公开(公告)号：US20090028256A1

公开(公告)日：2009-01-29

申请号：US11834653

申请日：2007-08-06

Applicant: Durk L. van Veen ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Krishna Kiran Mukkavilli ,  Fuyun Ling

Inventor： Durk L. van Veen ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Krishna Kiran Mukkavilli ,  Fuyun Ling

IPC: H04L27/28

CPC classification number: H04L27/2613 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/008 ,  H04L5/0094 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2628 ,  H04L27/2647 ,  H04L27/2656

Abstract: A new channel is added to FLO networks that carries embedded signaling parameter information. The design is such that regardless of the actual values of the signaling parameters conveyed, a receiver will be able to demodulate this new channel. Moreover, the addition of the new channel does not render a FLO network that has been so configured to not be backwards-compatible with existing devices.

Abstract translation: 一个新的信道被添加到携带嵌入式信令参数信息的FLO网络中。 这种设计使得无论传达的信令参数的实际值如何，接收机将能够解调这个新的信道。 此外，添加新频道并不会使FLO网络被配置为不与现有设备向后兼容。

公开(公告)号：US20080291860A1

公开(公告)日：2008-11-27

申请号：US11751631

申请日：2007-05-21

Applicant: Rajiv Vijayan ,  Aamod Khandekar ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaswamy Murali

Inventor： Rajiv Vijayan ,  Aamod Khandekar ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaswamy Murali

IPC: H04J3/24

CPC classification number: H04W52/0209 ,  H04B7/12 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0083 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/06 ,  H04L25/0224 ,  H04L27/2602 ,  H04N21/2383 ,  H04N21/4382 ,  H04N21/6112 ,  H04W4/06 ,  H04W28/06 ,  H04W72/04 ,  Y02D70/166 ,  Y02D70/168 ,  Y02D70/442

Abstract: Techniques for multiplexing and transmitting multiple data streams are described. Transmission of the multiple data streams occurs in “super-frames”. Each super-frame has a predetermined time duration and is further divided into multiple (e.g., four) frames. Each data block for each data stream is outer encoded to generate a corresponding code block. Each code block is partitioned into multiple subblocks, and each data packet in each code block is inner encoded and modulated to generate modulation symbols for the packet. The multiple subblocks for each code block are transmitted in the multiple frames of the same super-frame, one subblock per frame. Each data stream is allocated a number of transmission units in each super-frame and is assigned specific transmission units to achieve efficient packing. A wireless device can select and receive individual data streams.

Abstract translation: 描述用于复用和传输多个数据流的技术。 多个数据流的传输发生在“超帧”中。 每个超帧具有预定的持续时间并进一步分为多个（例如，四个）帧。 每个数据流的每个数据块被外部编码以生成相应的代码块。 每个码块被划分成多个子块，并且每个码块中的每个数据分组被内部编码和调制以产生分组的调制符号。 每个码块的多个子块在相同超帧的多个帧中传送，每帧一个子块。 每个数据流在每个超帧中被分配多个传输单元，并被分配特定的传输单元以实现有效的打包。 无线设备可以选择和接收各个数据流。

公开(公告)号：US20080220723A1

公开(公告)日：2008-09-11

申请号：US11860505

申请日：2007-09-24

Applicant: Raghuraman Krishnamoorthi ,  Tao Tian ,  Fuyun Ling ,  Yuheng Huang

Inventor： Raghuraman Krishnamoorthi ,  Tao Tian ,  Fuyun Ling ,  Yuheng Huang

IPC: H04B7/00

CPC classification number: H04L27/2675 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/261 ,  H04L27/2655

Abstract: An acquisition module includes a coherent correlator configured to receive a transmission having a pilot signal and correlate the received transmission with a local copy of the pilot signal to produce a first output, a delayed correlator configured to delay the first output and correlate the first output with the delayed first output to produce a second output, and a detector configured to detect the pilot signal in the transmission based on the second output.

