公开(公告)号：US09603097B2

公开(公告)日：2017-03-21

申请号：US12494157

申请日：2009-06-29

Applicant: Supratik Bhattacharjee ,  Brian C. Banister ,  Shivratna G. Srinivasan

Inventor： Supratik Bhattacharjee ,  Brian C. Banister ,  Shivratna G. Srinivasan

IPC: H04W36/06 ,  H04W52/02 ,  H04W68/00 ,  H04W76/04

CPC classification number: H04W52/028 ,  H04W68/00 ,  H04W76/28 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/24

Abstract: An apparatus and method for processing signals are disclosed. The apparatus may include a transceiver configured to receive a first paging signal during a first cycle, a memory, and a processor configured to store the received first paging signal in the memory, to switch the transceiver to an off state after the first paging signal is stored in the memory, to process the stored first paging signal while the transceiver is in the off state, and to determine whether to enter an online mode based on the processing.

公开(公告)号：US20130155883A1

公开(公告)日：2013-06-20

申请号：US13610652

申请日：2012-09-11

Applicant: Supratik Bhattacharjee ,  Shivratna G. Srinivasan ,  Brian C. Banister ,  Hisham Mahmoud

Inventor： Supratik Bhattacharjee ,  Shivratna G. Srinivasan ,  Brian C. Banister ,  Hisham Mahmoud

IPC: H04W48/16 ,  H04J3/00 ,  H04W24/00

CPC classification number: H04W48/16

Abstract: Techniques for performing a frequency scan to detect wireless systems operating on frequency channels with variable bandwidths are disclosed. In one aspect, a user equipment (UE) performs a frequency scan for a plurality of frequency channels and measures the received power of each frequency channel based on a center frequency and a bandwidth of the frequency channel. The UE identifies candidate frequency channels for acquisition based on the results of the frequency scan. In another aspect, a frequency scan of a band is performed by partitioning the band into multiple segments, measuring received powers of subcarriers or raster frequencies within each segment, and concatenating received powers of subcarriers or raster frequencies for all segments. A frequency scan is then performed based on the concatenated results for the multiple segments.

Abstract translation: 公开了用于执行频率扫描以检测在具有可变带宽的频道上操作的无线系统的技术。 一方面，用户设备（UE）对多个频道执行频率扫描，并且基于频率信道的中心频率和带宽测量每个频道的接收功率。 基于频率扫描的结果，UE识别用于获取的候选频道。 在另一方面，通过将频带划分成多个段，测量每个段内的子载波的接收功率或光栅频率，以及连接所有段的子载波或光栅频率的接收功率来执行频带的频率扫描。 然后基于多个段的级联结果执行频率扫描。

公开(公告)号：US08284875B2

公开(公告)日：2012-10-09

申请号：US12688760

申请日：2010-01-15

Applicant: Jong Hyeon Park ,  Michael L. McCloud ,  Brian C. Banister

Inventor： Jong Hyeon Park ,  Michael L. McCloud ,  Brian C. Banister

IPC: H04L27/06

CPC classification number: H04L25/03159 ,  H04L25/0246 ,  H04L25/03292 ,  H04L25/03299 ,  H04L27/2647 ,  H04L2025/03426 ,  H04W52/42

Abstract: Certain embodiments of the present disclosure provide a method for frequency-domain gain control in system utilizing orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO). The proposed method reduces the complexity of the system while maximizing the internal accuracy of the OFDM MIMO decoder and preserving the performance of the system.

Abstract translation: 本公开的某些实施例提供了一种利用正交频分复用（OFDM）多输入多输出（MIMO）的系统中的频域增益控制的方法。 所提出的方法降低了系统的复杂性，同时最大化了OFDM MIMO解码器的内部精度并保持了系统的性能。

公开(公告)号：US08243864B2

公开(公告)日：2012-08-14

申请号：US10994012

申请日：2004-11-19

Applicant: Steven Ciccarelli ,  Arun Raghupathy ,  Brian C. Banister

Inventor： Steven Ciccarelli ,  Arun Raghupathy ,  Brian C. Banister

IPC: H04B1/10

CPC classification number: H03H17/0009 ,  H03G3/3052 ,  H04B1/1036 ,  H04B1/707

Abstract: A technique for noise reduction in a wireless communication system uses controllable bandwidth filters (120) to filter a received signal. In a typical implementation, the filters (120) are used at baseband frequencies. A measurement (RSSI) is indicative of the strength of the received signal. A control circuit (144) generates a control signal (146) to control the bandwidth of the filters (120). If the received signal strength is above a first threshold, a wider bandwidth may be used for the filters (120). If the received signal is below a second threshold, the control circuit (144) generates the control signal (146) to set the filters (120) to a more narrow bandwidth. The system (100) may also be used with digital filters (150, 152) following digitization by analog to digital converters (ADCs) (130, 132). The system (100) is particularly well-suited for operation with noise-shaped ADCs (130, 132), such as Delta-Sigma converters.

