基相位值的正弦值存储在查找表中。 使用正弦函数的线性扩展产生落在基相位值之间的相位值的正弦值。

公开(公告)号：US5954836A

公开(公告)日：1999-09-21

申请号：US7720

申请日：1998-01-15

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H03M13/23 ,  G06F11/10 ,  H03M13/12

CPC classification number: H03M13/23

Abstract: A convolutional encoding apparatus and method for encoding input data with bits stored in a shift register. A predetermined set of coefficient values is provided to define a coefficient mask value. It is then determined whether the bit of the input data is one of a logical zero and a logical one. Only if the bit of the input data is a logical one, the coefficient mask value and the shift register value are combined to produce a next shift register value. Predetermined ones of the bits of the next shift register value are then selected as coded output data.

Abstract translation: 一种用于对存储在移位寄存器中的位对输入数据进行编码的卷积编码装置和方法。 提供预定的系数值集合来定义系数掩模值。 然后确定输入数据的位是否为逻辑0和逻辑1之一。 仅当输入数据的位是逻辑位时，系数掩码值和移位寄存器值被组合才产生下一个移位寄存器值。 然后选择下一个移位寄存器值的预定位的编码输出数据。