Abstract translation: 获取模块包括相干相关器，其被配置为接收具有导频信号的传输并将接收到的传输与导频信号的本地副本相关联以产生第一输出，延迟相关器被配置为延迟第一输出并将第一输出与 延迟的第一输出以产生第二输出;以及检测器，被配置为基于所述第二输出来检测所述传输中的导频信号。

公开(公告)号：US20080186935A1

公开(公告)日：2008-08-07

申请号：US11933264

申请日：2007-10-31

Applicant: Fuyun Ling ,  Murali Ramaswamy ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi

Inventor： Fuyun Ling ,  Murali Ramaswamy ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi

IPC: H04B7/216

CPC classification number: H04L5/003 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0039 ,  H04L5/0041 ,  H04L5/0053 ,  H04L5/0064 ,  H04L5/0094

Abstract: Techniques for multiplexing and transmitting multiple data streams are described. Transmission of the multiple data streams occurs in “super-frames”. Each super-frame has a predetermined time duration and is further divided into multiple (e.g., four) frames. Each data block for each data stream is outer encoded to generate a corresponding code block. Each code block is partitioned into multiple subblocks, and each data packet in each code block is inner encoded and modulated to generate modulation symbols for the packet. The multiple subblocks for each code block are transmitted in the multiple frames of the same super-frame, one subblock per frame. Each data stream is allocated a number of transmission units in each super-frame and is assigned specific transmission units to achieve efficient packing. A wireless device can select and receive individual data streams.

公开(公告)号：US20080159449A1

公开(公告)日：2008-07-03

申请号：US11674632

申请日：2007-02-13

Applicant: Tao Tian ,  Raghuraman Krishnamoorthi ,  Krishna Kiran Mukkavilli ,  Fuyun Ling

Inventor： Tao Tian ,  Raghuraman Krishnamoorthi ,  Krishna Kiran Mukkavilli ,  Fuyun Ling

IPC: H04L25/08

CPC classification number: H04L27/2657

Abstract: An OFDM telecommunications system includes a transmitter and a receiver. The receiver includes a canceller configured to reduce inter-carrier interference (ICI) in an OFDM symbol in the frequency domain.

Abstract translation: OFDM电信系统包括发射机和接收机。 接收机包括被配置为减少频域中的OFDM符号中的载波间干扰（ICI）的消除器。

公开(公告)号：US20080123540A1

公开(公告)日：2008-05-29

申请号：US11563627

申请日：2006-11-27

Applicant: Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

Inventor： Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

IPC: H04J1/16

CPC classification number: H04B1/1027

Abstract: Methods and apparatus for signal and interference energy estimation in a communication system. In an aspect, a method includes setting a threshold value, and comparing a channel estimate to the threshold value to determine an interference estimate (Iest). The method also includes averaging the interference estimate (Iest) to determine average channel interference (Ic), and determining interference energy (I) based on the interference estimate (Iest) and the average channel interference (Ic). In another aspect, an apparatus includes threshold logic configured to set a threshold value and compare a channel estimate to the threshold value to determine an interference estimate (Iest). The apparatus includes averaging logic configured to average the interference estimate (Iest) to determine average channel interference (Ic), and summing logic configured to determine interference energy (I) based on the interference estimate (Iest) and average channel interference (Ic).

Abstract translation: 通信系统中信号和干扰能量估计的方法和装置。 一方面，一种方法包括设置阈值，以及将信道估计与阈值进行比较，以确定干扰估计（I est）。 该方法还包括对干扰估计进行平均以确定平均信道干扰（I SUB），以及基于干扰估计（I）来确定干扰能量（I） ＆lt; SUB＆gt;）和平均信道干扰（I SUB）。 在另一方面，一种装置包括阈值逻辑，其配置成设置阈值并将信道估计与阈值进行比较以确定干扰估计（I est）。 所述装置包括被配置为平均干扰估计（I＆gt;）以确定平均信道干扰（I SUB）的平均逻辑，以及被配置为确定干扰能量（I） 基于干扰估计（I EST）和平均信道干扰（I SUB）。

公开(公告)号：US20080107217A1

公开(公告)日：2008-05-08

申请号：US11557035

申请日：2006-11-06

Applicant: Bojan Vrcelj ,  Ashok Mantravadi ,  Fuyun Ling ,  Linbo Li ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Vinay Murthy

Inventor： Bojan Vrcelj ,  Ashok Mantravadi ,  Fuyun Ling ,  Linbo Li ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Vinay Murthy

IPC: H04B1/10

CPC classification number: H04L25/03044 ,  H04B1/1036 ,  H04B1/109 ,  H04B15/00 ,  H04B2215/061 ,  H04L2025/03477

Abstract: The disclosure is directed to a receiver. The receiver includes an interference canceller configured to filter digital samples produced from a modulated signal transmitted over a wireless channel, and a digital variable gain amplifier (DVGA) configured to amplify the filtered digital samples.