Abstract translation: 用于无线通信系统中降噪的技术使用可控带宽滤波器（120）来对接收到的信号进行滤波。 在典型的实现中，滤波器（120）用于基带频率。 测量（RSSI）表示接收信号的强度。 控制电路（144）产生控制信号（146）以控制滤波器（120）的带宽。 如果接收信号强度高于第一阈值，则可以对滤波器（120）使用更宽的带宽。 如果接收信号低于第二阈值，则控制电路（144）产生控制信号（146）以将滤波器（120）设置为更窄的带宽。 在数模转换器（ADC）（130,132）之后，系统（100）也可以与数字滤波器（150,152）一起使用。 系统（100）特别适用于具有噪声形状的ADC（130,132）（诸如Δ-Σ转换器）的操作。

公开(公告)号：US20110051831A1

公开(公告)日：2011-03-03

申请号：US12552673

申请日：2009-09-02

Applicant: Parvathanathan Subrahmanya ,  Andrew Sendonaris ,  Jia Tang ,  Atul A. Salvekar ,  Shantanu Khare ,  Jong Hyeon Park ,  Brian C. Banister ,  Tao Cui

Inventor： Parvathanathan Subrahmanya ,  Andrew Sendonaris ,  Jia Tang ,  Atul A. Salvekar ,  Shantanu Khare ,  Jong Hyeon Park ,  Brian C. Banister ,  Tao Cui

IPC: H04L5/12 ,  H03M13/45 ,  G06F11/10

CPC classification number: H04L1/06 ,  H04L1/005 ,  H04L1/0051 ,  H04L25/03171

Abstract: Certain aspects of the present disclosure relate to a method and an apparatus for unified iterative demodulation-decoding that can be employed in both multiple-input multiple-output (MIMO) and non-MIMO wireless systems.

Abstract translation: 本公开的某些方面涉及可以在多输入多输出（MIMO）和非MIMO无线系统中使用的用于统一迭代解调 - 解码的方法和装置。

公开(公告)号：US20100250636A1

公开(公告)日：2010-09-30

申请号：US12732135

申请日：2010-03-25

Applicant: Brian C. Banister ,  Surendra Boppana

Inventor： Brian C. Banister ,  Surendra Boppana

IPC: G06F7/60 ,  G06F17/14

CPC classification number: G06F17/142 ,  H04L27/2628 ,  H04L27/265

Abstract: Disclosed are apparatus and methods for dynamic data-based scaling of data. The disclosed methods and apparatus involve storing one or more input data samples, which are to be scaled and input to a processing function such as a Fast Fourier Transform. A scaling value operable for scaling the one or more data samples is determined based on the one or more input data samples, and then the stored data samples are scaled based on the computed scaling value when read out of storage prior to the processing function. The scaling of data based on the input data allows the data to be scaled dynamically, not statically, and ensures that the data fits within a desired bit width constraint of the processing function thereby economizing processing resources.

Abstract translation: 公开了用于基于动态数据的数据缩放的装置和方法。 所公开的方法和装置包括存储要被缩放和输入到诸如快速傅里叶变换的处理功能的一个或多个输入数据样本。 基于一个或多个输入数据样本来确定可操作用于缩放一个或多个数据样本的缩放值，然后当在处理功能之前读出存储器时，基于所计算的缩放值对存储的数据样本进行缩放。 基于输入数据的数据缩放允许动态地而不是静态地缩放数据，并确保数据符合处理功能的期望的位宽度约束，从而节省处理资源。

公开(公告)号：US07180956B1

公开(公告)日：2007-02-20

申请号：US10076925

申请日：2002-02-14

Applicant: Brian C. Banister

Inventor： Brian C. Banister

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04B7/0641 ,  H04B7/0634 ,  H04L1/0026 ,  Y02D70/144 ,  Y02D70/444

Abstract: A novel method and apparatus for applying overlaid perturbation vectors for gradient feedback transmit antenna array adaptation is disclosed. The method and apparatus of the present invention allows a communication system to reduce transmit power that is associated with dedicated pilot signals by overlaying perturbation vectors and measuring channel estimates and demodulation channel estimates during a measurement time interval that comprises a plurality of feedback time intervals. The present inventive method utilizes channel estimates that include the effects of previous perturbation vectors, subsequent feedback vectors and intermediate feedback decisions. The inventive method extracts a coarse gradient estimate by utilizing a continuous summation of overlaid weight vector perturbation vectors and updates the weighting vector accordingly.

