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61. 发明申请

US20090190675A1 SYNCHRONIZATION IN A BROADCAST OFDM SYSTEM USING TIME DIVISION MULTIPLEXED PILOTS 审中-公开
标题翻译：使用时分多路复用器的广播OFDM系统中的同步
公开(公告)号：US20090190675A1
公开(公告)日：2009-07-30
申请号：US11933231
申请日：2007-10-31
申请人： Fuyun Ling , Alok Kumar Gupta , Raghuraman Krishnamoorthi , Ramaswamy Murali , Murali Ramaswamy Chari , Rajiv Vijayan , Bojan Vrcelj
发明人： Fuyun Ling , Alok Kumar Gupta , Raghuraman Krishnamoorthi , Ramaswamy Murali , Murali Ramaswamy Chari , Rajiv Vijayan , Bojan Vrcelj
IPC分类号： H04L27/28 , H04J3/06
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/0051 , H04L5/0064 , H04L7/042 , H04L25/0212 , H04L25/0216 , H04L25/0224 , H04L25/0226 , H04L27/2613 , H04L27/2656 , H04L27/2657 , H04L27/2662
摘要： In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least S1 identical pilot-1 sequences of length L1 and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2>L1, S1·L1=N, and S2·L2=N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot-1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).
摘要翻译：在OFDM系统中，发射机在第一组子带上广播第一TDM导频，随后在每帧中的第二组子带上接收第二TDM导频。每个组中的子带从N个总子带中选出，使得（1）第一TDM导频的OFDM符号包含长度为L1的至少S1个相同的导频1序列，以及（2）第二TDM导频的OFDM符号包含至少S2个长度为L2的导频-2序列，其中L2> L1，S1.L1 = N，S2.L2 = N。发射机还可以广播FDM导频。接收机处理第一TDM导频以获得帧定时（例如，通过执行不同导频-1序列之间的相关）并且进一步处理第二TDM导频以获得符号定时（例如，通过检测导出的信道脉冲响应估计的开始从第二TDM导频）。

62. 发明申请

US20090028256A1 METHOD AND APPARATUS FOR SENSING SIGNALING PARAMETERS IN A WIRELESS COMMUNICATIONS NETWORK 有权
标题翻译：用于无线通信网络中传感信号参数的方法与装置
公开(公告)号：US20090028256A1
公开(公告)日：2009-01-29
申请号：US11834653
申请日：2007-08-06
申请人： Durk L. van Veen , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Krishna Kiran Mukkavilli , Fuyun Ling
发明人： Durk L. van Veen , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Krishna Kiran Mukkavilli , Fuyun Ling
IPC分类号： H04L27/28
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0053 , H04L5/008 , H04L5/0094 , H04L27/2607 , H04L27/2626 , H04L27/2628 , H04L27/2647 , H04L27/2656
摘要： 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.
摘要翻译：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。

63. 发明申请

US20080291860A1 MULTIPLEXING AND TRANSMISSION OF MULTIPLE DATA STREAMS IN A WIRELESS MULTI-CARRIER COMMUNICATION SYSTEM 有权
标题翻译：无线多载波通信系统中多路数据流的多路复用与传输
公开(公告)号：US20080291860A1
公开(公告)日：2008-11-27
申请号：US11751631
申请日：2007-05-21
申请人： Rajiv Vijayan , Aamod Khandekar , Fuyun Ling , Gordon Kent Walker , Ramaswamy Murali
发明人： Rajiv Vijayan , Aamod Khandekar , Fuyun Ling , Gordon Kent Walker , Ramaswamy Murali
IPC分类号： H04J3/24
CPC分类号： 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
摘要： 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.
摘要翻译：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。

64. 发明申请

US20080220723A1 COHERENT INITIAL ACQUISITION 有权
标题翻译：相关的初步收购
公开(公告)号：US20080220723A1
公开(公告)日：2008-09-11
申请号：US11860505
申请日：2007-09-24
申请人： Raghuraman Krishnamoorthi , Tao Tian , Fuyun Ling , Yuheng Huang
发明人： Raghuraman Krishnamoorthi , Tao Tian , Fuyun Ling , Yuheng Huang
IPC分类号： H04B7/00
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/0048 , H04L27/261 , H04L27/2655
摘要： 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.
摘要翻译：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。