Abstract translation: 本公开涉及一种接收机。 接收机包括被配置为对通过无线信道传输的调制信号产生的数字样本进行滤波的干扰消除器，以及被配置成放大经滤波的数字样本的数字可变增益放大器（DVGA）。

公开(公告)号：US20070153924A1

公开(公告)日：2007-07-05

申请号：US11516910

申请日：2006-09-06

Applicant: Fuyun Ling ,  Krishna Kiran Mukkavilli ,  Gordon Kent Walker

Inventor： Fuyun Ling ,  Krishna Kiran Mukkavilli ,  Gordon Kent Walker

IPC: H04K1/10

CPC classification number: H04L1/20 ,  H04L27/2602 ,  H04L27/2647

Abstract: Methods and apparatus for noise estimation in a communication system. In an aspect, a method for noise and interference estimation is provided. The method includes identifying one or more unmodulated subcarriers in a received waveform, processing the one or more unmodulated subcarriers to produce a demodulated output, and determining a noise variance based on the demodulated output. In another aspect, an apparatus for providing a noise and interference estimation is provided. The apparatus includes selection logic configured to identify one or more unmodulated subcarriers in a received waveform, a processor configured to demodulate the one or more unmodulated subcarriers to produce a demodulated output, and variance determination logic configured to determine a noise variance based on the demodulated output.

Abstract translation: 通信系统中噪声估计的方法和装置。 在一方面，提供了一种用于噪声和干扰估计的方法。 该方法包括识别接收波形中的一个或多个未调制副载波，处理一个或多个未调制副载波以产生解调输出，以及基于解调输出确定噪声方差。 另一方面，提供了一种用于提供噪声和干扰估计的装置。 所述设备包括被配置为识别接收波形中的一个或多个未调制子载波的选择逻辑，被配置为对所述一个或多个未调制子载波进行解调以产生解调输出的处理器，以及配置为基于解调输出来确定噪声方差的方差确定逻辑 。

公开(公告)号：US20070071149A1

公开(公告)日：2007-03-29

申请号：US11521702

申请日：2006-09-15

Applicant: Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling

Inventor： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling

IPC: H04L1/02

CPC classification number: H04B7/0404 ,  H04B7/0805 ,  H04B7/0808 ,  H04B7/0811 ,  H04B7/0814 ,  H04B7/0857 ,  H04B7/0874 ,  H04L1/0003 ,  H04L1/0057 ,  H04L1/0066 ,  H04L25/022 ,  H04L27/2647 ,  H04W72/085

Abstract: Systems and methods are provided for enhancing signal quality at receivers in a wireless network. In one embodiment, an antenna is selected from a subset of antennas based on a signal quality parameter such as received signal power or signal-to-noise ratio (SNR). In another embodiment, multiple antennas are applied to independent signal processing paths for the respective antennas where output from the paths is then combined to enhance overall signal quality at the receiver.

Abstract translation: 提供了用于在无线网络中的接收机处提高信号质量的系统和方法。 在一个实施例中，基于诸如接收信号功率或信噪比（SNR）的信号质量参数从天线子集中选择天线。 在另一个实施例中，多个天线被施加到各个天线的独立信号处理路径，其中来自路径的输出然后被组合以增强接收机处的整体信号质量。

公开(公告)号：US20070070963A1

公开(公告)日：2007-03-29

申请号：US11359148

申请日：2006-02-21

Applicant: Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

Inventor： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

IPC: H04Q7/24

CPC classification number: H04W48/16

Abstract: Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.

Abstract translation: 描述了便于在无线通信环境中监视RF信道以确定一个或多个信道是包括仅前向链路（FLO）信号的系统和方法。 接收机可以接收具有FLO信号的第一RF信道，并且可以监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以在第一RF信道和所监视的RF信道之间切换，以便于提供FLO信号的无缝接收，FLO信号可以在RF信道之间超帧同步。 可以使用广域识别信道能量检测协议和广域开销信息符号解码错误检测协议中的一个或多个来执行FLO信号检测。