Abstract translation: 公开了一种用于对梯度反馈发射天线阵列适配应用覆盖扰动矢量的新颖方法和装置。 本发明的方法和装置允许通信系统通过覆盖扰动向量来减少与专用导频信号相关联的发射功率，并且在包括多个反馈时间间隔的测量时间间隔期间测量信道估计和解调信道估计。 本发明的方法利用包括先前扰动矢量，后续反馈矢量和中间反馈决策的影响的信道估计。 本发明方法通过利用覆盖权重向量扰动向量的连续求和提取粗略梯度估计，并相应地更新加权向量。

公开(公告)号：US06169752A

公开(公告)日：2001-01-02

申请号：US09031078

申请日：1998-02-26

Applicant: Brian C. Banister

Inventor： Brian C. Banister

IPC: H04J307

CPC classification number: H04W36/02 ,  H04W52/38 ,  H04W88/02

Abstract: A method and system for preventing information losses during alternative frequency searches by a receiving unit in a communication system in which data is channel coded, interleaved, and segmented into a plurality of frames. The method comprises the steps of discontinuing demodulation at a predetermined time before a frame ends, inserting zero values into the frame, and performing a search for alternative frequencies while continuing to insert zero values into the frame and then a next frame. After the search is completed, insertion of zero values is discontinued and demodulation is resumed. In one preferred version, the receiving unit comprises a mobile radio station operating at a serving frequency. The step of inserting zero values is followed by a step of programming the mobile radio station to a search frequency and waiting for the mobile radio station to settle. The step of discontinuing insertion of zero values is preceded by a step of programming the mobile radio station to the serving frequency and waiting for the mobile radio station to settle.

Abstract translation: 一种在数据被信道编码，交织和分段成多个帧的通信系统中由接收单元在替代频率搜索期间防止信息丢失的方法和系统。 该方法包括以下步骤：在帧结束之前的预定时间停止解调，将零值插入到帧中，并且在继续将零值插入到帧中然后再下一帧的同时执行替代频率的搜索。 搜索完成后，中断插入零值，并恢复解调。 在一个优选版本中，接收单元包括以服务频率工作的移动无线电台。 插入零值的步骤之后是将移动无线电台编程到搜索频率并等待移动无线电台定居的步骤。 停止插入零值的步骤之前是将移动无线电台编程到服务频率并等待移动无线电台定居的步骤。

公开(公告)号：US09071493B2

公开(公告)日：2015-06-30

申请号：US12824958

申请日：2010-06-28

Applicant: Brian C. Banister ,  Shivratna G. Srinivasan ,  Matthias Brehler ,  Sunil Kumar Kandukuri Narayana ,  Raghu N. Challa

Inventor： Brian C. Banister ,  Shivratna G. Srinivasan ,  Matthias Brehler ,  Sunil Kumar Kandukuri Narayana ,  Raghu N. Challa

IPC: H03D3/24 ,  H04L27/26 ,  H03J1/00 ,  H04L27/00

CPC classification number: H04L27/2657 ,  H03J1/005 ,  H04L2027/0055 ,  H04L2027/0065 ,  H04L2027/0067

Abstract: Methods and apparatus for correcting frequency errors between a carrier frequency of a signal received by a wireless device and a reference frequency local to the device. For certain aspects, such a method generally includes receiving a signal in a receiver having an LO producing a reference frequency, a radio frequency (RF) phase-locked loop (PLL), and a digital rotator, estimating a frequency difference between a carrier frequency of the received signal and the LO reference frequency, and applying the estimated frequency difference to the RF PLL and the digital rotator.

Abstract translation: 用于校正由无线设备接收的信号的载波频率与设备本地的参考频率之间的频率误差的方法和装置。 对于某些方面，这种方法通常包括在具有产生参考频率的LO的接收机中接收信号，射频（RF）锁相环（PLL）和数字旋转器，估计载波频率 的接收信号和LO参考频率，并将估计的频差应用于RF PLL和数字旋转器。

公开(公告)号：US08923424B2

公开(公告)日：2014-12-30

申请号：US12711128

申请日：2010-02-23

Applicant: Michael L. McCloud ,  Matthias Brehler ,  Ju Won Park ,  Jong Hyeon Park ,  Je Woo Kim ,  Inyup Kang ,  Brian C. Banister

Inventor： Michael L. McCloud ,  Matthias Brehler ,  Ju Won Park ,  Jong Hyeon Park ,  Je Woo Kim ,  Inyup Kang ,  Brian C. Banister

IPC: H04B7/02 ,  H04L25/03 ,  H04B7/04

CPC classification number: H04L25/03229 ,  H04B7/0413 ,  H04L25/03242 ,  H04L25/03318 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.

Abstract translation: 本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。 作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。 在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。 在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。 根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。 这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。