65. 发明申请

US20080186935A1 MULTIPLEXING AND TRANSMISSION OF MULTIPLE DATA STREAMS IN A WIRELESS MULTI-CARRIER COMMUNICATION SYSTEM 失效
公开(公告)号：US20080186935A1
公开(公告)日：2008-08-07
申请号：US11933264
申请日：2007-10-31
申请人： Fuyun Ling , Murali Ramaswamy , Ashok Mantravadi , Raghuraman Krishnamoorthi
发明人： Fuyun Ling , Murali Ramaswamy , Ashok Mantravadi , Raghuraman Krishnamoorthi
IPC分类号： H04B7/216
CPC分类号： H04L5/003 , H04L5/0007 , H04L5/0037 , H04L5/0039 , H04L5/0041 , H04L5/0053 , H04L5/0064 , H04L5/0094
摘要： 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.

66. 发明申请

US20080159449A1 METHODS AND APPARATUSES FOR REDUCING INTER-CARRIER INTERFERENCE IN AN OFDM SYSTEM 失效
标题翻译：用于减少OFDM系统中的载波间干扰的方法和装置
公开(公告)号：US20080159449A1
公开(公告)日：2008-07-03
申请号：US11674632
申请日：2007-02-13
申请人： Tao Tian , Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Fuyun Ling
发明人： Tao Tian , Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Fuyun Ling
IPC分类号： H04L25/08
CPC分类号： H04L27/2657
摘要： 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.
摘要翻译： 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。

67. 发明申请

US20080123540A1 METHODS AND APPARATUS FOR SIGNAL AND INTERFERENCE ENERGY ESTIMATION IN A COMMUNICATION SYSTEM 有权
标题翻译：通信系统中信号和干扰能量估计的方法和装置
公开(公告)号：US20080123540A1
公开(公告)日：2008-05-29
申请号：US11563627
申请日：2006-11-27
申请人： Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
发明人： Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
IPC分类号： H04J1/16
CPC分类号： H04B1/1027
摘要： 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).
摘要翻译：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）。

68. 发明申请

US20080107217A1 NARROW-BAND INTERFERENCE CANCELLER 有权
标题翻译：窄带干扰CANCELLER
公开(公告)号：US20080107217A1
公开(公告)日：2008-05-08
申请号：US11557035
申请日：2006-11-06
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
IPC分类号： H04B1/10
CPC分类号： H04L25/03044 , H04B1/1036 , H04B1/109 , H04B15/00 , H04B2215/061 , H04L2025/03477
摘要： 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.
摘要翻译：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）。

69. 发明申请

US20070153924A1 Methods and apparatus for noise estimation in a communication system 有权
标题翻译：通信系统中噪声估计的方法和装置
公开(公告)号：US20070153924A1
公开(公告)日：2007-07-05
申请号：US11516910
申请日：2006-09-06
申请人： Fuyun Ling , Krishna Kiran Mukkavilli , Gordon Kent Walker
发明人： Fuyun Ling , Krishna Kiran Mukkavilli , Gordon Kent Walker
IPC分类号： H04K1/10
CPC分类号： H04L1/20 , H04L27/2602 , H04L27/2647
摘要： 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.
摘要翻译：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。

70. 发明申请

US20070071149A1 Maximum ratio combining in broadcast OFDM systems based on multiple receive antennas 审中-公开
标题翻译：基于多个接收天线的广播OFDM系统中的最大比组合
公开(公告)号：US20070071149A1
公开(公告)日：2007-03-29
申请号：US11521702
申请日：2006-09-15
申请人： Linbo Li , Ashok Mantravadi , Fuyun Ling
发明人： Linbo Li , Ashok Mantravadi , Fuyun Ling
IPC分类号： H04L1/02
CPC分类号： 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
摘要： 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.
摘要翻译：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。

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